The California Air Resources Board (CARB) maintains designation maps showing state and federal area designations for criteria pollutants throughout California.  These maps identify whether an area meets (attains) or does not meet (is designated nonattainment for) established air quality standards and are updated annually for state area designations in accordance with California Health and Safety Code Section 39608.

CARB establishes state area designations for ten criteria pollutants: ozone, particulate matter (PM₁₀), fine particulate matter (PM₂.₅), carbon monoxide, nitrogen dioxide, sulfur dioxide, sulfates, lead, hydrogen sulfide, and visibility-reducing particles.

To view California’s current attainment designations, please visit CARB’s Designation Maps.  For information on current state and federal ambient air quality standards, please review the Ambient Air Quality Standards table.

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