Median AQI
51
Moderate
Georgia · County air quality · 2025
Bibb County, Georgia
Median AQI 51 (Moderate). 49.5% of monitored days rated Good, direct from EPA Air Quality System stations.
- 51
- Median AQI
- 49.5%
- Good-air days
- 0
- Unhealthy days
- 6%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Bibb County's air is moderate on balance, among the most polluted counties nationally, a median AQI of 51 with 49.5% of 271 monitored days in the Good band, driven mainly by PM2.5.
- 51
- median AQI · Moderate
- 49.5%
- days rated Good
- PM2.5
- main pollutant
- 6%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 119.
Data updated July 2026
- Good · 134 d · 49.4%
- Moderate · 136 d · 50.2%
- USG · 1 d · 0.4%
How did Bibb County's air break down in 2025?
Across 271 monitored days, 134 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 119 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 271 days monitored. Median AQI: 51 (Moderate).
Insights: Bibb County, Georgia. EPA monitors recorded a median Air Quality Index of 51 across 271 measured days in 2025, earning a Moderate classification and a Poor health grade. Of those days, 134 (49%) fell in the Good band (AQI 0–50), 136 (50%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 64, while the worst single-day peak hit 119 (USG). Residents averaged about 14.8 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (232 days), Ozone (39 days). Across the 2020–2025 trend window, good days shifted by -128 and the median AQI moved +9 points, placing the multi-year trajectory at worsening. The worst single reading over the 2020–2025 window was AQI 119, usg but never Unhealthy. Nearby counties show comparable readings: Charlton (79.0% good, AQI 24); 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
49.5%
134 of 271 monitored days
-25.5pp vs 75% target
Max AQI Recorded
119
USG
Health Grade
Poor
90th-pct AQI 64
Bibb County, Good days share 49.5%
National avg
Share of monitored days at AQI 0-50 (Good band).
Bibb 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 271 monitored days across EPA AQI categories.
Good
134
49%
Moderate
136
50%
USG
1
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 Bibb County.
- PM2.5 · 232 days · 85.6%
- Ozone · 39 days · 14.4%
Health Impact Assessment
Poor
Bibb County's air quality is rated Poor based on 49.5% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 49.5% of monitored days in 2025, with a median AQI of 51. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 232 of 271 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Bibb County. Best year: 2020 (262 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 262 | 104 | 0 | 0 | 42 | 97 |
| 2021 | 198 | 165 | 2 | 0 | 48 | 131 |
| 2022 | 216 | 149 | 0 | 0 | 46 | 91 |
| 2023 | 136 | 211 | 3 | 1 | 53 | 157 |
| 2024 | 179 | 185 | 2 | 0 | 51 | 123 |
| 2025 | 134 | 136 | 1 | 0 | 51 | 119 |
How does Bibb County compare?
How Bibb County compares
Good-day share worse than US avg
Bibb County 49.5%
Charlton County, Georgia 79.0%
US average 76.5%
Median AQI worse than US avg
Bibb County 51
Charlton County, Georgia 24
US average 38
Unhealthy days / yr about average
Bibb County 0
Charlton 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 Bibb County.
Arapahoe County, Colorado
AQI 51 · 47.3% good
East Baton Rouge County, Louisiana
AQI 51 · 49.3% good
Eddy County, New Mexico
AQI 51 · 46.9% good
Hillsborough County, Florida
AQI 51 · 49.3% good
Jefferson County, Colorado
AQI 51 · 46.5% good
Mecklenburg County, North Carolina
AQI 51 · 49.2% good
What Bibb 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 51 means for exposure. Health guidance
- See how Bibb County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Bibb County with its Georgia neighbours before drawing a conclusion about the region. All of Georgia
Based on 271 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 Bibb County, Georgia? ▼
Bibb County has a median Air Quality Index (AQI) of 51, rated "Moderate." 49.5% of monitored days (134 out of 271) had good air quality in 2025.
What is the main pollutant in Bibb County? ▼
The primary pollutant in Bibb County is Fine Particles (PM2.5), which was the main AQI driver on 232 days (86% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Bibb County have? ▼
In 2025, Bibb County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 119.
Is the air quality in Bibb County getting better or worse? ▼
Air quality in Bibb County is worsening based on 5-year trends (2020-2025). Best year: 2020 with 262 good days. Worst year: 2025 with 134 good days.
What does AQI 51 mean for health? ▼
Bibb County's median AQI of 51 falls in the "Moderate" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Bibb County compare to other counties in Georgia? ▼
Bibb County has 49.5% good air days. Nearby counties in Georgia: Charlton (79.0% 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 Bibb County? ▼
The 90th percentile AQI for Bibb County is 64, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 119 (USG).
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.