Median AQI
24
Good
Georgia · County air quality · 2025
Charlton County, Georgia
Median AQI 24 (Good). 79.0% of monitored days rated Good, direct from EPA Air Quality System stations.
- 24
- Median AQI
- 79.0%
- Good-air days
- 0
- Unhealthy days
- 49%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Charlton County's air is good on balance, more polluted than the median US county, a median AQI of 24 with 79.0% of 19 monitored days in the Good band, driven mainly by PM2.5.
- 24
- median AQI · Good
- 79.0%
- days rated Good
- PM2.5
- main pollutant
- 49%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 61.
Data updated July 2026
- Good · 15 d · 78.9%
- Moderate · 4 d · 21.1%
How did Charlton County's air break down in 2025?
Across 19 monitored days, 15 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 61 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 19 days monitored. Median AQI: 24 (Good).
Insights: Charlton County, Georgia. EPA monitors recorded a median Air Quality Index of 24 across 19 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 15 (79%) fell in the Good band (AQI 0–50), 4 (21%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 55, while the worst single-day peak hit 61 (Moderate). Residents averaged about 23.7 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (19 days). Across the 2020–2025 trend window, good days shifted by -96 and the median AQI moved -2 points, placing the multi-year trajectory at worsening. The worst single reading over the 2020–2025 window was AQI 61, moderate but never Unhealthy. Nearby counties show comparable readings: Bibb (49.5% good, AQI 51); Chatham (66.7% good, AQI 44); Clarke (66.7% good, AQI 44); Clayton (53.1% good, AQI 49); Cobb (92.5% good, AQI 36); Coffee (69.1% good, AQI 44).
Air Quality Summary
Good Days
79.0%
15 of 19 monitored days
4.0pp vs 75% target
Max AQI Recorded
61
Moderate
Health Grade
Good
90th-pct AQI 55
Charlton County, Good days share 79.0%
National avg
Share of monitored days at AQI 0-50 (Good band).
Charlton County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 19 monitored days across EPA AQI categories.
Good
15
79%
Moderate
4
21%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Charlton County.
- PM2.5 · 19 days · 100.0%
Health Impact Assessment
Good
Charlton County's air quality is rated Good based on 79.0% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 79.0% of monitored days in 2025, with a median AQI of 24. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 19 of 19 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Charlton County. Best year: 2021 (118 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 111 | 8 | 1 | 0 | 26 | 139 |
| 2021 | 118 | 3 | 0 | 0 | 25 | 56 |
| 2022 | 117 | 5 | 0 | 0 | 26 | 76 |
| 2023 | 109 | 11 | 0 | 0 | 27 | 74 |
| 2024 | 109 | 7 | 0 | 0 | 27 | 81 |
| 2025 | 15 | 4 | 0 | 0 | 24 | 61 |
How does Charlton County compare?
How Charlton County compares
Good-day share better than US avg
Charlton County 79.0%
Bibb County, Georgia 49.5%
US average 76.5%
Median AQI better than US avg
Charlton County 24
Bibb County, Georgia 51
US average 38
Unhealthy days / yr about average
Charlton County 0
Bibb County, Georgia 0
US average 0
Other Counties in Georgia
Air quality comparison for nearby counties in Georgia.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Charlton County.
Alamosa County, Colorado
AQI 24 · 90.8% good
Anchorage County, Alaska
AQI 24 · 80.8% good
Crook County, Oregon
AQI 24 · 80.7% good
Culberson County, Texas
AQI 24 · 80.0% good
Kootenai County, Idaho
AQI 24 · 88.4% good
Lake County, Oregon
AQI 24 · 82.8% good
What Charlton County's air means for you
The air here stays in the breathable range year-round, with PM2.5 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 24 means for exposure. Health guidance
- See how Charlton County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Charlton County with its Georgia neighbours before drawing a conclusion about the region. All of Georgia
Based on 19 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Charlton County, Georgia? ▼
Charlton County has a median Air Quality Index (AQI) of 24, rated "Good." 79.0% of monitored days (15 out of 19) had good air quality in 2025.
What is the main pollutant in Charlton County? ▼
The primary pollutant in Charlton County is Fine Particles (PM2.5), which was the main AQI driver on 19 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Charlton County have? ▼
In 2025, Charlton County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 61.
Is the air quality in Charlton County getting better or worse? ▼
Air quality in Charlton County is worsening based on 5-year trends (2020-2025). Best year: 2021 with 118 good days. Worst year: 2025 with 15 good days.
What does AQI 24 mean for health? ▼
Charlton County's median AQI of 24 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Charlton County compare to other counties in Georgia? ▼
Charlton County has 79.0% good air days. Nearby counties in Georgia: Bibb (49.5% good), Chatham (66.7% good), Clarke (66.7% good), Clayton (53.1% good), Cobb (92.5% good), Coffee (69.1% good).
What is the 90th percentile AQI in Charlton County? ▼
The 90th percentile AQI for Charlton County is 55, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 61 (Moderate).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.
Every figure on PlainAir 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.