Median AQI
46
Good
Georgia · County air quality · 2025
Walker County, Georgia
Median AQI 46 (Good). 55.1% of monitored days rated Good, direct from EPA Air Quality System stations.
- 46
- Median AQI
- 55.1%
- Good-air days
- 2
- Unhealthy days
- 10%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Walker County's air is good on balance, among the more polluted 10% of US counties, a median AQI of 46 with 55.1% of 243 monitored days in the Good band, driven mainly by PM2.5.
- 46
- median AQI · Good
- 55.1%
- days rated Good
- PM2.5
- main pollutant
- 10%
- cleaner than US counties
2 days reached Unhealthy or worse; the worst single reading hit AQI 181.
Data updated July 2026
- Good · 134 d · 55.1%
- Moderate · 106 d · 43.6%
- USG · 1 d · 0.4%
- Unhealthy · 2 d · 0.8%
How did Walker County's air break down in 2025?
Across 243 monitored days, 134 fell in the Good band (AQI 0–50) and 2 reached Unhealthy or worse. The worst single day peaked at AQI 181 (Unhealthy).
EPA AQS →Air quality data from EPA Air Quality System (2025). 243 days monitored. Median AQI: 46 (Good).
Insights: Walker County, Georgia. EPA monitors recorded a median Air Quality Index of 46 across 243 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 134 (55%) fell in the Good band (AQI 0–50), 106 (44%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 65, while the worst single-day peak hit 181 (Unhealthy). Residents averaged about 16.5 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (243 days). Across the 2020–2025 trend window, good days shifted by +16 and the median AQI moved +5 points, placing the multi-year trajectory at worsening. Residents and visitors experienced 2 unhealthy-or-worse days combined, periods when the EPA recommends sensitive groups limit prolonged outdoor exertion. Nearby counties show comparable readings: Bibb (49.5% good, AQI 51); 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).
Air Quality Summary
Good Days
55.1%
134 of 243 monitored days
-19.9pp vs 75% target
Max AQI Recorded
181
Unhealthy
Health Grade
Moderate
90th-pct AQI 65
Walker County, Good days share 55.1%
National avg
Share of monitored days at AQI 0-50 (Good band).
Walker County, Unhealthy-or-worse share 0.8%
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 243 monitored days across EPA AQI categories.
Good
134
55%
Moderate
106
44%
USG
1
0%
Unhealthy
2
1%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Walker County.
- PM2.5 · 243 days · 100.0%
Health Impact Assessment
Moderate
Walker County's air quality is rated Moderate based on 55.1% good air days. There were 2 unhealthy days in 2025 when outdoor activity should be limited.
Air quality is acceptable most days, but 1 days reached "Unhealthy for Sensitive Groups" (AQI 101-150) and peak AQI reached 181. Sensitive groups should monitor real-time conditions at AirNow.gov.
The dominant pollutant is PM2.5, driving AQI on 243 of 243 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Walker County. Best year: 2024 (165 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 118 | 59 | 0 | 0 | 41 | 86 |
| 2021 | 93 | 139 | 1 | 0 | 53 | 110 |
| 2022 | 136 | 216 | 0 | 0 | 53 | 89 |
| 2023 | 129 | 229 | 4 | 0 | 53 | 145 |
| 2024 | 165 | 198 | 0 | 0 | 52 | 98 |
| 2025 | 134 | 106 | 1 | 2 | 46 | 181 |
How does Walker County compare?
How Walker County compares
Good-day share worse than US avg
Walker County 55.1%
Bibb County, Georgia 49.5%
US average 76.5%
Median AQI worse than US avg
Walker County 46
Bibb County, Georgia 51
US average 38
Unhealthy days / yr worse than US avg
Walker County 2
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 Walker County.
Bay County, Florida
AQI 46 · 60.6% good
Blount County, Tennessee
AQI 46 · 69.6% good
Cache County, Utah
AQI 46 · 61.2% good
Chesterfield County, South Carolina
AQI 46 · 61.2% good
Clark County, Indiana
AQI 46 · 59.7% good
Clark County, Ohio
AQI 46 · 59.4% good
What Walker County's air means for you
On most days the air here is fine, but PM2.5 drives 2 unhealthy-or-worse days a year that sensitive groups should plan around.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 46 means for exposure. Health guidance
- See how Walker County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Walker County with its Georgia neighbours before drawing a conclusion about the region. All of Georgia
Based on 243 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 Walker County, Georgia? ▼
Walker County has a median Air Quality Index (AQI) of 46, rated "Good." 55.1% of monitored days (134 out of 243) had good air quality in 2025.
What is the main pollutant in Walker County? ▼
The primary pollutant in Walker County is Fine Particles (PM2.5), which was the main AQI driver on 243 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Walker County have? ▼
In 2025, Walker County recorded 2 unhealthy air days (2 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 181.
Is the air quality in Walker County getting better or worse? ▼
Air quality in Walker County is worsening based on 5-year trends (2020-2025). Best year: 2024 with 165 good days. Worst year: 2021 with 93 good days.
What does AQI 46 mean for health? ▼
Walker County's median AQI of 46 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 Walker County compare to other counties in Georgia? ▼
Walker County has 55.1% good air days. Nearby counties in Georgia: Bibb (49.5% good), Charlton (79.0% good), Chatham (66.7% good), Clarke (66.7% good), Clayton (53.1% good), Cobb (92.5% good).
What is the 90th percentile AQI in Walker County? ▼
The 90th percentile AQI for Walker County is 65, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 181 (Unhealthy).
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.