Particle Pollution - 24 Hour Learn More Grade: C How is my grade calculated? Weighted Average: 2.0 Change Since 2000:
3.2
2.0
fewer days this year
Particle Pollution - Annual Learn More Grade: Pass How is my grade calculated? Design Value 8.1 Change Since 2000:
9.0
8.1
µg/m3
Groups At Risk Learn More Total Population: 766,135 Risks to the population Pediatric Asthma: 12,785 Risks to people with Asthma Adult Asthma: 70,898 Risks to people with Asthma COPD: 36,499 Risks to people with COPD Cardiovascular Disease: 46,807 Risks to people with Cardiovascular Disease Diabetes: 49,315Risks to people with Diabetes Children Under 18: 152,725 Risks to children and teens Adults 65 & Over: 88,674 Risks to older adults Poverty Estimate: 137,021Risks to people with low incomes

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  • Ranked 163 for high ozone days out of 220 metropolitan areas
  • Ranked 28 for 24-hour particle pollution out of 220 metropolitan areas
  • Ranked 139 for annual particle pollution out of 220 metropolitan areas

Compare Your Air



High Ozone Days Learn More
Change Since

This County:

Multnomah, OR

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

  • Benton, OR
  • Clackamas, OR
  • Clark, WA
  • Columbia, OR
  • Cowlitz, WA
  • Linn, OR
  • Marion, OR
  • Multnomah, OR
  • Polk, OR
  • Skamania, WA
  • Washington, OR
  • Yamhill, OR

ABCDFDNCINC
Particle Pollution - 24 Hour Learn More
Change Since

This County:

Multnomah, OR

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

  • Benton, OR
  • Clackamas, OR
  • Clark, WA
  • Columbia, OR
  • Cowlitz, WA
  • Linn, OR
  • Marion, OR
  • Multnomah, OR
  • Polk, OR
  • Skamania, WA
  • Washington, OR
  • Yamhill, OR

ABCDFDNCINC
Particle Pollution - Annual Learn More
Change Since

This County:

Multnomah, OR

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

  • Benton, OR
  • Clackamas, OR
  • Clark, WA
  • Columbia, OR
  • Cowlitz, WA
  • Linn, OR
  • Marion, OR
  • Multnomah, OR
  • Polk, OR
  • Skamania, WA
  • Washington, OR
  • Yamhill, OR

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.

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