Georgia · County air quality · 2024
Chattooga County, Georgia
Median AQI 39 (Good). 96.3% of monitored days rated Good, direct from EPA Air Quality System stations.
- 39
- Median AQI
- 96.3%
- Good-air days
- 0
- Unhealthy days
- 93%
- Cleaner than US counties
Chattooga County's 2024 annual median AQI is 39 (Good), with 96.3% Good days
According to the U.S. EPA Air Quality System, Chattooga County, Georgia posted a 2024 median AQI of 39 (Good) across 240 monitored days, with 96.3% rated Good and 0 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Chattooga County's 96.3% Good-day share places it cleaner than 93% of US counties in 2024.
- Closest median-AQI peer
- Big Horn County (89.2% Good, median AQI 39) is the closest nationwide median-AQI peer to Chattooga County.
- 2020–2024 trend
- Chattooga County's floor-qualifying Good-day share is worsening from 2020 to 2024 (99.6% → 96.3%).
- Median AQI
- Median AQI: 39
According to the 2024 EPA AQS county release on PlainAirData, Chattooga County, Georgia is #1 of 15 by lowest good-day share (96.3%, median AQI 39) at median-AQI #5 ≠ San Mateo County, California #1 highest median AQI (27, 88.1% Good days).
Annual release change
What changed in the 2024 EPA annual release
- Chattooga County's Good-day share rose from 92.2% to 96.3% between the 2023 and 2024 EPA annual releases, a change of +4.0 percentage points.
- Chattooga County's peak single-day AQI fell from 100 to 77 between the 2023 and 2024 EPA annual releases, a change of -23 points.
Data updated August 2026
- Good · 231 d · 96.3%
- Moderate · 9 d · 3.8%
How did Chattooga County's air break down in 2024?
Across 240 monitored days, 231 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 77 (Moderate).
EPA AQS →Share of monitored days at AQI 0-50 (Good band).
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
Where Chattooga County sits nationally
COUNT-derived placement among 951 US counties with at least 100 monitored days in 2024. Chattooga County's Good-day share is 96.3% - cleaner than 93% of that comparison set.
Chattooga County Good-day share vs. every US county
Share of monitored days in the Good band (AQI 0–50) - EPA AQS annual release
96.3% Cleaner than 93% higher than 93% of 951 US counties
Each bar is a band; taller bars hold more US counties. 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) · 2024
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Chattooga County.
- Ozone · 240 days · 100.0%
2024 daily-monitor rhythm in Chattooga County
Month-by-month median AQI from EPA day-level county monitors (240 reported days in 2024). Apr posted the highest typical readings (median AQI 44, peak 50); Jul was cleanest at median 30.
Five-year seasonal record
EPA day-level county files · 2020–20241,219 daily readings show a recurring local pattern: Apr has the highest matched-month median AQI (42), while Jul is lowest (30). Each cell is that month’s median daily AQI, not a current-air forecast.
Lower AQI is better. The colors summarize EPA AQI bands; gaps mean the county had no day-level record for that month.
Health Impact Assessment
Chattooga County's air quality is rated Excellent based on 96.3% good air days. No unhealthy air days were recorded in 2024.
Air quality was acceptable on 96.3% of monitored days in 2024, with a median AQI of 39. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 240 of 240 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Chattooga County. Highest Good-day share: 2020 (99.6%, 244 of 245 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 244 | 1 | 0 | 0 | 32 | 58 |
| 2021 | 238 | 7 | 0 | 0 | 33 | 80 |
| 2022 | 236 | 9 | 0 | 0 | 35 | 77 |
| 2023 | 225 | 19 | 0 | 0 | 38 | 100 |
| 2024 | 231 | 9 | 0 | 0 | 39 | 77 |
How does Chattooga County compare?
How Chattooga County compares
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. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Chattooga County, Georgia · 2020–2025
Download this county's annual AQI row as CSV , with the same EPA fields and denominator shown on this page.
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.