State air quality · 2025

Georgia Air Quality Ranking

Across 26 monitored counties, the typical county in Georgia posts a median AQI of 43 (Good) and 65.0% of monitored days were rated Good, from EPA AQS.

43
Avg median AQI
65.0%
Good-air days
26
Counties monitored
13%
Cleaner than US states

Georgia's typical county median AQI is 43 (Good) across 26 monitored counties

According to the U.S. EPA Air Quality System, Georgia monitors 26 counties with a day-weighted Good-day share of 65.0%. Cleanest: Dawson County (95.1% Good). Most polluted: Bibb County (42.7%). These are annual summaries, not live AirNow readings.

Data source EPA Air Quality System (AQS)

Cleaner than US states
Georgia's day-weighted Good-day share of 65.0% places it cleaner than 13% of US states.
In-state spread
Within Georgia, Chattooga County leads at 96.3% Good days while Bibb County sits at 42.7% across 26 monitored counties.
2024→2025 release
Georgia's Good-day share moved -0.6 points vs the 2024 EPA annual release.
Typical median AQI
Typical median AQI: 43

Verify with AirNow → · EPA AQS →

EPA state monitoring brief

AQS state key GEORGIA

Georgia · 2025 EPA AQS · 26 counties · med AQI 43 · 65.0% Good · Dawson→Bibb spread

  • GOOD 43 Median AQI · Good
  • SHARE 65.0% Good-day share
  • COUNT 26 Counties monitored
  • UNH 4 Unhealthy+ days
  • RANK 13% Cleaner than states
  • PM25 66.5% Main pollutant share

Good-day share peers

District of Columbia66%Texas65.6%Utah65.4%Georgia (this)65%
Good-day share neighbourhood · nearest ABS peers vs Georgia

Georgia's 65.0% Good-day share is cleaner than 13% of monitored US states; Dawson and Bibb County bracket the in-state range. Open Chattooga County →

According to EPA AQS annual summaries on PlainAirData, Georgia ranks #50 of 52 by day-weighted good-day share (65.0%) and #48 by mean county median AQI (43.3). Hawaii is #1 of 52 by day-weighted good-day share (93.8% of monitored days) at mean county median-AQI #4 (27.3) ≠ Alaska #1 lowest mean county median AQI (20.3) at good-day share #8 (84.4%).

Data updated August 2026

What changed, what drives it, and how thick is the sample

Three derived views WPR-style word count does not substitute for: release-over-release movement from county annual rows, the EPA main-pollutant day mix, and how many counties sit below the 100-day ranking floor.

Release change

65.0%

Good-day share in 2025, down 0.6 percentage points vs 2024. County-mean median AQI 43, within half a point of the 2024 county-mean median.

Pollutant mix

PM2.5

Main driver on 66.5% of pollutant-assigned days.

  • PM2.5 66.5%
  • Ozone 33.0%
  • NO2 0.5%

Monitoring coverage

306

Average monitored days per county in the latest release. 1 of 26 counties sit below the 100-day floor used for cleanest/most-polluted claims.

Counties Monitored

26

Good Days %

65.0%

Avg Median AQI

43

Total Unhealthy Days

4

Best Air Quality

Dawson County

Worst Air Quality

Bibb County

Where Georgia sits nationally

COUNT-derived placement among 52 US states with at least 365 monitored days in the latest county release. Georgia's day-weighted Good-day share is 65.0% - cleaner than 13% of that comparison set.

Georgia Good-day share vs. every US state

Day-weighted share of monitored days in the Good band (AQI 0–50) - EPA AQS annual release

65.0% 13th percentile higher than 13% of 52 US states

0.0%–5.0%: 0 US states (0%). Below this entry. 5.0%–10.0%: 0 US states (0%). Below this entry. 10.0%–15.0%: 0 US states (0%). Below this entry. 15.0%–20.0%: 0 US states (0%). Below this entry. 20.0%–25.0%: 0 US states (0%). Below this entry. 25.0%–30.0%: 0 US states (0%). Below this entry. 30.0%–35.0%: 0 US states (0%). Below this entry. 35.0%–40.0%: 0 US states (0%). Below this entry. 40.0%–45.0%: 0 US states (0%). Below this entry. 45.0%–50.0%: 0 US states (0%). Below this entry. 50.0%–55.0%: 0 US states (0%). Below this entry. 55.0%–60.0%: 0 US states (0%). Below this entry. 60.0%–65.0%: 2 US states (4%). Below this entry. 65.0%–70.0%: 9 US states (17%). This entry sits in this band. 70.0%–75.0%: 11 US states (21%). Above this entry. 75.0%–80.0%: 11 US states (21%). Above this entry. 80.0%–85.0%: 13 US states (25%). Above this entry. 85.0%–90.0%: 5 US states (10%). Above this entry. 90.0%–95.0%: 1 US states (2%). Above this entry. 95.0%–100.0%: 0 US states (0%). Above this entry. 100.0%–105.0%: 0 US states (0%). Above this entry. This state 0.0% 100% every floor-qualified US state, bucketed by value

Each bar is a band; taller bars hold more US states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Environmental Protection Agency, Air Quality System (AQS) · 2025

Which counties in Georgia have the cleanest and most polluted air?

Cleanest counties in Georgia

Share of monitored days rated Good (AQI 0–50)

  1. 1 Chattooga County 96.3%
  2. 2 Dawson County 95.1%
  3. 3 Rockdale County 94.6%
  4. 4 Columbia County 94.2%
  5. 5 Cobb County 93.5%
  6. 6 Sumter County 93.4%
  7. 7 Charlton County 92.6%
  8. 8 Murray County 90.3%
  9. 9 Pike County 88.9%
  10. 10 Douglas County 85.3%
  11. 11 Henry County 75.6%
  12. 12 Glynn County 74.3%

Good-day share · EPA Air Quality System

County Good % Median AQI
Chattooga 96.3% 39
Dawson 95.1% 34
Rockdale 94.6% 36
Columbia 94.2% 36
Cobb 93.5% 35
Sumter 93.4% 38
Charlton 92.6% 27
Murray 90.3% 39
Pike 88.9% 38
Douglas 85.3% 39
Henry 75.6% 39
Glynn 74.3% 41
Floyd 69.7% 38
Coffee 67.7% 44
Houston 61.0% 46
Washington 60.7% 46
Chatham 58.6% 47
DeKalb 58.4% 47
Gwinnett 58.3% 47
Clarke 57.8% 46
Hall 57.7% 46
Dougherty 57.3% 46
Muscogee 54.5% 48
Fulton 54.3% 49
Clayton 54.1% 48
Walker 53.4% 48
Lowndes 51.2% 49
Richmond 46.9% 52
Bibb 42.7% 52

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025. See our methodology for how AQI and median figures are computed.

Coverage: 26 counties in Georgia with active monitoring stations. Unmonitored counties are not represented.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files, aggregated to the state level · 2020–2025

Every figure on PlainAirData is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.

Informational only, not professional advice. Data from EPA AQS. See our disclaimer.