Legislation Explorer | UNEP Law and Environment Assistance Platform

Search Global Air Quality Laws

PM2.5 (10 μg/m3 annual mean 25 μg/m3 24-hour mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
PM10 (20 μg/m3 annual mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
PM10 (50 μg/m3 24-hour mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
Ozone (100 μg/m3 8-hour mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
NO2 (40 μg/m3 annual mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
NO2 (200 μg/m3 1-hour mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
SO2 (20 μg/m3 24-hour mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
SO2 (500 μg/m3 10-minute mean)
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Compliant with WHO guideline
- Weaker than WHO guideline
Newly acknowledged pollutants
The WHO Air quality guidelines are a set of evidence-based recommendations of limit values for specific air pollutants developed to help countries achieve air quality that protects public health. The first release of the guidelines was in 1987. Since then, several updated versions have appeared. This toolkit currently assesses countries against the 2005 guideline values (see here). The guidelines were updated more recently in 2021 (see here) and the legislation and policies presented in this toolkit will in the future be reassessed against these updated values.
- Yes

Showing 271 - 279 of 279 results

Legislation

| 1973 |

Argentina

Ley Nº 20.284 - Ley sobre contaminación atmosférica.

La presente Ley, cuya finalidad es prevenir la contaminación atmosférica, establece normas que deberán aplicarse a todas las fuentes capaces de producir contaminación atmósferica ubicadas en jurisdicción federal y en la de las provincias que adhieran a la misma. El texto consta de los siguientes capítulos: (I) Generalidades; (II) De las Normas de Calidad y de los Niveles Máximos de Emisión; (III)...

Keywords

Carbon monoxide, Sulphur dioxide, Air pollution, Nitrogen monoxide, Nitrogen dioxide, Nitrogen oxides, Air quality monitoring

Legislation

| 1972 |

Canada

Environment Quality Act (R.S.Q., c. Q-2).

The present Act lays down provisions pertaining to the quality of the environment, At the outset the Act contains a definition clause relating to various terms therein employed, such as “water”, “soil”, “atmosphere”, “environment”, “pollution”, “source of contamination”. Section 2 deals with the functions of the Minister of Sustainable Development, Environment and Parks. For example, he may...

Keywords

Legislation, Zones, Zoning, Industrial sources, Air pollution, Permitting, Concentration-based standards, Concentrations, Compliance, Environmental impact assessments, Air quality monitoring, Monitoring stations, Public health, Pollutants, Inspection, Substantive human rights

Regulation

| 1971 |

United States of America

National Primary and Secondary Ambient Air Quality Standards (Code of Federal Regulations (CFR) Title 40, Part 50)

Keywords

Primary and secondary ambient air quality standards, Legislation

Legislation | 1970 |

Canada

Guidance Document on Achievement Determination for Canadian Ambient Air Quality Standards for Sulphur Dioxide (2020)

This Guidance Document provides information, methodologies, criteria and procedures for reporting on air quality standards for Sulphur Dioxide

Keywords

Ambient air quality standards, Nitrogen dioxide, Sulphur dioxide, Concentrations, Zones, Zoning, Monitoring stations, Air quality standards, Air quality, Air quality monitoring, Air pollution, Pollutants, Industrial sources, Allowed exceedances, Ambient air, Air sheds, Mobile point sources, Legislation, Nitrogen monoxide, Stakeholders, Transboundary air pollution

Legislation | 1970 |

United States of America

Clean Air Act, 1970

United States Clean Air Act, 1970 Act 42 of 1970 Commencement date unknown [This is the version of this document at 4 July 2025.] Title I — Air pollution prevention and control Part A – Air quality and emission limitations 101. Findings and purposes (a) The Congress finds— (1) that the predominant part of the Nation's population is located in its rapidly expanding metropolitan and other urban...

Miscellaneous

Malaysia

New Malaysia Ambient Air Quality Standard

Keywords

Ambient air quality standards, PM10, Sulphur dioxide, Pollutants, Nitrogen dioxide, PM2.5, Carbon monoxide

Miscellaneous

Mongolia

Mongolia Standard MNS 4585:2016

Keywords

Air quality monitoring, Air quality, Legislation, Industrial sources, Concentrations, Carbon monoxide, Air pollution, Particulate matter, Monitoring stations, Zones, Zoning, Pollutants, Sulphur dioxide, Nitrogen dioxide, Nitrogen monoxide, Ozone, PM10, PM2.5

Miscellaneous

Nepal

National Ambient Air Quality Standards 2012 (NAAQS)

Keywords

Ambient air quality standards

Regulation

Senegal

NS-05-62 (Sénégal) - Valeurs limites de la qualité de l’air pour le Sénégal et l’OMS

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Search Global Air Quality Laws

Year

Ambient Air Quality Standards

Responsibility for air quality standards

Indoor Air Quality Standards

Type of instrument

Nature of legal obligations

Exceedances

Compliance with WHO Air Quality Guidelines (2005)

Legal requirement to monitor

Procedural and substantive rights

Legal coordination of policy to achieve AAQS

Enforcement mechanisms

Provisions for transboundary air pollution

Search Global Air Quality Laws

Country

UN regional group

Year

Ambient Air Quality Standards

Responsibility for air quality standards

Indoor Air Quality Standards

Type of instrument

Nature of legal obligations

Exceedances

Compliance with WHO Air Quality Guidelines (2005)

Legal requirement to monitor

Procedural and substantive rights

Legal coordination of policy to achieve AAQS

Enforcement mechanisms

Provisions for transboundary air pollution