California

If you live in Contra Costa County, the air you breathe may put your health at risk.

Ozone

Particle Pollution 24-hour

Particle Pollution Annual

You can make a difference in the air that you breathe.

Tell your friends about the air where you live.

High Ozone Days
Ozone Grade: F How is my grade calculated?
Weighted Average: 3.3 Change Since 1996:
10.8
3.3
fewer days this year
Particle Pollution - 24 Hour
Grade: C How is my grade calculated?
Weighted Average: 1.7 Change Since 2000:
14.3
1.7
fewer days this year
Particle Pollution - Annual
Grade: Pass How is my grade calculated?
Design Value 7.8 Change Since 2000:
11.3
7.8
µg/m3
Groups At Risk
Total Population: 1,066,096 Risks to the population
Pediatric Asthma: 18,633 Risks to people with Asthma
Adult Asthma: 67,901 Risks to people with Asthma
COPD: 37,862 Risks to people with COPD
Cardiovascular Disease: 255,179 Risks to people with Cardiovascular Disease
Diabetes: 69,371Risks to people with Diabetes
Children Under 18: 260,264 Risks to children and teens
Adults 65 & Over: 136,467 Risks to older adults
Poverty Estimate: 125,467Risks to people with low incomes

The air you breathe needs your support.

You can make a difference in the air that you breathe.

Tell your friends about the air where you live.

  • Ranked 51 for high ozone days out of 277 metropolitan areas
  • Ranked 29 for 24-hour particle pollution out of 277 metropolitan areas
  • Ranked 125 for annual particle pollution out of 277 metropolitan areas

Compare Your Air



High Ozone Days Learn More
Change Since

This County:

Contra Costa, CA

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

What is my length? 11
  • Alameda, CA
  • Marin, CA
  • Napa, CA
  • San Benito, CA
  • San Francisco, CA
  • San Mateo, CA
  • Santa Clara, CA
  • Santa Cruz, CA
  • Solano, CA
  • Sonoma, CA

ABCDFDNCINC
Particle Pollution - 24 Hour Learn More
Change Since

This County:

Contra Costa, CA

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

ABCDFDNCINC
Particle Pollution - Annual Learn More
Change Since

This County:

Contra Costa, CA

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

PASSFAILDNCINC
Groups At Risk
Total Population: Risks to the population
Pediatric Asthma: Risks to people with Asthma
Adult Asthma: Risks to people with Asthma
COPD: Risks to people with COPD
Cardiovascular Disease: Risks to people with Cardiovascular Disease
Diabetes: Risks to people with Diabetes
Children Under 18: Risks to children and teens
Adults 65 & Over: Risks to older adults
Poverty Estimate: Risks to people with low incomes

More about Methodology.