Best US Cities for Air Quality

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

Showing 1–6 of 6 cities
  1. #1

    St. George, UT

    Population: 148,405Monitored: 304 days
    A-
    Median: 45
    Good Days:216
    Moderate Days:88
    Unhealthy Days:
    Worst Day:97 AQI
  2. #2

    Logan, UT

    Population: 124,449Monitored: 304 days
    B+
    Median: 46
    Good Days:186
    Moderate Days:118
    Unhealthy Days:
    Worst Day:87 AQI
  3. #3

    Ogden, UT

    Population: 630,643Monitored: 305 days
    B+
    Median: 47
    Good Days:187
    Moderate Days:116
    Unhealthy Days:
    Worst Day:119 AQI
  4. #4

    Layton, UT

    Population: 83,286Monitored: 304 days
    B+
    Median: 48
    Good Days:181
    Moderate Days:116
    Unhealthy Days:
    Worst Day:119 AQI
  5. #5

    Provo, UT

    Population: 641,732Monitored: 304 days
    B+
    Median: 49
    Good Days:164
    Moderate Days:139
    Unhealthy Days:
    Worst Day:109 AQI
  6. #6

    Salt Lake City, UT

    Population: 1,183,003Monitored: 305 days
    B
    Median: 54
    Good Days:113
    Moderate Days:177
    Unhealthy Days:
    Worst Day:175 AQI