State of the Air 2018

The American Lung Association State of the Air 2018 report grades U.S. counties on harmful ozone (smog) and particle pollution recorded over a three-year period, and details trends for metropolitan areas over the past decade. The report ranks also both the cleanest and most polluted areas in the country.

While the State of the Air 2018 report shows progress for our state, it serves to remind us of our struggle to breathe healthy air, as more than 90 percent of Californians live in counties affected with unhealthy air during certain parts of the year.

State of the Air 2018 Press Release
English | Spanish

State of the Air 2018 Report
Download the State of the Air 2018
View the State of the Air 2018 - California Overview
View the Methodology

Check out these key findings:
California Grade Summary
Most Polluted Metro Areas in California
Californians at Risk Due to Air Pollution

Regional Fact Sheets and Trend Charts
Greater Bay Area: Fact sheet
Greater Sacramento Area: Fact Sheet
San Joaquin Valley: Fact Sheet
Southern California: Fact Sheet
San Diego/Imperial Counties: Fact Sheet

Ozone Pollution Fact Sheets
Particle Pollution Fact Sheets

Daily Particle Pollution Trend Charts by Metro Area
Annual Particle Pollution Trend Charts by Metro Area
Ozone Pollution Trend Charts by Metro Area

Maps highlighting State of the Air 2018 report grades for annual particle pollution, daily particle pollution, and ozone pollution.

View the nationwide American Lung Association State of the Air 2018 report at www.stateoftheair.org to learn more about ozone and particle pollution, and to see how your community ranks.

For media inquiries, contact: Ryan Endean, 916-585-7666 or [email protected]

English and Spanish-language spokespeople are available for interviews.