Best US Cities for Air Quality

Ranking of US cities with the cleanest air based on 2025 EPA data.

Showing 1–5 of 5 cities
  1. #1

    Iowa City, IA

    Population: 133,565Monitored: 304 days
    A
    Median: 36
    Good Days:216
    Moderate Days:84
    Unhealthy Days:
    Worst Day:159 AQI
  2. #2

    Cedar Rapids, IA

    Population: 195,323Monitored: 304 days
    A-
    Median: 44
    Good Days:186
    Moderate Days:113
    Unhealthy Days:
    Worst Day:163 AQI
  3. #3

    Davenport, IA

    Population: 281,044Monitored: 305 days
    A-
    Median: 45
    Good Days:182
    Moderate Days:121
    Unhealthy Days:
    Worst Day:159 AQI
  4. #4

    Des Moines, IA

    Population: 570,091Monitored: 304 days
    B+
    Median: 46
    Good Days:178
    Moderate Days:124
    Unhealthy Days:
    Worst Day:136 AQI
  5. #5

    Waterloo, IA

    Population: 119,632Monitored: 304 days
    B+
    Median: 48
    Good Days:172
    Moderate Days:130
    Unhealthy Days:
    Worst Day:158 AQI