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\nEPA Criteria Pollutants
The EPA has identified six pollutants as \u201ccriteria\u201d 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.
Polycyclic Aromatic Hydrocarbons (PAHs)
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