US Cities with Worst Air Quality Overall

Cities with the most polluted air based on 2025 EPA monitoring data. These communities face the greatest health risks from air pollution.

Health Impact

40.9M
People in highly polluted areas
8
Avg unhealthy days per city
2122
Highest AQI recorded
Showing 1–2 of 2 cities
  1. #1

    Indianapolis, IN

    Population: 1,767,321Monitored: 305 days
    B
    Median: 53
    Good:132
    Moderate:169
    Sensitive:2
    Unhealthy:2
    Very Unhealthy:
    Hazardous:
  2. #2

    Evansville, IN

    Population: 204,607Monitored: 305 days
    A-
    Median: 44
    Good:195
    Moderate:110
    Sensitive:
    Unhealthy:
    Very Unhealthy:
    Hazardous:

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