Air Quality Data Information

An air quality or clean air standard is a legal limit that specifies the maximum acceptable level and duration of exposure for a given air pollutant in the outside air. Standards are set to protect the elderly, very young, and chronically sensitive portions of our population. Formally called the National Ambient Air Quality Standards or the California Ambient Air Quality Standards, these standards are set by the state and federal governments to provide an adequate margin of safety in protecting public health and welfare.

Here are the current State & Federal clean air standards.

**THIS IS UNVALIDATED PRELIMINARY DATA AND, THEREFORE, SUBJECT TO CHANGE.**

Hourly data is reported after the end of the hour and is in Pacific Standard Time.