National Air Pollution Surveillance (NAPS) Network is managed cooperatively between Environment Canada and the provinces/territories. There is a clear delineation of roles and responsibilities. These are formalized in a Gazetted Memorandum of Understanding. Provinces and territories may operate additional NAPS-like sites for their own purposes.

Objectives:

• determine the nature and extent of air pollutants;
• provide data for research including effects of air pollution on health;
• determine trends and predict emerging issues;
• verify estimates of emissions and provide a basis for issue management legislation and international agreements; and
• assess the effect of pollutants from local industry and mobile sources on nearby communities.

Stations: 177 sites
Measurements: SO₂, CO, NO₂, O₃, PM_2.5 (speciated), TSP, PM₁₀, VOCs (speciated), OC, EC

Canadian Air and Precipitation Monitoring Network (CAPMoN) is managed by Environment Canada in consultation with provinces/territories. Provinces and territories may run additional CAPMoN-like sites to meet their own needs.

Objectives:

• determine spatial patterns and temporal trends of pollutants related to acid rain and smog;
• provide data for long-range transport model evaluations and terrestrial and aquatic effects research; and
• ensure compatibility of federal, provincial and US measurements.

Stations: 24 sites
Measurements: pH and major inorganic ions in precipitation; PM, PM_2.5 (speciated), PM₁₀, particulate ions, HNO₃, NH₃, SO₂, O₃, NO, NO₂, NOY, PAN

Integrated Atmospheric Deposition Network (IADN) is managed jointly by Environment Canada and the U.S. Environmental Protection Agency.

Objectives:

• determine atmospheric loadings and trends of priority toxic chemicals to the Great Lakes basin;
• make air and precipitation concentration measurements; and
• help determine the sources of those chemicals.

Stations: 9 sites in Canada
Measurements: PCBs, OC pesticides, PAHs

Canadian Atmospheric Mercury Measurement Network (CAMNet) is managed by Environment Canada. The network is relatively new and is still evolving.

Objectives:

• describe spatial and temporal variations in gaseous mercury and mercury in precipitation in Canada;
• assess the relative contributions of dry and wet mercury deposition; and
• provide data for model development and evaluation.

Stations: 12 sites
Measurements: total gaseous mercury, elemental mercury in precipitation

The CORE Network Database is managed by Environment Canada.

Objectives:

• to provide long-term, high quality observations of atmospheric chemicals and radiation, at locations representative of major atmospheric regimes (and geopolitical regions) across Canada.
• to serve as a national facility which maintains standards, provides expertise, serves as a reference network for monitoring and research studies of other jurisdictions and universities, and fulfils international monitoring commitments.
  

Stations: 6 sites
Measurements: greenhouse gases, smog-related gases, aerosols, O₃, VOC's, aldehydes, precipitation, temperature, relative humidity, and PM_(2.5,10)

Baseline Program Network

Objectives:

• determine trends of greenhouse gases over Canada
• support studies to determine the carbon budget over Canada
• determine the impact of aerosols on global warming

Stations: 5 sites in Canada
Measurements: greenhouse gases, aerosol chemistry and physics

Canadian Radiological Monitoring Network (CRMN) is managed and operated by Health Canada. The CRMN is a national network of monitoring stations that routinely collect air, precipitation, external gamma dose, drinking water, atmospheric water vapour, and milk for radioactivity analysis.

AIRNow Monitoring and Information Network is managed and operated by the United States Environmental Protection Agency. It provides forecast and current condition information on five major air pollutants including ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide.