Montana

If you live in Lewis and Clark 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: INC How is my grade calculated?
Weighted Average INC Incomplete data available for this pollutant for this county. Learn More.
Particle Pollution - 24 Hour
Grade: F How is my grade calculated?
Weighted Average: 8.7 Change Since 2000:
3.7
8.7
fewer days this year
Particle Pollution - Annual
Grade: Pass How is my grade calculated?
Design Value 8.9 Change Since 2000:
8.6
8.9
µg/m3
Groups At Risk
Total Population: 64,876 Risks to the population
Pediatric Asthma: 1,094 Risks to people with Asthma
Adult Asthma: 4,780 Risks to people with Asthma
COPD: 3,097 Risks to people with COPD
Cardiovascular Disease: 4,193 Risks to people with Cardiovascular Disease
Diabetes: 3,671Risks to people with Diabetes
Children Under 18: 14,289 Risks to children and teens
Adults 65 & Over: 9,626 Risks to older adults
Poverty Estimate: 7,101Risks 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.


Compare Your Air



High Ozone Days Learn More
Change Since

This County:

Lewis and Clark, MT

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

What is my length? 2
  • Jefferson, MT

ABCDFDNCINC
Particle Pollution - 24 Hour Learn More
Change Since

This County:

Lewis and Clark, MT

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:

Lewis and Clark, MT

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.