Air Quality Conditions

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Visalia, California
Updated: Tuesday, March 19 2019 - 6:40 PM PDT


Primary Pollutants
Ozone (O3), in parts per billion (ppb)
Fine Particulate Matter (PM 2.5), in micrograms per cubic meter (μg/m3)

Pollutant Type Air Quality Level Latest Concentration
Ozone Good 51 ppb  

AQI Concentration chart

Air Quality Maps

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Today's AQI Forecast

Hourly AQI (combined PM and Ozone)

Air Quality Index
Levels of Health Concern
Good 0-50 Air quality is considered satisfactory, and air pollution poses little or no risk.
Moderate 51-100 Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Unhealthy for
Sensitive Groups
101-150 Members of sensitive groups may experience health effects. The general public is not likely to be affected.
Unhealthy 151-200 Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
Very Unhealthy 201-300 Health alert: everyone may experience more serious health effects.
Hazardous > 300 Health warnings of emergency conditions. The entire population is more likely to be affected.