Air Quality Standards

 

Health-Based Ambient Air Quality Standards

An ambient air quality standard sets legal limits on the level of an air pollutant in the outdoor (ambient) air necessary to protect public health. Both the California Air Resources Board (ARB) and the U.S. Environmental Protection Agency (U.S. EPA) are authorized to set ambient air quality standards.

 

Click here to view the state and federal ambient air quality standards - Ambient Air Quality Standards Chart (California and Federal)

 

Ventura County is an attainment area for all standards shown in the “Ambient Air Quality Standards Chart, except the following:

 

 

 

State and Federal Nonattainment Pollutants
Ventura County

Pollutant

Standard

Attainment Status

Ozone

1 Hour

State Nonattainment

8 Hour

State and Federal Nonattainment

Particulate Matter
PM10

24 Hour and Annual Arithmetic Mean

State Nonattainment*

Particulate Matter
PM2.5

Annual Arithmetic Mean
* The state does not make separate designations for different particle size particulate matter, but rather designates an area attainment or nonattainment for particulate matter generally.