Air quality in San Marcos

Fair

Air Quality Index

Air quality is acceptable. Extremely sensitive people may experience minor symptoms.

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PM2.5 11.9 µg/m³

PM10 13.3 µg/m³

NO₂ 6 µg/m³

O₃ 59 µg/m³

SO₂ 1.9 µg/m³

CO 175 µg/m³