California

If you live in San Mateo County, the air you breathe needs your support.

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: B How is my grade calculated?
Weighted Average: 0.3 Change Since 1996:
0.0
0.3
fewer days this year
Particle Pollution - 24 Hour
Grade: B How is my grade calculated?
Weighted Average: 0.7 Change Since 2000:
3.8
0.7
fewer days this year
Particle Pollution - Annual
Grade: INC How is my grade calculated?
Design Value INC Incomplete data available for this pollutant for this county. Learn More.
Groups At Risk
Total Population: 727,209 Risks to the population
Pediatric Asthma: 11,487 Risks to people with Asthma
Adult Asthma: 47,749 Risks to people with Asthma
COPD: 26,639 Risks to people with COPD
Cardiovascular Disease: 179,196 Risks to people with Cardiovascular Disease
Diabetes: 48,644Risks to people with Diabetes
Children Under 18: 160,452 Risks to children and teens
Adults 65 & Over: 99,011 Risks to older adults
Poverty Estimate: 56,676Risks 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:

San Mateo, 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
  • Contra Costa, CA
  • Marin, CA
  • Napa, CA
  • San Benito, CA
  • San Francisco, CA
  • Santa Clara, CA
  • Santa Cruz, CA
  • Solano, CA
  • Sonoma, CA

ABCDFDNCINC
Particle Pollution - 24 Hour Learn More
Change Since

This County:

San Mateo, 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:

San Mateo, 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.