New Hampshire

If you live in Merrimack 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:
2.8
0.3
fewer days this year
Particle Pollution - 24 Hour
Grade: B How is my grade calculated?
Weighted Average: 0.7 Change Since 2000:
0.3
0.7
fewer days this year
Particle Pollution - Annual
Grade: Pass How is my grade calculated?
Design Value 8.5 Change Since 2001:
9.6
8.5
µg/m3
Groups At Risk
Total Population: 146,445 Risks to the population
Pediatric Asthma: 2,747 Risks to people with Asthma
Adult Asthma: 11,789 Risks to people with Asthma
Chronic Bronchitis: 5,083 Risks to people with Chronic Bronchitis
Emphysema: 2,290 Risks to people with Emphysema
Cardiovascular Disease: 39,394 Risks to people with Cardiovascular Disease
Diabetes: 9,187Risks to people with Diabetes
Children Under 18: 31,946 Risks to children and teens
Adults 65 & Over: 20,008 Risks to older adults
Poverty Estimate: 13,282Risks 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 45 for high ozone days out of 277 metropolitan areas
  • Ranked 90 for 24-hour particle pollution out of 277 metropolitan areas
  • Ranked 109 for annual particle pollution out of 277 metropolitan areas

Compare Your Air



High Ozone Days Learn More
Change Since

This County:

Merrimack, NH

Other counties with monitors in this metropolitan area

There are no other counties in this metropolitan area

What is my length? 14
  • Belknap, NH
  • Bristol, MA
  • Essex, MA
  • Hillsborough, NH
  • Kent, RI
  • Middlesex, MA
  • Norfolk, MA
  • Plymouth, MA
  • Providence, RI
  • Rockingham, NH
  • Suffolk, MA
  • Washington, RI
  • Worcester, MA

ABCDFDNCINC
Particle Pollution - 24 Hour Learn More
Change Since

This County:

Merrimack, NH

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:

Merrimack, NH

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
Chronic Bronchitis: Risks to people with Chronic Bronchitis
Emphysema: Risks to people with Emphysema
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

Notes:

(1) INC indicates incomplete monitoring data for all three years. Therefore, those counties are excluded from the grade analysis.
(2) DNC indicates that there is no monitor collecting data in the county.

More about Methodology.