5 US Cities with Cleanest Air and Water

In this article, we will discuss the 5 US cities with cleanest air and water. If you want to read our discussion on the overall environmental conditions in the US, you can go directly to the 25 US Cities with Cleanest Air and Water.

5. Bangor, ME

Population: 31,921

Annual Particle Pollution (2019-2021): 4.4µg/m³

Bangor recorded its annual particle pollution at 4.4µg/m³ as of 2021, making it one of the US cities with cleanest air and water. The city ensures high water quality by treating flood ponds with ozone and ultralight disinfection systems, as well as chloramines.

4. Wilmington, NC

Population: 291,833

Annual Particle Pollution (2019-2021): 4.1µg/m³

Wilmington has good air quality due to its coastal location and efforts to reduce pollution. The city prioritizes water quality by conducting regular tests. In recent reports, 56 contaminants were detected in the water; however, none of them exceeded federal water drinking standards set by the EPA.

3. Cheyenne, WY

Population: 100,863

Annual Particle Pollution (2019-2021): 4.1µg/m³

Cheyenne often benefits from clean air quality due to its location in the open spaces of Wyoming. Overall, 70% of water in the city comes from mountain streams. This water undergoes testing throughout the year due to in-line instruments. The contaminants detected in the 2022 water quality report met the EPA’s drinking water guidelines.

2. Urban Honolulu, HI

Population: 1,000,890

Annual Particle Pollution (2019-2021): 3.7µg/m³

Water Quality Score: 72.4

Urban Honolulu has generally good air quality, with fresh Pacific Ocean breezes contributing to clean air. The city sources its water from underground. The pH value for its inland stream is 5.5-8.0, while for open coastal, it ranges from 7.0 to 8.1.

1. Kahului, HI

Population: 28,219

Annual Particle Pollution (2019-2021): 3.7µg/m³

Kahului benefits from clean air quality due to its oceanfront location and trade winds that promote fresh air. The city maintains high water quality standards, with a pH value ranging from 7.3 to 7.9.

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