South Coast AQMD’s AQ-SPEC program evaluates air quality sensors measuring criteria pollutants (PM_2.5, PM₁₀, NO₂, ozone, carbon monoxide), black carbon, ultrafine particles and volatile organic compounds (VOC).

These tests are performed in the field, under controlled conditions in the laboratory, and on mobile platforms. For more information about each test type, please visit the pages below to learn more about how sensors are tested.