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Access Data

Air quality data available for download below are primarily from AB 617 air quality monitoring sites. As AQview continues to expand, monitoring data from a larger variety of sources will be made available here. For technical details about the data available, please review the Data Download Explainer. Further information regarding the types of pollutants measured in each community can be found on our Pollutants in AQview page.

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Note: Records selected for download must not exceed 500,000. Large downloads may take several minutes to complete.

Disclaimer: This download tool only provides preliminary data that have not been verified or extensively quality assured. These data should not be used for any official purposes.