Article 1 Objectives
The general aim of this Directive is to define the basic principles of a common strategy to: — define and establish objectives for ambient air quality in the Community designed to avoid, prevent or reduce harmful effects on human health and the environment as a whole, — assess the ambient air quality in Member States on the basis of common methods and criteria, — obtain adequate information on ambient air quality and ensure that it is made available to the public, inter alia by means of alert thresholds, — maintain ambient air quality where it is good and improve it in other cases.
Article 2 Definitions
For the purposes of this Directive: 1. ‘ambient air’ shall mean outdoor air in the troposphere, excluding work places; 2. ‘pollutant’ shall mean any substance introduced directly or indirectly by man into the ambient air and likely to have harmful effects on human health and/or the environment as a whole; 3. ‘level’ shall mean the concentration of a pollutant in ambient air or the deposition thereof on surfaces in a given time; 4. ‘assessment’ shall mean any method used to measure, calculate, predict or estimate the level of a pollutant in the ambient air; 5. ‘limit value’ shall mean a level fixed on the basis of scientific knowledge, with the aim of avoiding, preventing or reducing harmful effects on human health and/or the environment as a whole, to be attained within a given period and not to be exceeded once attained; 6. ‘target value’ shall mean a level fixed with the aim of avoiding more long-term harmful effects on human health and/or the environment as a whole, to be attained where possible over a given period; 7. ‘alert threshold’ shall mean a level beyond which there is a risk to human health from brief exposure and at which immediate steps shall be taken by the Member States as laid down in this Directive; 8. ‘margin of tolerance’ shall mean the percentage of the limit value by which this value may be exceeded subject to the conditions laid down in this Directive; 9. ‘zone’ shall mean part of their territory delimited by the Member States; 10. ‘agglomeration’ shall mean a zone with a population concentration in excess of 250 000 inhabitants or, where the population concentration is 250 000 inhabitants or less, a population density per km 2 which for the Member States justifies the need for ambient air quality to be assessed and managed.
Article 3 Implementation and responsibilities
For the implementation of this Directive, the Member States shall designate at the appropriate levels the competent authorities and bodies responsible for: — implementation of this Directive, — assessment of ambient air quality, — approval of the measuring devices (methods, equipment, networks, laboratories), — ensuring accuracy of measurement by measuring devices and checking the maintenance of such accuracy by those devices, in particular by internal quality controls carried out in accordance, inter alia , with the requirements of European quality assurance standards, — analysis of assessment methods, — coordination on their territory of Community-wide quality assurance programmes organized by the Commission. When they supply it to the Commission, the Member States shall make the information referred to in the first subparagraph available to the public.
Article 4 Setting of the limit values and alert thresholds for ambient air
1. For those pollutants listed in Annex I, the Commission shall submit to the Council proposals for the setting of limit values and, as appropriate, alert thresholds according to the following timetable: — no later than 31 December 1996 for pollutants 1 to 5, — in accordance with Article 8 of Directive 92/72/EEC for ozone, — no later than 31 December 1997 for pollutants 7 and 8, — as soon as possible, and no later than 31 December 1999, for pollutants 9 to 13. In fixing the limit values and, as appropriate, alert thresholds, account shall be taken, by way of example, of the factors laid down in Annex II. Regarding ozone, these proposals will take account of the specific formation mechanisms of this pollutant and, to this end, provision may be made for target values and/or limit values. If a target value fixed for ozone is exceeded, Member States shall inform the Commission of the measures taken in order to attain that value. On the basis of this information the Commission shall evaluate whether additional measures are necessary at Community level and, should the need arise, shall submit proposals to the Council. For other pollutants, the Commission shall submit to the Council proposals for fixing limit values and, as appropriate, alert thresholds if, on the basis of scientific progress and taking into account the criteria laid down in Annex III, it appears necessary to avoid, prevent or reduce the harmful effects of such pollutants on human health and/or the environment as a whole within the Community. 2. The Commission shall be responsible, taking account of the most recent scientific-research data in the epidemiological and environmental fields concerned and of the most recent advances in metrology, for re-examining the elements on which the limit values and alert thresholds referred to in paragraph 1 are based. 3. When limit values and alert thresholds are set, criteria and techniques shall be established for: (a) the measurement to be used in implementing the legislation referred to in paragraph 1: — the location of the sampling points, — the minimum number of sampling points, — the reference measurement and sampling techniques; (a) the measurement to be used in implementing the legislation referred to in paragraph 1: — the location of the sampling points, — the minimum number of sampling points, — the reference measurement and sampling techniques; (b) the use of other techniques for assessing ambient air quality, particularly modelling: — spatial resolution for modelling and objective assessment methods, — reference modelling techniques. (b) the use of other techniques for assessing ambient air quality, particularly modelling: — spatial resolution for modelling and objective assessment methods, — reference modelling techniques. These criteria and techniques shall be established in respect of each pollutant according to the size of agglomerations or to the levels of pollutants in the zones examined. 4. To take into account the actual levels of a given pollutant when setting limit values and the time needed to implement measures for improving the ambient air quality, the Council may also set a temporary margin of tolerance for the limit value. This margin shall be reduced according to procedures to be defined for each pollutant in order to attain the level of the limit value at the latest at the end of a period to be determined for each pollutant when that value is set. 5. In accordance with the Treaty, the Council shall adopt the legislation provided for in paragraph 1 and the provisions laid down in paragraphs 3 and 4. 6. When a Member State takes more stringent measures than those laid down in the provisions referred to in paragraph 5, it shall inform the Commission thereof. 7. When a Member State intends to set limit values or alert thresholds for pollutants not referred to in Annex I and not covered by Community provisions concerning ambient air quality in the Community, it shall inform the Commission thereof in sufficient time. The Commission shall be required to supply, in sufficient time, an answer to the question of the need to act at Community level following the criteria laid down in Annex III.
Article 5 Preliminary assessment of ambient air quality
Member States which do not have representative measurements of the levels of pollutants for all zones and agglomerations shall undertake series of representative measurements, surveys or assessments in order to have the data available in time for implementation of the legislation referred to in Article 4 (1).
Article 6 Assessment of ambient air quality
1. Once limit values and alert thresholds have been set, ambient air quality shall be assessed throughout the territory of the Member States, in accordance with this Article. 2. In accordance with the criteria referred to in Article 4 (3), and in respect of the relevant pollutants under Article 4 (3), measurement is mandatory in the following zones: — agglomerations as defined in Article 2 (10), — zones in which levels are between the limit values and the levels provided for in paragraph 3, and — other zones where levels exceed the limit values. The measures provided for may be supplemented by modelling techniques to provide an adequate level of information on ambient air quality. 3. A combination of measurements and modelling techniques may be used to assess ambient air quality where the levels over a representative period are below a level lower than the limit value, to be determined according to the provisions referred to in Article 4 (5). 4. Where the levels are below a level to be determined according to the provisions referred to in Article 4 (5), the sole use of modelling or objective estimation techniques for assessing levels shall be possible. This provision shall not apply to agglomerations in the case of pollutants for which alert thresholds have been fixed according to the provisions referred to in Article 4 (5). 5. Where pollutants have to be measured, the measurements shall be taken at fixed sites either continuously or by random sampling; the number of measurements shall be sufficiently large to enable the levels observed to be determined.
Article 7 
Improvement of ambient air quality General requirements 1. Member States shall take the necessary measures to ensure compliance with the limit values. 2. Measures taken in order to achieve the aims of this Directive shall: (a) take into account an integrated approach to the protection of air, water and soil; (b) not contravene Community legislation on the protection of safety and health of workers at work; (c) have no significant negative effects on the environment in the other Member States. 3. Member States shall draw up action plans indicating the measures to be taken in the short term where there is a risk of the limit values and/or alert thresholds being exceeded, in order to reduce that risk and to limit the duration of such an occurrence. Such plans may, depending on the individual case, provide for measures to control and, where necessary, suspend activities, including motor-vehicle traffic, which contribute to the limit values being exceeded.
Article 8 Measures applicable in zones where levels are higher than the limit value
1. Member States shall draw up a list of zones and agglomerations in which the levels of one or more pollutants are higher than the limit value plus the margin of tolerance. Where no margin of tolerance has been fixed for a specific pollutant, zones and agglomerations in which the level of that pollutant exceeds the limit value shall be treated in the same way as the zones and agglomerations referred to in the first subparagraph, and paragraphs 3, 4 and 5 shall apply to them. 2. Member States shall draw up a list of zones and agglomerations in which the levels of one or more pollutants are between the limit value and the limit value plus the margin of tolerance. 3. In the zones and agglomerations referred to in paragraph 1, Member States shall take measures to ensure that a plan or programme is prepared or implemented for attaining the limit value within the specific time limit. The said plan or programme, which must be made available to the public, shall incorporate at least the information listed in Annex IV. 4. In the zones and agglomerations referred to in paragraph 1, where the level of more than one pollutant is higher than the limit values, Member States shall provide an integrated plan covering all the pollutants concerned. 5. The Commission shall regularly check the implementation of the plans or programmes submitted under paragraph 3 by examining their progress and the trends in air pollution. 6. When the level of a pollutant exceeds, or is likely to exceed, the limit value plus the margin of tolerance or, as the case may be, the alert threshold following significant pollution originating in another Member State, the Member States concerned shall consult with one another with a view to finding a solution. The Commission may be present at such consultations.
Article 9 Requirements in zones where the levels are lower than the limit value
Member States shall draw up a list of zones and agglomerations in which the levels of pollutants are below the limit values. Member States shall maintain the levels of pollutants in these zones and agglomerations below the limit values and shall endeavour to preserve the best ambient air quality, compatible with sustainable development.
Article 10 Measures applicable in the event of the alert thresholds being exceeded
When the alert thresholds are exceeded, Member States shall undertake to ensure that the necessary steps are taken to inform the public (e.g. by means of radio, television and the press). Member States shall also forward to the Commission on a provisional basis information concerning the levels recorded and the duration of the episode(s) of pollution no later than three months following their occurrence. A list of minimum details to be supplied to the public shall be drawn up together with the alert thresholds.
Article 11 Transmission of information and reports
After adoption by the Council of the first proposal referred to in the first indent of Article 4 (1): 1. Member States shall notify to the Commission the competent authorities, laboratories and bodies referred to in Article 3 and (a) in the zones referred to in Article 8 (1) shall: (i) inform the Commission of the occurrence of levels exceeding the limit value plus the margin of tolerance, of the dates or periods when such levels were observed and the values recorded in the nine-month period after the end of each year. When no margin of tolerance has been fixed for a given pollutant, the zones and agglomerations where the level of such pollutant exceeds the limit value shall be treated in the same way as the zones and agglomerations referred to in the first subparagraph; (ii) inform the Commission of the reasons for each recorded instance, in the nine-month period after the end of each year; (iii) send to the Commission the plans or programmes referred to in Article 8 (3) no later than two years after the end of the year during which the levels were observed; (iv) inform the Commission every three years of the progress of the plan or programme; (b) shall forward to the Commission annually, and no later than nine months after the end of each year, the list of zones and agglomerations referred to in Article 8 (1) and (2) and in Article 9; (c) shall forward fo the Commission every three years within the framework of the sectoral report referred to in Article 4 of Council Directive 91/692/EEC of 23 December 1991 standardizing and rationalizing reports on the implementation of certain Directives relating to the environment ( 9 ), and no later than nine months after the end of each three-year period, information reviewing the levels observed or assessed, as appropriate, in the zones and agglomerations referred to in Article 8 and Article 9; (d) shall inform the Commission of the methods used for the preliminary assessment of air quality provided for in Article 5. 1. Member States shall notify to the Commission the competent authorities, laboratories and bodies referred to in Article 3 and (a) in the zones referred to in Article 8 (1) shall: (i) inform the Commission of the occurrence of levels exceeding the limit value plus the margin of tolerance, of the dates or periods when such levels were observed and the values recorded in the nine-month period after the end of each year. When no margin of tolerance has been fixed for a given pollutant, the zones and agglomerations where the level of such pollutant exceeds the limit value shall be treated in the same way as the zones and agglomerations referred to in the first subparagraph; (ii) inform the Commission of the reasons for each recorded instance, in the nine-month period after the end of each year; (iii) send to the Commission the plans or programmes referred to in Article 8 (3) no later than two years after the end of the year during which the levels were observed; (iv) inform the Commission every three years of the progress of the plan or programme; (a) in the zones referred to in Article 8 (1) shall: (i) inform the Commission of the occurrence of levels exceeding the limit value plus the margin of tolerance, of the dates or periods when such levels were observed and the values recorded in the nine-month period after the end of each year. When no margin of tolerance has been fixed for a given pollutant, the zones and agglomerations where the level of such pollutant exceeds the limit value shall be treated in the same way as the zones and agglomerations referred to in the first subparagraph; (i) inform the Commission of the occurrence of levels exceeding the limit value plus the margin of tolerance, of the dates or periods when such levels were observed and the values recorded in the nine-month period after the end of each year. When no margin of tolerance has been fixed for a given pollutant, the zones and agglomerations where the level of such pollutant exceeds the limit value shall be treated in the same way as the zones and agglomerations referred to in the first subparagraph; (ii) inform the Commission of the reasons for each recorded instance, in the nine-month period after the end of each year; (iii) send to the Commission the plans or programmes referred to in Article 8 (3) no later than two years after the end of the year during which the levels were observed; (iv) inform the Commission every three years of the progress of the plan or programme; (b) shall forward to the Commission annually, and no later than nine months after the end of each year, the list of zones and agglomerations referred to in Article 8 (1) and (2) and in Article 9; (c) shall forward fo the Commission every three years within the framework of the sectoral report referred to in Article 4 of Council Directive 91/692/EEC of 23 December 1991 standardizing and rationalizing reports on the implementation of certain Directives relating to the environment ( 9 ), and no later than nine months after the end of each three-year period, information reviewing the levels observed or assessed, as appropriate, in the zones and agglomerations referred to in Article 8 and Article 9; (d) shall inform the Commission of the methods used for the preliminary assessment of air quality provided for in Article 5. 2. the Commission shall publish: (a) annually, a list of the zones and agglomerations referred to in Article 8 (1); (b) every three years, a report on the ambient air quality in the Community. This report shall show in summary form the information received through a mechanism for the exchange of information between the Commission and the Member States. 2. the Commission shall publish: (a) annually, a list of the zones and agglomerations referred to in Article 8 (1); (b) every three years, a report on the ambient air quality in the Community. This report shall show in summary form the information received through a mechanism for the exchange of information between the Commission and the Member States. 3. the Commission will call upon as necessary the expertise available in the European Environment Agency in drafting the report referred to in paragraph 2 (b).
Article 12 Committee and its functions
1. The detailed arrangements for forwarding the information to be provided under Article 11 shall be adopted in accordance with the procedure referred to in paragraph 3. 2. The Commission shall be assisted by a committee. 3. Where reference is made to this Article, Articles 5 and 7 of Decision 1999/468/EC ( 10 ) shall apply, having regard to the provisions of Article 8 thereof. The period laid down in Article 5(6) of Decision 1999/468/EC shall be set at three months. 4. The Committee shall adopt its rules of procedure.
Article 13 
1. Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with this Directive not later than 18 months after it comes into force with regard to the provisions relating to Articles 1 to 4 and 12 and Annexes I, II, III and IV, and at the latest on the date on which the provisions referred to in Article 4 (5) apply, with regard to the provisions relating to the other Articles. When Member States adopt these measures, they shall contain a reference to this Directive or shall be accompanied by such a reference at the time of their official publication. The procedures for such a reference shall be adopted by Member States. 2. Member States shall communicate to the Commission the text of the main provisions of national law which they adopt in the field covered by this Directive.
Article 14 
This Directive shall enter into force on the day of its publication in the Official Journal of the European Communities .
Article 15 
This Directive is addressed to the Member States.