California Air Resources Board

Air Quality Data Query Tool

Environmental Quality Maps for California

South Coast Air Quality Management District (SCAQMD)

Current Hourly Air Quality

Historical Data by Year

Environmental Protection Agency (EPA)

Air Quality Index

National Ambient Standards for Criteria Pollutants

The Green Book Nonattainment Areas for Criteria Pollutants

Toxic Release Inventory (TRI)

TRI Listed Chemicals

Superfund Sites National Priorities List

Superfund Sites in California

National Highway Traffic Safety Administration CAFE Standards