California Air Quality Standards

Like the federal goverment, the state of California sets ambient air quality standards that local air districts like Yolo-Solano AQMD are required to meet. Of the 10 air pollutants for which there are state standards, Yolo-Solano meets eight. The District does not currently meet the state’s particulate pollution or ground-level ozone standards.

See more info on the state standards from ARB »

Triennial Report

The California Clean Air Act requires district that do not meet the ozone standard to adopt an Air Quality Attainment Plan and to submit progress reports to the California Air Resources Board (ARB) every three years.

The original District plan was adopted in 1992.  This most recent plan update covers the years 2012 -2014.  The document summarizes emission trends over this time period, forecasts future emissions, and reviews efforts made by the District to improve air quality.

A public workshop was held in April 2016. The Board of Directors will consider the matter at a future date.

See the draft Triennial Plan Update »

The Yolo-Solano AQMD Board of Directors adopted its 2012 Triennial Assessment and Plan Update on April 10, 2013. The report assesses air quality data from 2009-2011 and includes a list of control measures the District may take to ensure the state standard for ozone is reached.

Download the report »