CELEX: 51976PC0401
Language: en
Date: 1976-07-26
Title: PROPOSAL FOR A COUNCIL DIRECTIVE ON THE QUALITY REQUIREMENTS FOR WATERS CAPABLE OF SUPPORTING FRESHWATER FISH (submitted to the Council by the Commission)

ARCHIVES HISTORIQUES
DE LA COMMISSION
COLLECTION RELIEE DES
DOCUMENTS "COM"
COM (76) 401
Vol. 1976/0121
 ---pagebreak--- Disclaimer
Conformément au règlement (CEE, Euratom) n° 354/83 du Conseil du 1er février 1983
concernant l'ouverture au public des archives historiques de la Communauté économique
européenne et de la Communauté européenne de l'énergie atomique (JO L 43 du 15.2.1983,
p. 1), tel que modifié par le règlement (CE, Euratom) n° 1700/2003 du 22 septembre 2003
(JO L 243 du 27.9.2003, p. 1), ce dossier est ouvert au public. Le cas échéant, les documents
classifiés présents dans ce dossier ont été déclassifiés conformément à l'article 5 dudit
règlement.
In accordance with Council Regulation (EEC, Euratom) No 354/83 of 1 February 1983
concerning the opening to the public of the historical archives of the European Economic
Community and the European Atomic Energy Community (OJ L 43, 15.2.1983, p. 1), as
amended by Regulation (EC, Euratom) No 1700/2003 of 22 September 2003 (OJ L 243,
27.9.2003, p. 1), this file is open to the public. Where necessary, classified documents in this
file have been declassified in conformity with Article 5 of the aforementioned regulation.
In Übereinstimmung mit der Verordnung (EWG, Euratom) Nr. 354/83 des Rates vom 1.
Februar 1983 über die Freigabe der historischen Archive der Europäischen
Wirtschaftsgemeinschaft und der Europäischen Atomgemeinschaft (ABI. L 43 vom 15.2.1983,
S. 1), geändert durch die Verordnung (EG, Euratom) Nr. 1700/2003 vom 22. September 2003
(ABI. L 243 vom 27.9.2003, S. 1), ist diese Datei der Öffentlichkeit zugänglich. Soweit
erforderlich, wurden die Verschlusssachen in dieser Datei in Übereinstimmung mit Artikel 5
der genannten Verordnung freigegeben.
 ---pagebreak--- COMMISSION OF THE EUROPEAN COMMUNITIES
                                         COM(76)401 final.
                                         Brussels . 26 July 1976 *
     PROPOSAL FOR A COUNCIL DIRECTIVE ON THE QUALITY REQUIREMENTS FOR
               WATERS CAPABLE OF SUPPORTING FRESHWATER FISH
              ( submitted to the Council "by the Commission)
 COM(76) 401 final .
 ---pagebreak---                                                               ΕΠν/378/75-Ε
ExPLAJTATORY MEMORANDUM
1 « Introduction
     Degradation in the quality of water due to the discharge of pollutants
    has adverse effects on certain fish populations , particularly the re­
     duction in the overall number of certain speoies or even c in some
     cases , the disappearance of some of these speoies .
     In order to protect fishing interests and ensure that fresh w^ier is
     protected against pollution , the European Communities * action programme
     on the environment! stipulates that Community measures must provi.de for
     the definition of quality objectives for waters and in particular the
     establishment of a numb ar of reference parameters and limit values in
     respect of the various uses and functions of water , with epeoial refe­
     rence to waters oapable of supporting freshwater fish .
                                                 /
2 * Aim pursued
     The quality objectives contained in this Directive aim at allowing
     fish belonging to indigenous speoian presenting a natural diversity
     or fish belonging to speoies whose presenoe is considered desirable
     for water management to live in favourable conditions „ When laying
    down parameters and numerical values for determining water quality
     as much attention as possible has been paid to the effects of each
     parameter not only for the survival of fish at different stages in
     their life cycle but also for their growth , reproduction and perform
    manoe and for other components of the aquatic ecosystem which may
     provide them with shelter or food#
     These quality objeotifves are not incompatible with the water quality
     requirements for commercial or recreational fishings
     To allow for differences in the fish sensitivity to harmful susbstanoes ,
     the waters capable of supporting them, have been divided into two ca­
     tegories namely salmonid waters and oyprinid waters®
    For the purposes of this proposal
    - Salmonid waters are waters which support or are oapable of supporting
       fish belonging to speoies such as s Aaony trout f grayling, ooregonidae
    •" Cyprinid waters are waters whioh support or are capable of supporting
       the cyprinidae or other speoies whiah normally share the sa&e habitat
       as ths latter , suoh ae pike , perch arid eels * '
   OJ N° C 112 of 20 December 1973
 ---pagebreak---                                         2                    ENV/378/75-E
    This propoaal for a Directive considers only those problems concerning
    the quality requirements for waters intended to support the life of
    freshwater fish® It does not relate to health or consumer protection
    which is covered by other Community or national provisions «
3a Existing conditions and Legislation
    A review of the legal situation in the Member States has shown that
   national laws make no mention of criteria defining the quality requi­
    rements for waters capable of supporting fish and refer only to standards
    for discharges into public watercourses ,,
    In Belgium a Royal Decree pursuant to the law of 1971 on the protection
    of surface waters as regards effluents specifies in particular that
    inland fisheries must be protected# The provisions in question relate
    particularly to temperature , pH value , oxygen , hydrocarbons and detergents 0
    In Denmark a special environmental protection lew (if0 372 of 13 Jun9 1973 )
   states that authorization for any discharge must be obtained from the
   authority responsible .
   French legislation includes a number of provisions affording' various
   forms of protection as regards the use of water 0 The most important are
   - the Fisheries Acts of 1829 and 1949 ( Code nml )
   - and the Act of 16 December 19^4 ( implementation of a comprehensive
      water management policy).
   The latter act provides for the establishment of quality objectives for
   various types of water , including fishing waters® Up to now quality
   objectives have not beoidefined for fishing waters .
   In the United Kingdom there are in certain cases laws relating specifically
   to the control of pollution when this affeots fishing® In England and
   Wales the 1975 Salmon and Freshwater Fisheries Act prohibits the discharge
   of substances harmful to fishing® Different types of authorities admi­
   nister fishing in England and Wales , Scotland and Northern " reland .
   Despite differences in the provisions and in the methods of pollution
   control , these laws are largely similar in effect#
   In Italy the standards laid down under the Fisheries A' t(HD 8 October 1931
   N° 1604 amended by the DPR of 10 June 1955 n® 9$7 a**'         departmental
   order of the Ministry of Agriculture and. Forestry of 7 .5 February 1956)
   are designed to ensure that aquatic fauna are fully safeguarded and
   proteoted , in particular , from risks arising out of the discharge of
   industrial effluents .
   In Ireland the discharge into the water of any substaiioe likely to prove
   harmful or toxic to fish life is prohibited undel* the Fisheries (Conso­
   lidation ) Act 1959, Sections 171 and 172 amended by. .the Fisheries
   ( Amendment ) Aot 1962 *    ! • '           n:.! : L •„    ...    ■.
                                      ;               - ni         -7
 ---pagebreak---                                         3                        ENV/373/75-E
                                                                  » V    · ·
 In Luxembourg the Fisheries Act of 21 March 1947 totally prohibits the
discharge into waterways of any substanoes and residues likely to prove
harmful to fish life or to destroy the aquatio flora or fauna. Another
Act of 16 May 1929 prohibits the discharge of any substance likely to
prove harmful , among other things , to water used for animal-feeding
purposes , for fish-farming or for the conservation of edible fish or
crustaceans#                                                           ,
In the Netherlands the "Wet Verontreiniging Opperviaktcwateren" (Surface
Waters Pollution Act ) of 19^9 establishes a system of concessions for the
qualitative protection of water . Specific laws govern the discharge of
various substanoes , e.g. , "Hinderwet" (Nuisances Act ) ( 1952 ), "- Qntgrondinge-
wet" ( Excavation Act ) ( 19^5 ) » "Bestri jdingsmiddelenwet" ( Pesticides Act )
 ( 1962 ), "Wet Gevaa-rlijke Stoffen" (Dangerous Substances Act ) (1965 ) j
"Wet op de lijkbezorging" (Dieposal of CorpseS Act ) ( 1896)#
In the Federal Republic of Germany the latest version , dated 2 Maroh 1974,
of a special Bill oonoerning the management of national water resources
 (Water Resources Aot ) lays down minimum water quality requirements and
lists the speoifio substanoes which must not be discharged into the water ,
and those which adversely affeot water quality# The 1957 Water Resouroes
Law prohibits the unauthorized disoharge of pollutants#
In view of the legal situation in the Member States and the faot that the
Treaty has not provided all the powers necessary for aohieving these
objectives , Artioles 100 and 235 must be invoked as a legal basis for
the proposal for a Directive#
Under the provisions of these Artioles the opinion of the European
Parliament and the Economic and Social Committee must be sought#
Comments on the proposal for a Directive
»
4*1 • General comment s-
        Pursuant to the European Communities' Environment Programme , the
.    . Commission set up a Working Part;,' of national experts to assist
        with the preparation of the Directive# In six meetings , this Working
        Party has supplied the necessary . information on the legal situation
        in the Member States and has: helped the Commission defined the
        properties of the waters in question 0 During its work, the Working
        Party consulted the teohnical documents published by the European
        Inland Fisheries Advisory Commission ( FAO) and :,he techr^.cal reports
      ■ from national laboratories Saiit to the Commission by tin various
        delegations#
        These reports and the results of the consrlt&t        with the ejeperts
        are oontained in working document ENV/330/75o
        Data on many pollutants is still lacking ev     rasearch must be
        conducted in this field to determine th? r*v£er quality requirements
        for these pollutants#
 ---pagebreak---                                          4                      ENV/378/75-E
4®2 ® Soope
       The proposal for a Directive relates to all standing or running
       freshwater whioh has or is to be designated by a deoislon of the
       competent authorities in the Member States as requiring protection
       to enable fish to live in favourable conditions .
       The Directive does not apply to the waters of natural or artificial
       ponds where fish are intensively farmed for commercial purposes®
4o3 « Parameters and their numerical values
      Although the parameters listed in the Annex to this proposal have been
       considered in isolation , the interaction of their effeota with other
      water quality characteristics has sometimes been pointed out end
      quantified ^
      However , this interaction with factors as pH , temperature and water
      hardness does not take account of other synergio effects due to the
       simultaneous presence of various harmful substances .
      In this case , the parametie values may be substantially modified in
    . comparison with the values listed in the proposal for a Directive 0
      Certain harmful substances may have sublethal effects , even at
      levels substantially lower to those known to be directly harmful *
      The competent authorities will have to -take account of this and
      lay down epeoifio provisions in these particular oasee ^
      Tho mixing of ' Harmful substances has been taken into consideration ,
  ' • albeit only 'roughly $ The method of calculation which 'considers that the
      tcxicity of a mixture of harmful substances equals the sum of the
      toxicity levels of the various substances has been adopt ed a
      The radioactivity parameters have not been Included in the list given
      in the proposal for a Directive ,, They must Conform to the provisions
      the Member States have adopted pursuant to the basic standards of the
      Euratom Treaty.                                         .     1 ,
      The list of parameters contained in the Annex cannot be considered as
      e haustive . The data available on certain pollutants is too incomplete to
      enable numerical levels to be proposed e The absence of certain parameters
      from the list does; not therefore mean that they do not have a harmful
      effect on fish *
      As already pointed out , the values contained in the lir     to this
      proposal apply only in those oases where the levels .ex* other environ­
      mental factors are favourable which implies in particular that the
      concentrations of harmful substances are nil or ve: ? low® For all
      these reasons the provisions referred to in Article 8 about the
      non-degradation of good-quality waters must be ays. lied with the
      utmost stringency and without any exceptions o
      The meaning of the letters used in the Annex to this proposal is as
      follows s
      I * The values correspond to good living conditions for fish « Where
          a parametric value is given in column I , that value is binding® The
          Member States may not fix a loss stringent value# They may however lay down
          more stringent values®
      G « The values correspond to living oonditiona whioh are in hartaoifsy
          with the biogeographioal features of the environment .
 ---pagebreak---                                        5                               ENV/3 78/75-E
      ■me parametrio values given in column 0 are intended solely as                       »
      information and must be considered as guidelines ,, Where a value
      appears in both column I and column G the Member States have the
      option of laying down more stringent values based on the 0 value. •
      If the Member States adopt these guidelines they become binding in
      the countries where they have been adopted#
  0• In the case of parametric values designated by the A©tter 0 ,                        ^ain
      derogations are possible on the grounds of abnormal meteorological
      conditions and special natural conditions .
  Waters oapable of supporting freshwater fish shall ba taken as complying
  with the parametric values laid' down' in the Annex (with tha exoeption
  of the values laid down for dissolved oxygen , pH and temparature ) where
  they meet the following conditions s
 «•> in the oase of the parameters given in column I , whan the values given
     by 95 /o of "the samples analysed are less than or equal .to the values
     shown in this oolumn }
  - in the oase of the parameters given in oolumn 0 , when the values from
     90 fj of the Samples analysed are less than or equal $0 the value shown
     in this column#                                       :     ,
  For the 5 or 10 % of samples which , according to the. circumstances , do
  not comply t                 '
  (a) the values cre&sured In the water must not deviate br moi-e than 50 #
        fron the limit value of the parameters in question ;
  (b ) consecutive samples of water taJcen at statistically appropriate
       intervals must not deviate from the relevant parametrio values#
  As far as dissolved oxygen is concerned , the levels given are expressed
■ as minimum oonoentrations fixed for 50        95 % and 100 % of the samples
  examined in the oourse of one year ( cumulative frequency) ,
                                          •                        • ■     <
                                                                                   » •»
  As fair as pH and temperature are eonosmea , the permissible limit
  for- variation has been explicitly fixed, in the Annex*,
             , • ;             )«•           '           *   v           1              .
                   : ; · '          ,        ,· ι· , . '       :       '     ; ΪΑ.
 ---pagebreak---                                          6                        ENV/373/75-E
                                                •         •    N . * . .        *
                                                               <             *
                  PROPOSAL FOR A COUNCIL DIRECTIVE ON THE QUALITY
              .   HEQUIIM>EKTS FOR HATERS CAPABLE OP SUPPORTING
                  FRESHWATER FISH
 The Council of the European Communities t                   '          .
 Having regard to the Treaty establishing the European Communities , and
 in particular Articl© 100 and 235 thereof ,
 Having regard to the proposal from the Commission ,                  •   • ' «     »
                                                                                        ι
 Having regard, to the Opinion of the European Parliament ,                «
 Having regard to the Opinion of the Economic and Social Committee ,
 Whereas the protection and improvement of the environment necessitates con­
 crete measures to protect waters against pollution , including waters capable
 of supporting freshwater fish ;           .
'Whereas it is necessary fron the ecological and economic viewpoint to
 safeguard fish populations from various harmful consequences resulting
 from the discharge of harmful substances into the waters , such as the re­
 duction in number of fish belonging to a certain species and even in some
 cases the disappearance of a number of these species ;
 Whereas the programme of action of the European Comfaunities on the
 environment ( l ) provides that quality objectives are to be jointly drawn
 up fixing the various requirements which an environment must meet inter
 alia the definition of parameters for water , including waters capable of sup­
 porting fish ;
 Whereas differences between the provisions already in force or in preparation
 in the various Member States as regards the quality requirements for waters
 capable of supporting the life of freshwater fish nay distort conditions
 of competition and thus have a direct effect on the functioning ot the common
 market ; whereas laws in the field must be harmonized ar provided for by Article
 100 of the Treaty ;                                                           –
 Whereas it is necessary to couple this approximation of laws with Community
measures aiming to achieve , by means of widexwahging provisions , one of
 the Community 's objectives in the field of environmental protection
 and the improvement of the quality of life ; whereas certain specific
 provisions must bo laid down in this connection ; whereas , since the powers
 of action required to this end have not been provided for. in the Treaty,
4tJ>9 necessary , to invoke Article 235 of the Treaty}      ;                         -
                               .: ,   '■ . '                          "           -
 * ( V W C 112 of 20 December 1973
 ---pagebreak---                                               7
                                                                                    EtfV/378/75~E
      Whereas, in order to attain these quality objectives -fch *                         " ex *
      must lay down limit values corresponding to certain 4^™+^                             States
      waters cap.Mo of support!^ frcsLate^^fSe^lr^cSTo
       those        „lthin 5 years followir,;- the notiftcation »f this Dlr™U™-
  : - srsu1:
   : SB&«S-ÎUSÎS SS» " =£=
Whereas to" ensure that the required standard for waters capable of supplying
freshwater fish is checked , samples should be taken regularly and the measures
relating to parameters set out in the Annex should be carried out ;
      Whereas the Member States are unable to control certain circumstances and
 ' it is therefore necessary to provide for the possibility of having
      recourse to certain derogations ; whereas the Commission must be notified
      of these derogations ;                                         .
      Whereas technical progress necessitates rapid adaptation of the technical
      requirements laid down in the Annex of this Directive ; whereas , in order
      to facilitate the introduction of the measures required for this purpose ,
      a procedure should be provided for whereby close cooperation would be
      established bfctween the Member States and the Commission within a Committee
      on Adaptation to Technical Progress set up by virtue of the Council Direotive
      of 8 Decesaber 1975 concerning the quality of bathing water.*-
*·· ■ : .     . - ν,; · \ ν · . !
                  •       '
                                        *· ··· · :.ι ···:···'. .··, ; · ο · -– ·'·»
                                              .. ..                     •  • .. •   f,    y
                                                                                             · · λ
                                                                                                 :
    ; °J H° L 31 of 5 February 1976 ( 76/16O/EEC )
 ---pagebreak---                                        8                       ENV/378/75-E
                                                                    ν
HAS ADOPTED TIGS DIRECTIVE :
                                 ■ Article 1
1 . Tins Directive concerns the quality requirements for waters capable of
    supporting freshwater fish .                            .
2® For the purposes of this Directive , Waters capable of supporting
    freshwater fish means any running or standing fresh water whioh
    supports or is capable of supporting fish belonging to j
    - indigenous speoies presenting a natural diversity or
    – species whoso presence is judged desirable for water management
      purposes .
    Waters intended for intensive fish-farming in natural or artificial
    fishponds are excluded .                                      ,
    Salrnonid waters are waters which support or are capable of supporting
    fish belonging to the following species : salmon , trout , grayling,
    coregonidae .                                  y
    Cyprinid waters are waters which support or are capable of supporting
    the cyprinidae or other species whioh normally share the same habitat
    as the latter , such as pikej perch and eels .
                                   Article 2
1 , The physical and chemical parameters laying down the quality requirements
    for waters intended to support the life of freshwater fish are listed
    in the Annex whioh forms an integral part of this Directive *
2 » For the application of these parameters freshwater is divided into
    salrnonid waters and cyprinid waters .                              . .
                                   Article 3
1 . The Member States shall set , for the waters capable of supporting
    freshwater fish , the parametric values given in the / mex .
2 . The values set pursuant to paragraph 1 may not be lo^s stringent than
    those given in column I of the Annex .                    <■
3 . Where values appear in column G of the Annex , whether or not there
    is a corresponding value ill column I of the Annex, Member States shall
    endeavour , subject to Article 8 , to observe them as guidelines .
 ---pagebreak---                                                                 ENV/378/75-E
                                   Article 4
For the purposes of applying this Directive , the Member States shall
specify those waters capable of supporting freshwater fish .
                                   Article 5
Member States shall adopt all necessary provisions to ensure that the
quality requirements for waters , capable of supporting freshwater fish con­
form to the parametric values laid down in accordance with Article 3
within five years after the entry into force of this Directive .
                                   Article 6
1 . For the purposes of Article 5 » water capable of supporting freshwater
fish shall be deemed to conform to the provisions of this Directive if
samples of that water , taken at the intervals specified in the Annex ,
at the same sampling point and over a period of 12 months , show that it
conforms to the parametric values for the quality of the water concerned , in
the case of :
- 95      of the samples for parameters corresponding to those specified in
   column 1 of the Annex , except for temperature , dissolved oxygen and pH
   which must oonform to the percentages given in the Annex ;
- 90 '/*> of "th® samples in all other cases , except for dissolved oxygen
   which must conform to the percentages given in the Annex ;
and if , in the case of the 5 and- 10 > of the samples which do not comply :
- the values measured in the water do not deviate by more than 50 /'■> from
   those of the parameters in question ;
- consecutive water samples taken at statistically suitable intervals do
   not deviate from the relevant parametric values .
2 . Deviations from the values referred to in Article 3 shall not be taken
into consideration in the calculation of the percentage provided for in
paragraph 1 when they are the result of floods or natural disasters . •
                                   Article 7
1 . The competent authorities in the Member States shall carry out sampling
operations , the minimum frequency of which is laid down . in the Annex .
2 . The exact sampling point , the distance from this point to the nearest
point where pollutants are discharged and the depth at which the samples are to
be taken shall be fixed by the competent authority of each Member State
on the basis of local environmental conditions in particular .
                                                                           Λ
3 . The reference methods of analysis to be used for the various parameters
in question are listed in the Annex . The Member States shall take the
necessary measures to ensure that laboratories using other methods
prove to the Commission that the results obtained are equivalent
or comparable to those specified in the Annex .
 ---pagebreak---                                       10                      ENV/370/75-E
                                   Article 8"
1 . Implementation of the measures taken pursuant to this Directive may wider
no circumstances lead to degradation of the present quality of v/aters capable
of supporting freshwater fish .
2 . Member States may at any time fix more stringent values than those laid
down in this Directive , in respect of waters capable of supporting fleshwater
fish .
                                   Article 9
When waters capable of supporting freshwater fish cross national frontiers ,
the riparian States shall collaborate in determining the transfrontier
freshwraters   to which the Directive relates and the values to bo used
for defining the joint quality objectives applicable to these waters . The
Commission shall participate in this collaboration
                                   Article 10
This Directive may bo 'waived :
( a ) in the case of certain parameters marked ( 0) in the Annex , because
      of exceptional weather or geographical conditions ;
(b ) when water capable of supporting freshwater fiBh undergoes natural enrichment
      in certain substances causing a deviation from the values prescribed in the
      Annex .
Natural enrichment means the process whereby , without human intervention ,
a given body of water reoeives from the soil certain substances contained
therein .                       ,
Where a Member State waives the provisions of this Directive , it shall
forthwith notify the Commission thereof , stating its reasons and the periods
anticipated .
                                   Article 11
Such amendments as are necessary for adapting :
– the parameters
- the G and I values for these parameters , and
- the methods of analysis
contained in the Annex to technioal progress , shall be adopted by the
Committee set up by virtue of Article 10 of the Council Directive of
8 December 1975 concerning the quality of bathing water pursuant to the
procedure laid down in Article 11 of that Directive . ,
 ---pagebreak---                                        11                      KNV/3 7 8/73-E
                                  Article 12
 1    iember States shall bring into force the laws , regulations and admi–
 i    , rative provisions necessary to comply with this Directive within two
y    .ns of its notification . They shall forthwith inform the Commission
 t    -eof •
2    Iember States will communicate to the Commission the texts of the main
r     risions of national law which they adopt in the field covered by this
I    îctive »
2    iember States shall ensure that the texts of the main provisions of
r   ional law which they adopt in the field covered by this Directive are
t   nunicated to the Commission .
                                  Article 13                               •
'   s Directive is addressed to the Member States ,
   le at Brussels ,
                                              For the Council
                                              The President
 ---pagebreak---                                                                                                                               Err/37S/ 75~u
                                                                                             situations in winch the levels oi the
   General observation : The values - hown in the table for e; / h parameter corre           favourable ,  which implies , in particular ,
                           other pararsters , whether or not ccisi&ered in t is *jme >       low .
                           that the cc.icentrations of harmful substances are zero
                                                                                                kinxnun
                                                                      Methods of analysis or    sampling            OBSERVATIONS
       PARJIETEH      Ealnonid waters         îvprinid waters                 inspection        and measu­
                                                                                                ring fre­
                                                                                                quency
                                                                                                   quarter­   Too rapid an increase
1 ) Temperature 0°C                   « )                   s )                                    ly         in temperature must "be
    - during the                  <20(0 )                420(0 )                                              avoided so ohat fish
                                                                                                   weekly     reproduction is not affected
      . warn ser.son                                        * )          Thernomotry               if ther­
    -- during tiie .               vo(o )                ^ 10(0 )                                  mal dis­
        cold season                                                                                charge
                      af ) The temperature shown apply to waters                                   is sus­
                      in areas directly subject to the effect                                      pected
                      cf thermal discharges . Khen natural water
                      temperature does not exceed the I values ,
                      increases of 1,5 °C insalnonid waters
                      cjid 3°C in cvprinid waters are pc,f:.iissibl «
                      in the thermal discharges fixing zones
                      and are applicable in all seasons .
2 )- Dissol- rr/l                                                      Electrochemical          Monthly       In order to take account
                            > 9    50,.· > 9    50λ- > 8   50 - > 7                                           of seasonal variations in
                                                           95;· > 5   method                    24-hour
       vea                         95;· >7                                                      variation     oxygen contenx , the levels
       oxygen                  7  ιοσ;- > 5 100 : >5 ιοσ,ί >3                                   with at       to be adhered to are expressed
                                                                                               .least one     as minimum concentrations
                                                                                                sample an     fixed for 50% 95> and 100-;,
                                                                                                hour          of the samples examined in
                                                                                                              the course of one year
                                                                                                              ( cumulative frequency).
                                                                                                              X values : The periods during
                                                                                                             which the dissolved oxygon
                                                                                                              concentration is lower ^han
                                                                                                              7 mg/l ( salnonid waters ) or
                                                                                                              5 mg/l ( cyprinid waters )
                                                                                                             must be short enough not to
                                                                                                             harm the fish .
 ---pagebreak---                                                                            λΙΉΕΧ                                            E^/37S/75-2           2.
                                                                                îiethods of analysis or        iinimun
                         SalmcnicL wa-ters            Cyprinid  \ raters                 inspection           panpl ing
                                                                                                              knd mea­          OBoZltVlTI 01:13
                                                                                                              suring
                             G         I!I
                                            I         ~"g       !     I
                                                                                                              Frequency
                                                                                                            |
3 ; pH            pH                       5-9 ( 0 )                6-5 ( 0 )
                                                                                                            I
                                              =)                                                            I
                                                                                                            I
                                                                                 Elect rone try               - quarter­
                                                                                 Calibration by ce2nsof           ly
                                                                                 two solutions with
                         a ) Art if ici al pll vari ,at ions wit !h respect                                   - weekly
                                                                                 known pH values , prefe­         if chemin
                         to the " natural " vaiti-es must no t exceed
                                                                                 rably on either side of
                         + 0.5 of a pH unit in limits fa 11 ing                  the pH value being mea­         cal dis- |
                         between 6.0 and 9«0 p rovided th at these                                                charge
                                                                                 sured and proximate
                         variations do not ine rease the !harmfulness                                             is sus­
                                                                                 to it .
                         of other substances p resent in the water .                                              pected
/;.} Suspended rng/l'     <25 ( 0) |                  <25 (0)                    Filtration through a                       The values . shovrn are
     solids
                      I
                          ^             j                        I
                                                                  I
                                                                                 0.45 /u porous membrane
                                                                                 or centrifugation ; dryin;
                                                                                                                            average concentrations and
                                                                                                                            do not apply to suspended
                                                                 I
                                                                 ι
                                                                                 at 105°C and weighing                      solids with harmful chemical
                       !
                                                                                                                            properties . jTloods are
                                                                                                                            liable to cause particu­
                                                                                                                            larly high concentrations .
 ---pagebreak---                                                                  AITî'JEX
                                                                                                                            E2TV/373/75-E     3.
                                                                                                              ïiii-miuii
         PAILuIETER             Salnonid waters   Cyprinid ■waters          METHDDS OF AISALYSIS OR           SA1IPLIHG
                                                                                  Iï-TSPECTION                AHD ESA-              OBSHÎVATIOiTS
                                                                                                              SUPJITG
                                  r,        I       a      I   I
                                                                                                              PREQUEîJCY
                                                                    __j
                                                                                                           I
5) D30        ■ mg/ 1 02        <3                                        Determination of     by the !
                                                                          Winkler method before and-
                             i                                            sifter 5-day incubation in
                             i-
                             i                                            conplete darknes s~a£ " 2'0"° +"
                                                                          1°C
                                                                                                           I
5 ) Phospha- L-g/l                                                        Absorption spectrophotome­
      tes         pn
                     4
                         1      <0' 2              <0,4                   try after reduction of the                     ι
                                                                          phosmolybdic complex
7 ) ITitrates ag/l                                 <6                     Absorption spectrophoto­
                                                                          metry , with or without
                  1T0J                                                    prior reduction of the
                                                                          nitrates into nitrites
 "î ; ITilritt.' Jg/l           < °>°5             < 0,5                  Absorption spectropho-
                  TV                                                      netry
5 ) Total         ng/l     ' ^0,04                 < 0.2      / 1         Absorption spectropho­             i monthly
                                                                                                                          I
       ammonium   ÎTH ,                                                   tometry using indophenol                        I
                     4     !                                              blue
                            I
                                                I
 ---pagebreak---                                                                             Λ1ΤΙ7ΕΧ                                             3 78 , 75-- 4 .
                                                                                     DHODS CF JJTALY3IS OR
                          Dalnonid waters                 Cyprin id waters                                 s^TLiua
      PJJL^iETEl;                                                                         IIT3PECTI0F
                                                                                                           <iED I X.*-       OSSERVATICI :"
                                                                                                           3URIÎTG
                                                                                                           PTDQUIÎÎTCY
1C ) Fnenolic ccnipoundE                   <0 , 005(0 )             ^), 005(0 )   Aosorption spectropho­   Twice a     The levals shewn t zke
                     mg/l                        »)                      «0       tometry :                month       account of the presence cf
                          s ) Higher contents can be permitted where - Method using parani-                            chlorophenols . The levels
            CS B? OH      there are high natural contents . The dif-                tranilinej                         may be exceeded if free
                          Jtj'i'b'rxcnj compared with the natural values          – Method using~4–aciiaa              chlorine is no~ - reseat .
                          must be less than 0.005 mg/l . Fnenolic                   antipyrine .
                          compounds must not be present in such
                          concentrations that the;'- adversely affect
                          fish, flavour .               <
  . ) Petroleum                                  sì                      «)       Visual and by .taste      Twice a
      hy&rocarbons                                                                                         month
                          h) Petroleum products nust not be present
                           in the water in such quantities that
                          they :
                          - Fom a visible fila on the surface of
                           - the water or form coatings on the beds
                               of watercourses and lakes ;
                          - Impart a detectable "hydrocarbon"
                          –=tes4-e- to fish ;
                          - Produce harmful effects in fish .
12 ) non-          ag/l                    < 0,005                  <0,025        ITessler method associa­  Twice a
      ionized                                                                     ted with pH determina­   month
    . annoniuc     13H
                   ITU                                                            tion
13 ) Chlorine      mg/l                    < 0,004                  <0,004        Pal in raethod            Twice
              H0C1                                                                                         m'onth
         non-ionized
 ---pagebreak---                                                                      ÀNIIEX         .                          ETV/378/75-E          5.
                                                                                                 I
                                                                                                   MIEEUIi
    PxJlillETER                Salnonid waters .   Cyprinid waters      ÎEETHGD3 OP AI7ALY5IS OR j S^IPLHTG
                                                                               INSPECTION          itKD ïEii.–        OBSEEVAtIOIVS
                                      G       I      g     'i    I                                 sufiïtg
                                                             I                                     FEEQUMCY
13 ) Zinc     D£ / l ; Z:-.r                                             Atonie absorption       1 Twice a         The concentration linits
     water hardness             * ? »
                                                                                                   nonth           corresponding to the water
     (n -/l CaCO ) ' : : :                                                                                         hardness values lying1 between
                                                                                                                   10 and 500 '-g/l CaCO^ are to
                                                                                                                  "be calculated by interpolation .
                                                                                                                  For hardness levels lower than
         10 .                               < 0,03             ^ 0,3
         50 -     ■          -              ^0,2               ré°.7                                               10 ng/l CaC03 , the calculation
                                                                                                                   of the concentration linits
        100                                 ^ 0,3              ^ 1,0                                              by extrapolation does not
        500                                 ^0,5               ^ 2,0                                               give reliable results .
                                                                                                                I
 ---pagebreak---                                                                          .iiiîiEX                         sr;/37S/ 75 --E
X5) Other harmful substances (i value applicable to saLnonid and cyprinid waters )
      a ) îlon-persistent subs tances
           "The concentration of non -persistent substances , the half-life of which is less tnan 9o hours or which do not have cumula­
            tive effects , oust not exceed 0.1 of the' lethal concentration threshold anywhere or at cay tins .
           Moreover" the average concentration of such substances in 24 hours Bust net exceed 0.05 of the lethal concentration
            threshold ,
      b ) Persistent st-bstances
            The concentration ox substances which are persistent or have cumulative effects must uo such that it does not produce
            unwanted bio-accumulations : for some substances , this concentration aust not exceed 0.05 of the lethal concentration
            threshold jnywhore or at szi? tiae , aoreover , the average concentration of these substances in 24
            hours* aust not exceed 0.01 of the lethal concentration threshold. For other highly persistent substances , the "applica­
            tion factor" ( the factor by which the values of the lethal concentration threshold              nust be multiplied to obtain the
            safe concentration ) must be determined from case to case . Thus the concentration of cadmium -for instance nay not exceed
            0.C02 of the lethal concentration threshold anywhere or at any tine .
            Exci^ies of substances which are persistent or which have cumulative effects are :
            ~ organo'ialogen compounds
            – organophosphorus compounds
            - orrêttostahriic compounds
            - carcinogenic substances
            - mercury
            - cadmium
            Minimum sampling and measurement frequency : twice a month ,
1 g") fixtures of harmful substances (I value applicable to salnonid and cyprinid waters )
  " Substances having synergic or antagonistic effects -nust be discounted in the calculation below . Only the case of harmful
       substances having additive effects is . considered here .
       If
     ' a      3     ■     '   z represent the 'Concentrations of the different nixed suostances and
      -A a» I.*âr       *
                              Z a represent
                                        * ^
                                                 the permissible . concentrations " of the different,
                                                                                           ..
                                                                                                      suostances when they are ....
                                                                                                                                present singly.
       the coacentratioBs"crrT?H5' different harmful substances in the mixture are' considered ; to be permissible when :
                               A      .      B          Za
                               -s-       4 ,– +            S 1
                                A"
                                 a
                                         1"' 3.a
                                                        Zo
                                                         a
       iiny fractions such as X_ which are less than C.2 should be eliminated from .the ,sum of fractions given above".
                                   X„*a                                       :                                               -
       liinimum control frequency : monthly .
       s For certain parameters these concentrations are defined in the annex ; they should be laid down from case to case
           for the other parameters that are not specifically mentioned .                                  ■    -