Connecticut Administrative Code › Title 22a - Environmental Protection › 426 - Connecticut Water Quality Standards › Section 22a-426-9 - Environmental criteria

Current through July 10, 2024
(a)
Surface
			 Water Quality Criteria
(1) Surface
			 Waters shall meet the criteria listed in Table 1 to support the designated uses
			 identified for their particular classification.
Table 1 - Surface Water Criteria by Classification
Parameter
Class AA
Class A
Class B
Class SA
Class SB
Aesthetics
Uniformly excellent.
Uniformly excellent.
Good to excellent.
Uniformly excellent.
Good to excellent.
Dissolved Oxygen
Not less than 5 mg/l at any time.
Not less than 5 mg/l at any time.
Not less than 5 mg/l at any time.
Acute: Not less than 3.0 mg/l.
Chronic: Not less than 4.8 mg/l with cumulative periods
						  of dissolved oxygen in the 3.0 - 4.8 mg/l range as detailed in Note 1 to this
						  table.
Acute: Not less than 3.0 mg/l.
Chronic: Not less than 4.8 mg/l with cumulative periods
						  of dissolved oxygen in the 3.0 - 4.8 mg/l range as detailed in Note 1 to this
						  table.
Sludge deposits-solid refuse-floating solids-oils
						  and grease-scum
None other than of natural origin.
None other than of natural origin.
None except for small amounts that may result from the
						  discharge from a permitted waste treatment facility and none exceeding levels
						  necessary to protect and maintain all designated uses.
None other than of natural origin.
None except for small amounts that may result from the
						  discharge from a grease waste treatment facility providing appropriate
						  treatment and none exceeding levels necessary to protect and maintain all
						  designated uses.
Color
None other than of natural origin
None other than of natural origin.
None which causes visible discoloration of the surface
						  water outside of any designated zone of influence.
None other than of natural origin.
None resulting in obvious discoloration of the surface
						  water outside of any designated zone of influence.
Suspended and settleable
						  solids
None in concentrations or combinations which would
						  impair designated uses; none aesthetically objectionable; none which would
						  significantly alter the physical or chemical composition of the bottom; none
						  which would adversely impact aquatic organisms living in or on the bottom
						  substrate.
None in concentrations or combinations which would
						  impair designated uses; none aesthetically objectionable; none which would
						  significantly alter the physical or chemical composition of the bottom; none
						  which would adversely impact aquatic organisms living in or on the bottom
						  substrate.
None in concentrations or combinations which would
						  impair the most sensitive designated use; none aesthetically objectionable;
						  none which would significantly alter the physical or chemical composition of
						  the bottom; and none which would adversely impact aquatic organisms living in
						  or on the bottom sediments; shall not exceed 10 mg/l over ambient
						  concentrations.
None other than of natural origin.
None in concentrations or combinations which would
						  impair the designated uses; none aesthetically objectionable; none which would
						  significantly alter the physical or chemical composition of bottom sediments;
						  none which would adversely impact organisms living in or on the bottom
						  sediment.
Silt or sand deposits
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, construction activity or dredging
						  activity or discharge of dredged or fill materials provided all reasonable
						  controls or Best Management Practices are used in such activities and all
						  designated uses are protected and maintained.
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, construction activity, dredging
						  activity or the discharge of dredged or fill materials provided all reasonable
						  controls or Best Management Practices are used in such activities and all
						  designated uses are protected and maintained.
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, construction activity, dredging
						  activity or discharge of dredged or fill materials provided all reasonable
						  controls or Best Management Practices are used in such activities and all
						  designated uses are protected and maintained.
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, construction activity, dredging
						  activity or the discharge of dredged or fill materials provided all reasonable
						  controls or Best Management Practices are used in such activities and all
						  designated uses are protected and maintained.
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, construction activity, dredging
						  activity or discharge of dredged or fill materials provided all reasonable
						  controls or Best Management Practices are used in such activities and all
						  designated uses are protected and maintained.
Turbidity
Shall not exceed 5 NTU over ambient levels and none
						  exceeding levels necessary to protect and maintain all designated uses. All
						  reasonable controls or Best Management Practices are to be used to control
						  turbidity.
Shall not exceed 5 NTU over ambient levels and none
						  exceeding levels necessary to protect and maintain all designated uses. All
						  reasonable controls or Best Management Practices are to be used to control
						  turbidity.
Shall not exceed 5 NTU over ambient levels and none
						  exceeding levels necessary to protect and maintain all designated uses. All
						  reasonable controls or Best Management Practices are to be used to control
						  turbidity.
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, or construction activity, dredging
						  activity or discharge of dredged or fill materials provided all reasonable
						  controls and Best Management Practices are used to control turbidity and none
						  exceeding levels necessary to protect and maintain all designated uses.
None other than of natural origin except as may result
						  from normal agricultural, road maintenance, or construction activity, or
						  discharge from a waste treatment facility providing appropriate treatment,
						  dredging activity or discharge of dredged or fill materials provided all
						  reasonable controls and Best Management Practices are used to control turbidity
						  and none exceeding levels necessary to protect and maintain all designated
						  uses.
Indicator bacteria
See Table 2A of this section.
See Table 2A of this section.
See Table 2A of this section.
See Table 2B of this section.
See Table 2B of this section.
Taste and Odor
None other than of natural origin.
None other than of natural origin.
None that would impair any uses specifically assigned
						  to this Class.
As naturally occurs.
As naturally occurs. None that would impair any uses
						  specifically assigned to this Class.
pH
As naturally occurs.
As naturally occurs.
6.5 - 8.0
6.8 - 8.5
6.8 - 8.5
Allowable Temperature
						  Increase
There shall be no changes from natural conditions that
						  would impair any existing or designated uses assigned to this Class and in no
						  case exceed 85o F, or in any case raise the
						  temperature of surface water more than 4o F.
There shall be no changes from natural conditions that
						  would impair any existing or designated uses assigned to this Class and, in no
						  case exceed 85o F, or in any case raise the
						  temperature of surface water more than 4o F.
There shall be no changes from natural conditions that
						  would impair any existing or designated uses assigned to this Class and, in no
						  case exceed 85o F, or in any case raise the
						  temperature of surface water more than 4o F.
There shall be no changes from natural conditions that
						  would impair any existing or designated uses assigned to this Class and, in no
						  case exceed 83o F, or in any case raise the
						  temperature of the receiving water more than 4 o F.
						  During the period including July, August and September, the temperature of the
						  receiving water shall not be raised more than 1.5o F
						  unless it can be shown that spawning and growth of indigenous organism will not
						  be significantly affected. The allowable temperature increase resulting from
						  discharges in the estuarine segments of the Housatonic, Connecticut and Thames
						  Rivers shall be consistent with the criteria for the non-tidal segments.
There shall be no changes from natural conditions that
						  would impair any existing or designated uses assigned to this Class and, in no
						  case exceed 83o F, or in any case raise the
						  temperature of the receiving water more than 4o F.
						  During the period including July, August and September, the temperature of the
						  receiving water shall not be raised more than 1.5 o
						  F unless it can be shown that spawning and growth of indigenous
						  organisms will not be significantly affected. The allowable temperature
						  increase resulting from discharges in the estuarine segments of the Housatonic,
						  Connecticut and Thames Rivers shall be consistent with the criteria for the
						  non-tidal segments.
Chemical constituents
None in concentrations or combinations which would be
						  harmful to designated uses. Refer to Table 3 of this section and sections
						  22a-426-4(a)(5);
						  22a-426-4(a)(9); 22a-426-4(a)(9)(B); 22a-426-4(a)(11); 22a-426-4(l);
						  22a-426-4(m); 22a-426-9(a)(3); 22a-426-9(a)(4) and 22a-426-9(a)(5) of the
						  Regulations of Connecticut State Agencies.
Nutrients
The loading of nutrients, principally phosphorus and
						  nitrogen, to any surface water body shall not exceed that which supports
						  maintenance or attainment of designated uses.
The loading of nutrients, principally phosphorus and
						  nitrogen, to any surface water body shall not exceed that which supports
						  maintenance or attainment of designated uses.
The loading of nutrients, principally phosphorus and
						  nitrogen, to any surface water body shall not exceed that which supports
						  maintenance or attainment of designated uses.
The loading of nutrients, principally phosphorus and
						  nitrogen, to any surface water body shall not exceed that which supports
						  maintenance or attainment of designated uses.
The loading of nutrients, principally phosphorus and
						  nitrogen, to any surface water body shall not exceed that which supports
						  maintenance or attainment of designated uses
Sodium
Not to exceed 20 mg/l.
None other than of natural origin.
Biological condition
Sustainable, diverse biological communities of
						  indigenous taxa shall be present. Moderate changes, from natural conditions, in
						  the structure of the biological communities, and minimal changes in ecosystem
						  function may be evident; however, water quality shall be sufficient to sustain
						  a biological condition within the range of Connecticut Biological Condition
						  Gradient Tiers 1-4 as assessed along a 6 tier stressor gradient of Biological
						  Condition Gradient (See section
						  22a-426-5 of the Regulations of
						  Connecticut State Agencies).
Sustainable, diverse biological communities of
						  indigenous taxa shall be present. Moderate changes, from natural conditions, in
						  the structure of the biological communities, and minimal changes in ecosystem
						  function may be evident; however, water quality shall be sufficient to sustain
						  a biological condition within the range of Connecticut Biological Condition
						  Gradient Tiers 1-4 as assessed along a 6 tier stressor gradient of Biological
						  Condition Gradient (See section
						  22a-426-5 of the Regulations of
						  Connecticut State Agencies).
Sustainable, diverse biological communities of
						  indigenous taxa shall be present. Moderate changes, from natural conditions, in
						  the structure of the biological communities, and minimal changes in ecosystem
						  function may be evident; however, water quality shall be sufficient to sustain
						  a biological condition within the range of Connecticut Biological Condition
						  Gradient Tiers 1-4 as assessed along a 6 tier stressor gradient of Biological
						  Condition Gradient (See section
						  22a-426-5 of the Regulations of
						  Connecticut State Agencies).
Sustainable, diverse biological communities of
						  indigenous taxa shall be present. Moderate changes, from natural conditions, in
						  the structure of the biological communities, and minimal changes in ecosystem
						  function may be evident; however, water quality shall be sufficient to sustain
						  a healthy, diverse biological community
Sustainable, diverse biological communities of
						  indigenous taxa shall be present. Moderate changes, from natural conditions, in
						  the structure of the biological communities, and minimal changes in ecosystem
						  function may be evident; however, water quality shall be sufficient to sustain
						  a healthy, diverse biological community
Note 1
Cumulative Dissolved Oxygen exposure parameters:
Dissolved Oxygen conditions in the area affected do not readily lend themselves
				to a single numeric criterion. Aquatic organisms are harmed based on a
				combination of minimum oxygen concentration and duration of the low Dissolved
				Oxygen excursion. The department established exposure allowances based upon EPA
				research and data, for 0.5 mg/l and 0.3 mg/l increment ranges. (See Table A in
				this note.) Given the environmental variability, the department has used a
				minimum Dissolved Oxygen criterion of 3.0 mg/l with an exposure allowance of no
				more than 2 days.
Table A.
Dissolved Oxygen Chronic
						  Cumulative Exposure Criteria for incremental ranges (0.5 mg/l and 0.3 mg/l)
						  applicable to Class SA and SB waters.
Dissolved Oxygen Range (mg/l)
No. of Days Allowed
[LESS THAN] 4.8
[GREATER THAN EQUAL TO] 4.5
30
[LESS THAN] 4.5
[GREATER THAN EQUAL TO] 4.0
14
[LESS THAN] 4.0
[GREATER THAN EQUAL TO] 3.5
7
[LESS THAN] 3.5
[GREATER THAN EQUAL TO] 3.0
2
Because marine systems are variable, Dissolved Oxygen levels
				are unlikely to remain within one of the four incremental ranges presented in
				Table A. Typically, Dissolved Oxygen conditions would fall through a range to a
				minimum and then begin to rebound depending on weather and stratification
				conditions. To account for this, the number of days within each incremental
				Dissolved Oxygen range is pro-rated, as follows: A decimal fraction is
				calculated for each range,
e.g.
, 10.5 days in the 4.5 - 4.8
				mg/l range would produce a decimal fraction of 0.35 (0.35 = 10.5 days/ 30
				days). As long as the sum of those fractions calculated for each range is less
				than 1.0, resource protection goals are maintained for larval
				recruitment.
In cases where data collection yields continuous Dissolved
				Oxygen readings or more frequent sampling results, the data can be interpreted
				using a 0.1 mg/l interval range. The number of allowable days is determined
				using the following method:
DO
i
= 13.0 / (2.80 +
				1.84
e
-0.10
ti
)
where:
DO
i
= allowable Dissolved Oxygen concentration
				(mg/l)
ti = exposure interval duration in
				days
i = exposure interval
However, since most sampling programs do not result in frequent
				readings, a greater interval (presented in Table A) is recommended. Use of a
				larger interval results in a larger sum of fractions and is subsequently a more
				conservative measure of consistency with the Connecticut Water Quality
				Standards.
(2) Indicator
			 bacteria are used to detect the presence of contamination by human or animal
			 wastes. Tables 2A and 2B below provide the criteria for indicator bacteria. Due
			 to the inherent uncertainty involved in sampling and analytically determining
			 bacteria levels, exceedances of water quality criteria for indicator bacteria
			 does not always indicate a water quality problem and therefore should be
			 investigated by means of a sanitary survey or other appropriate means to
			 determine sources of elevated indicator bacteria levels.
Table 2A - Indicator Bacteria - Freshwater
Designated Use
Indicator
Criteria by classification
Drinking water
						  supply(1)
Total Coliform
AA
A
B
SA
SB
Monthly moving average less than 100/100
						  ml
Single sample maximum 500/100 ml
Recreation(2)(3) -
						  Designated swimming(4)
Escherichia coli
Geometric mean less than 126/100 ml
Single sample maximum 235/100 ml
Recreation(2)(3) -
Non Designated
						  Swimming(5)
Escherichia coli
Geometric mean less than 126/100 ml
Single sample maximum 410/100 ml
Recreation(2)(3) -
All other uses
Escherichia coli
Geometric mean less than 126/100 ml
Single sample maximum 576/100 ml
Table 2B - Indicator Bacteria - Saltwater
Designated Use
Indicator
Criteria by classification
AA
A
B
SA
SB
Shell fishing(6) -
						  Direct Consumption
Fecal coliform
Geometric mean less than 14/100 ml
90% of samples less than 31/100 ml
Shell fishing(6) -
Indirect consumption
Fecal coliform
Geometric mean less than 88/100 ml
90% of samples less than 260/100 ml
Recreation - Designated
						  swimming(4)
Enterococci
Geometric mean less than 35/100ml
Single sample maximum 104/100 ml
Recreation -
All other uses
Enterococci
Geometric mean less than 35/100 ml
Single sample maximum 500/100 ml
Notes for Tables 2A and 2B
(1) Criteria applies only at the drinking
			 water supply intake structure.
(2)
			 Criteria for the protection of recreational uses in Class B waters do not apply
			 when disinfection of sewage treatment plant effluents is not required
			 consistent with section
			 22a-426-4(a)(9)(E)
			 of the Regulations of Connecticut State Agencies.
(3) See section
			 22a-426-9(a)(2)
			 of the Regulations of Connecticut State Agencies.
(4) Procedures for monitoring and closure of
			 bathing areas by state and local health authorities are specified in:
Guidelines for Monitoring Bathing Waters and Closure Protocol
,
			 adopted jointly by the Department of Environmental Protection and the
			 Department of Public Health, May 1989, revised April 2003 and updated December
			 2008.
(5) Includes areas otherwise
			 suitable for swimming but which have not been designated by state or local
			 authorities as bathing areas, waters which support tubing, water skiing, or
			 other recreational activities where full body contact is likely.
(6) Criteria are based on utilizing the mTec
			 method as specified in the U.S. Food and Drug Administration National Shellfish
			 Sanitation Program-Model Ordinance (NSSP-MO) document
Guide for the
			 Control of Molluscan Shellfish 2007
.
(3) Discharges to surface waters shall meet
			 the criteria listed for chemical constituents in Table 3 of this section to
			 ensure the particular surface waters support the uses identified for their
			 particular classification and to assure that such discharges do not cause acute
			 or chronic toxicity to freshwater and marine aquatic life, impair the
			 biological integrity of freshwater and marine ecosystems, or create an
			 unacceptable risk to human health.
(4) The Commissioner may amend the numeric
			 criteria for the chemical constituents listed in Table 3 of this section in
			 accordance with the provisions of Chapter 54 of the Connecticut General
			 Statutes and the notice procedures specified in section 22a 426 of the
			 Connecticut General Statutes on his or her own initiative, or upon request of
			 any person or municipality that site-specific water quality criteria be adopted
			 or amended, provided such request is supported by sound scientific and
			 technical evidence demonstrating the following:
(A) Conditions at the specific site differ
			 significantly from those used in establishing the statewide criteria;
(B) The proposed site-specific criteria are
			 sufficiently stringent to protect all existing and designated uses of the water
			 body; and
(C) The proposed
			 site-specific criteria are derived in a manner consistent with sound scientific
			 and technical principles, giving consideration to all applicable federal
			 guidance.
(5) The
			 Commissioner may adopt or amend criteria for any surface water or class of
			 water, in accordance with the provisions of Chapter 54 of the Connecticut
			 General Statutes and the notice procedures specified in section
			 22a-426
			 of the Connecticut General Statutes and in subparagraphs (A), (B), and (C) of
			 subdivision (4) of this subsection, provided such change is supported by sound
			 scientific and technical evidence, and existing and designated uses are fully
			 protected.
Table 3 NUMERICAL WATER QUALITY CRITERIA FOR CHEMICAL
				CONSTITUENTS
Numerical Water Quality Criteria for Chemical
						  Constituents (ug/L)1
Aquatic Life Criteria
						  (2)(3)
Human health Criteria
Freshwater:
Class AA, A & B
Saltwater
Class SA & SB
Class B, SA & SB
						  Waters
Class AA & A Waters
Chemical Constituents
CASRN
Acute4
Chronic5
Acute4
Chronic5
Consumption of Fish
Consumption of Water &
						  Fish
Health
						  Designation6
Inorganics7
Antimony
7440360
640
5.6
TT
Arsenic (total)
7440382
340
150
69
36
0.021
0.011
A
Beryllium
7440417
0.13
0.0077
TT
Cadmium
7440439
1.0
0.125
40
8.8
10,769
5
TT
Chromium (hex)
18540299
16
11
1,100
50
2,019
100
TT
Chromium (tri)
16065831
323
42
1,009,615
100
TT
Copper
7440508
14.3 8
4.8 9
4.8
3.1
1,300
TT
Copper (site-specific)
						  10
7440508
25.7
18.1
1,300
TT
Cyanide (Total)
57125
22
5.20
1
1
140
140
TT
Lead
7439921
30
1.2
210
8.1
15
TT
Mercury (Total)
7439976
1.4
0.77
1.8
0.94
0.051
0.050
TT-HB
Nickel
7440020
260.5
28.9
74
8.2
4,600
610
TT
Selenium (Total)
7782492
20
5
290
71
4,200
50
TT
Silver
7440224
1.02
1.9
107,692
175
TT
Thallium
7440280
0.47
0.24
TT
Zinc
7440666
65
65
90
81
26,000
7,400
TT
Volatiles
Acrolein
107028
3
3
9
6
TT
Acrylonitrile
107131
0.25
0.051
C
Benzene
71432
51
1.2
A
Bromoform
75252
140
4.3
C
Carbon Tetrachloride
56235
1.6
0.23
C
Chlorobenzene
108907
1,600
100
TT
Chlorodibromomethane
124481
13
0.40
C
Chloroethane
75003
2-Chloroethylvinyl Ether
110758
Chloroform
67663
470
5.7
C
Dichlorobromomethane
75274
17
0.55
C
1,1-Dichloroethane
75343
1,2-Dichloroethane
107062
37
0.38
C
1,1-Dichloroethylene
75354
3.2
0.057
C
1,2T-Dichloroethylene
156605
10,000
100
TT
1,2-Dichloropropane
78875
15
0.50
TT
1,3-Dichloropropylene
542756
21
0.34
TT
Ethylbenzene
100414
2,100
530
TT
Methyl Bromide
74839
1,500
47
TT
Methyl Chloride
74873
470
5.7
TT
Methylene Chloride
75092
590
4.6
C
1,1,2,2-Tetrachloroethane
79345
4.0
0.17
C-HB
Tetrachloroethylene
127184
3.3
0.69
TT
Toluene
108883
15,000
1,000
TT
1,1,1-Trichloroethane
71556
1,1,2-Trichloroethane
79005
16
0.59
C
Trichloroethlyene
79016
30
2.5
C
Vinyl Chloride
75014
2.4
0.025
C
GC/MS: Acid Compounds
2-Chlorophenol
95578
150
81
TT
2,4-Dichlorophenol
120832
290
77
TT
2,4-Dimethylphenol
105679
850
380
TT
3-Methyl-4-chlorophenol
59507
2-Methyl-4,6-Dinitrophenol
534521
280
13
TT
2,4-Dinitrophenol
51285
5,300
69
TT
2-Nitrophenol
88755
4-Nitrophenol
100027
Pentachlorophenol
87865
19
15
13
7.9
3.0
0.27
C-HB
Phenol
108952
860,000
10,000
TT
2,4,6-Trichlorophenol
88062
2.4
1.4
C-HB
Base Neutral Compounds
Acenaphthene
83329
6.1
2.7
TT-HB
Acenapthylene
208968
49.2
4.37
C-HB
Anthracene
120127
4.92
0.44
C-HB
Benzidene
92875
0.00020
0.000086
A
Benzo(a)anthracene
56553
0.018
0.0038
C-HB
Benzo(a)pyrene
50328
0.018
0.0038
C-HB
Benzo(b)fluoranthene
205992
0.018
0.0038
C-HB
Benzo(ghi)perylene
191242
4.92
0.44
C-HB
Benzo(k)fluoranthene
207089
0.018
0.0038
C-HB
Bis(2-chloroethoxy)Methane
111911
Bis(2-Chloroethyl)Ether
111444
0.53
0.030
C
Bis(2-Chloroisopropyl)Ether
108601
65,000
1,400
TT
Bis(2-Ethylhexyl)Phthalate
117817
2.2
1.2
C-HB
4-Bromophenylether
101553
Butyl Benzyl Phthalate
85687
1,900
1,500
TT-HB
2-Chloronapthylene
91587
1,600
1,000
TT-HB
4-Chlorophenylphenylether
7005723
Chrysene
218019
0.018
0.0038
C-HB
Dibenzo(a,h)anthracene
53703
0.010
0.0009
C-HB
1,2-Dichlorobenzene
95501
1,300
420
TT-HB
1,3-Dichlorobenzene
541731
960
320
TT-HB
1,4-Dichlorobenzene
106467
190
63
TT-HB
3,3'-Dibenzidenes
91941
0.028
0.021
C-HB
Diethyl Phthalate
84662
44,000
17,000
TT
Dimethyl Phthalate
131113
1,100,000
270,000
TT
Di-n-butyl Phthlate
84742
4,500
2,000
TT-HB
Di-n-octyl Phthalate ester
117840
2,4-Dinitrotoluene
121142
3.4
0.11
C
2,6-Dinitrotoluene
606202
Di-n-ocytyl phthalate
117840
1,2-Diphenylhydrazine
122667
0.20
0.036
C
Fluoranthene
206440
1.28
1.01
C-HB
Fluorene
86737
49.2
4.37
C-HB
Hexachlorobenzene
118741
0.00029
0.00028
C-HB
Hexachlorobutadiene
87683
18
0.44
C-HB
Hexachlorocyclopentadiene
77474
1,100
40
TT-HB
Hexachloroethane
67721
3.3
1.4
C-HB
Indeno (1,2,3-cd) pyrene
193395
0.018
0.0038
C-HB
Isophorone
78591
960
35
TT
Napthalene
91203
20,513
677
TT
Nitrobenzene
98953
690
17
TT
N-Nitrosodimethylamine
62759
3
0.00069
C
N-Nitrosodi-N-propylamine
621647
0.51
0.005
C
N-Nitrosodiphenylamine
86306
6.0
3.3
C
Phenanthrene
85018
49.17
4.37
C-HB
Pyrene
129000
49.17
4.37
C-HB
1,2,4-Trichlorobenzene
120821
70
35
TT
Pesticides
Aldrin
309002
1.50
0.65
0.00005
0.000049
C-HB
Chlordane
57749
1.20
0.0043
0.045
0.004
0.00081
0.00080
C-HB
DDT
50293
0.5511
0.00111
0.06511
0.00111
0.00022
0.00022
C-HB
DDD
72548
0.00031
0.00031
C-HB
DDE
72559
0.00022
0.00022
C-HB
Dieldrin
60571
0.24
0.056
0.355
0.0019
0.000054
0.000052
C
Endosulfan Alpha
959988
0.1112
0.05612
0.01712
0.008712
89
62
TT
Endosulfan Beta
33213659
0.1112
0.05612
0.01712
0.008712
89
62
TT
Endosulfan Sulfate
1031078
89
62
TT
Endrin
72208
0.086
0.036
0.0185
0.0023
0.060
0.059
TT
Endrin Aldehyde
7421934
0.30
0.29
TT
Heptachlor
76448
0.26
0.0038
0.0265
0.0036
0.000079
0.000079
C
Hetachlor epoxide
1024573
0.26
0.0038
0.0265
0.0036
0.000039
0.000039
C
Hexachlorocyclohexane alpha
319846
0.0049
0.0026
C-HB
Hexachlorocyclohexane beta
319857
0.017
0.0091
C-HB
Hexachlorocyclohexane delta
319868
Hexachlorocyclohexane gamma (Lindane)
58899
0.95
0.08
0.063
0.019
TT-HB
Polychlorinated
						  Biphenyls13
0.014
0.03
0.000064
0.000064
C-HB
2,3,7,8-TCDD (Dioxin)
1746016
0.0000000051
0.000000005
C-HB
Toxaphene
8001352
0.73
0.0002
0.21
0.0002
0.00028
0.00028
C-HB
Other Susbstances
Aluminum
7429905
750
87
Ammonia
7664417
*
**
233 15
35 15
Asbestos
1332214
7 Million fibers per liter
A
Chlorine
7782505
19
11
13
7.5
Chloride
16887006
860,000
230,000
*See Table Note 14-A
**See Table Notes 14B & 14C
Table 3 - Notes:
1. The minimum data necessary to determine
			 consistency with Connecticut Water Quality Standards shall be subject to the
			 Commissioner's discretion and may not be limited to or include chemical
			 analysis results for all of the constituents listed in Table 3.
2. Aquatic life criteria for freshwater may
			 be used for saltwater if criteria for saltwater is unavailable.
3. For brackish waters, use the more
			 restrictive of the aquatic life criteria for freshwater and for
			 saltwater.
4. Biological integrity
			 is impaired by an exposure of one hour or longer to a concentration which
			 exceeds the acute criteria more frequently than once every three years on
			 average.
5. Biological integrity is
			 impaired when the four-day average concentration exceeds the chronic criteria
			 more frequently than once every three years on average.
6. The commissioner shall consider the
			 following human health designations in allocating zones of influence for
			 discharges:
A: Class A carcinogen (known human carcinogen)
TT: Threshold Toxicant, not carcinogenic
C: Carcinogenic (probable or possible carcinogen)
HB: High potential to bioaccumulate or bioconcentrate
7. Criteria apply to the dissolved
			 fraction of ambient waters unless otherwise noted.
8. Biological integrity is impaired when the
			 ambient concentration exceeds this value on more than 5% of days in any
			 year.
9. Biological integrity is
			 impaired when the ambient concentration exceeds this value on more than 50% of
			 days in any year.
10. Site-specific
			 criteria for copper apply for the following waters:
Bantam River Litchfield POTW to confluence with Shepaug
				River
Blackberry River Norfolk POTW to confluence with Roaring
				Brook
North Canaan POTW to confluence with Housatonic River
Factory Brook Salisbury POTW to mouth
Five Mile River New Canaan POTW to mouth
Hockanum River Vernon POTW to confluence with Connecticut
				River
Mill Brook Plainfield Village POTW to mouth
Naugatuck River Torrington POTW to confluence with Housatonic
				River
Norwalk River Ridgefield Brook to Branchville
Pequabuck River Plymouth POTW to confluence with Farmington
				River
Pootatuck River Newtown POTW to confluence with the Housatonic
				River
Quinnipiac River Southington POTW to Broadway, North
				Haven
Still River Winsted POTW to confluence with Farmington
				River
Still River Limekiln Brook to confluence with Housatonic
				River
Williams Brook Ledyard POTW to mouth
Willimantic River Stafford Springs POTW to Trout Management
				Area (Willington)
Eagleville Dam to confluence with Shetucket River
11. This criterion applies to DDT
			 and its metabolites (i.e. the total concentration of DDT and its metabolites
			 should not exceed this value).
12.
			 This value was derived from data for endosulfan and is most appropriately
			 applied to the sum of alpha endosulfan and beta endosulfan.
13. Criteria are applicable to total PCB's
			 (e.g. the sum of all congeners or all isomer or homolog or Arochor
			 analyses).
14. Criteria for
			 ammonia, (mg/l as N) vary in response to ambient surface water temperature (T,
			 degrees C) and pH. Biological integrity is considered impaired when:
A The one-hour average concentration of total ammonia
				exceeds:
[0.275/(1+10(7.204-pH))] +
				[39.0/(1+10(pH-7.204))] when salmonids are
				present
Or
[0.411/(1+10(7.204-pH))] +
				[58.4/(1+10(pH-7.204))] when salmonids are
				absent
B The four-day average concentration of total ammonia exceeds
				2.5 times the value obtained from the formula in 14.C. below.
C The 30-day average concentration of total ammonia
				exceeds:
[0.0577/(1+10(7.688-pH))] +
				[2.487/(1+10(pH-7.688))] x [MIN(2.85, 1.45 x
				(10(0.028(25-T)))]
when early life stages are present;
or
[0.0577/(1+10(7.688-pH))] +
				[2.487/(1+10(pH-7.688))] x [1.45 x
				(10(0.028(25-MAX(T,7)))]
when early life stages are absent.
15. Saltwater ammonia criteria are expressed
			 as un-ionized ammonia (NH3). Equivalent total ammonia concentrations are
			 dependent on receiving water temperature, pH, and salinity.
Conversion of un-unionized ammonia concentrations to total
				ammonia (NH3 + NH4+) may be performed using the procedure described in "Ambient
				Water Quality Criteria for Ammonia (Saltwater) - 1989", EPA
				440/5-88-004.