Metro area air quality · 2024

Summerville, GA

Median AQI 39 (Good). 96.3% of monitored days rated Good across this metro's EPA monitoring network.

39
Median AQI
96.3%
Good-air days
0
Unhealthy days
95%
Cleaner than US metros

Aggregated from EPA Air Quality System (2024), 240 monitored days. EPA AQS → · NOAA →

Insights: Summerville, GA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 39 over 240 measured days in 2024, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 231 Good days (96%), 9 Moderate (4%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 48 while the highest single-day reading hit 77 (Moderate). Metro residents averaged roughly 28.9 clean-air days per 30-day window across the reporting year.

Across the 2020–2024 trend window, good days shifted by -13 and the median AQI moved +7 points, which classifies the multi-year trajectory as worsening. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Alexandria, LA (70.3% good, AQI 39); Bend-Redmond, OR (70.5% good, AQI 39); Billings, MT (76.2% good, AQI 39).

Air Quality Summary

Median AQI

39

Good

Good Days

96.3%

231 of 240 days

Max AQI

77

Moderate

Health Grade

Excellent

90th pct: 48

AQI Day Breakdown (2024)

Distribution of 240 monitored days across EPA AQI categories.

Good

231

96%

Moderate

9

4%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Excellent

The Summerville, GA metro area's air quality is rated Excellent based on 96.3% good air days. No unhealthy air days were recorded in 2024.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Summerville, GA metro compare?

How Summerville, GA compares

Good-day share better than US avg
Summerville, GA 96.3%
Alexandria, LA 70.3%
US average 70.2%
Median AQI better than US avg
Summerville, GA 39
Alexandria, LA 39
US average 41
Unhealthy days / yr better than US avg
Summerville, GA 0
Alexandria, LA 0
US average 1

5-Year Air Quality Trend

Air quality is worsening in the Summerville, GA metro. Best year: 2020 (244 good days).

Year Good Moderate Unhealthy Median AQI
2020 244 1 0 32
2021 238 7 0 33
2022 236 9 0 35
2023 225 19 0 38
2024 231 9 0 39

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Summerville, GA.

Alexandria, LA

AQI 39 · 70.3% good

39

Bend-Redmond, OR

AQI 39 · 70.5% good

39

Billings, MT

AQI 39 · 76.2% good

39

Brunswick, GA

AQI 39 · 78.1% good

39

College Station-Bryan, TX

AQI 39 · 65.7% good

39

Columbia, MO

AQI 39 · 94.2% good

39

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Air Quality Guides

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Health Effects of Air Pollution

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Frequently Asked Questions

What is the air quality in the Summerville, GA metro area? ▼
The Summerville, GA metro area has a median Air Quality Index (AQI) of 39, rated "Good." 96.3% of monitored days (231 out of 240) had good air quality in 2024.
How many unhealthy air days does Summerville, GA have? ▼
In 2024, the Summerville, GA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 77.
Is air quality in Summerville, GA getting better or worse? ▼
Air quality in the Summerville, GA metro is worsening based on 5-year trends (2020-2024). Best year: 2020 with 244 good days. Worst year: 2023 with 225 good days.
What does AQI 39 mean for health? ▼
An AQI of 39 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
What is the 90th percentile AQI for Summerville, GA? ▼
The 90th percentile AQI for the Summerville, GA metro area is 48, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 77 (Moderate).
How does Summerville, GA compare to other metro areas? ▼
The Summerville, GA metro has 96.3% good air days. Similar metros: Alexandria, LA (70.3% good), Bend-Redmond, OR (70.5% good), Billings, MT (76.2% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2024. The AQS collects ambient air monitoring data from state, local, and tribal monitoring agencies across the United States.

Metrics: Air Quality Index (AQI) is calculated using EPA-standard breakpoints for six criteria pollutants: PM2.5, PM10, Ozone, NO2, CO, and SO2. Median AQI, max AQI, and 90th percentile AQI are computed from daily measurements. Good days percentage reflects days with AQI 0–50.

Coverage: 501 metro areas (Core Based Statistical Areas). Only metros with active monitoring stations are included. Unmonitored areas are not represented.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA, AirNow / AQS Air Quality Index readings and pollutant concentrations · 2025