Air Pollutants

EPA Criteria Pollutants
The EPA has identified six pollutants as "criteria" air pollutants because it regulates them by developing human health-based and/or environmentally-based criteria (science-based guidelines) for setting permissible levels. These six pollutants are carbon monoxide, lead, nitrogen oxides, ground-level ozone, particle pollution (often referred to as particulate matter), and sulfur oxides.

Carbon Monoxide

Lead

Nitrogen Oxides

Ozone

Particulate Matter

Sulfur Dioxide

Other Air Pollutants

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