EnviroNearby

Chattooga County, Georgia air quality history

Daily Air Quality Index summaries from EPA monitors in Chattooga, Georgia, 1990–2024.

96%
Good days in 2024
39
Median daily AQI, 2024
0
Days above 100 in 2024
240
Days with an AQI in 2024 (of 366)

In 2024, EPA reported a daily Air Quality Index (AQI) for Chattooga, Georgia on 240 days. 231 of those days (96%) were in the Good range, and the median daily AQI was 39. That median is lower than the typical monitored county in Georgia (median 44 across 28 counties), and about the same as the typical monitored U.S. county (41). The main pollutant was ozone on 240 days. Across the years with fuller monitoring, the share of Good days rose: an average of 73% in 2004–2006 versus 95% in 2022–2024.

EPA did not report an AQI for every day of 2024 here (240 of 366 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

The most recent year with data for this county is 2024; EPA's files for 2025–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (1998, 1999, 2000, 2001, 2002, 2003…) are shown in the table but left out of comparisons and trend statements.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Share of monitored days in each AQI category, by year0%25%50%75%100%1990: Good 20 of 20 days19901991: Good 37 of 38 days1991: Moderate 1 of 38 days1992: Good 22 of 22 days1993: Good 29 of 29 days1994: Good 48 of 49 days1994: Moderate 1 of 49 days1995: Good 56 of 58 days1995: Moderate 2 of 58 days19951996: Good 53 of 54 days1996: Moderate 1 of 54 days1997: Good 55 of 56 days1997: Moderate 1 of 56 days1998: Good 53 of 55 days1998: Moderate 2 of 55 days1999: Good 52 of 54 days1999: Moderate 2 of 54 days2000: Good 39 of 40 days2000: Moderate 1 of 40 days20002001: Good 56 of 56 days2002: Good 51 of 51 days2003: Good 52 of 52 days2004: Good 184 of 253 days2004: Moderate 64 of 253 days2004: Unhealthy for Sensitive Groups 5 of 253 days2005: Good 190 of 261 days2005: Moderate 57 of 261 days2005: Unhealthy for Sensitive Groups 14 of 261 days20052006: Good 194 of 263 days2006: Moderate 60 of 263 days2006: Unhealthy for Sensitive Groups 9 of 263 days2007: Good 141 of 262 days2007: Moderate 97 of 262 days2007: Unhealthy for Sensitive Groups 23 of 262 days2007: Unhealthy 1 of 262 days2008: Good 201 of 260 days2008: Moderate 58 of 260 days2008: Unhealthy for Sensitive Groups 1 of 260 days2009: Good 233 of 262 days2009: Moderate 29 of 262 days2010: Good 203 of 264 days2010: Moderate 61 of 264 days20102011: Good 202 of 256 days2011: Moderate 51 of 256 days2011: Unhealthy for Sensitive Groups 3 of 256 days2012: Good 217 of 265 days2012: Moderate 46 of 265 days2012: Unhealthy for Sensitive Groups 2 of 265 days2013: Good 233 of 244 days2013: Moderate 11 of 244 days2014: Good 227 of 245 days2014: Moderate 18 of 245 days2015: Good 173 of 191 days2015: Moderate 18 of 191 days20152016: Good 217 of 242 days2016: Moderate 25 of 242 days2017: Good 232 of 240 days2017: Moderate 8 of 240 days2018: Good 224 of 245 days2018: Moderate 21 of 245 days2019: Good 231 of 244 days2019: Moderate 13 of 244 days2020: Good 244 of 245 days2020: Moderate 1 of 245 days20202021: Good 238 of 245 days2021: Moderate 7 of 245 days2022: Good 236 of 245 days2022: Moderate 9 of 245 days2023: Good 225 of 244 days2023: Moderate 19 of 244 days2024: Good 231 of 240 days2024: Moderate 9 of 240 days2024
  • Good
  • Moderate
  • Unhealthy for Sensitive Groups
  • Unhealthy
  • Very Unhealthy
  • Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median and 90th-percentile daily AQI, by year0501001990: 90th percentile AQI 431991: 90th percentile AQI 391992: 90th percentile AQI 301993: 90th percentile AQI 301994: 90th percentile AQI 331995: 90th percentile AQI 421996: 90th percentile AQI 241997: 90th percentile AQI 311998: 90th percentile AQI 361999: 90th percentile AQI 342000: 90th percentile AQI 372001: 90th percentile AQI 302002: 90th percentile AQI 272003: 90th percentile AQI 292004: 90th percentile AQI 802005: 90th percentile AQI 802006: 90th percentile AQI 742007: 90th percentile AQI 1002008: 90th percentile AQI 712009: 90th percentile AQI 512010: 90th percentile AQI 712011: 90th percentile AQI 612012: 90th percentile AQI 612013: 90th percentile AQI 462014: 90th percentile AQI 492015: 90th percentile AQI 492016: 90th percentile AQI 512017: 90th percentile AQI 452018: 90th percentile AQI 502019: 90th percentile AQI 482020: 90th percentile AQI 432021: 90th percentile AQI 452022: 90th percentile AQI 472023: 90th percentile AQI 492024: 90th percentile AQI 481990: Median AQI 221991: Median AQI 171992: Median AQI 211993: Median AQI 171994: Median AQI 161995: Median AQI 191996: Median AQI 171997: Median AQI 171998: Median AQI 181999: Median AQI 192000: Median AQI 192001: Median AQI 122002: Median AQI 152003: Median AQI 192004: Median AQI 432005: Median AQI 432006: Median AQI 442007: Median AQI 492008: Median AQI 422009: Median AQI 352010: Median AQI 412011: Median AQI 392012: Median AQI 392013: Median AQI 372014: Median AQI 362015: Median AQI 362016: Median AQI 422017: Median AQI 362018: Median AQI 352019: Median AQI 402020: Median AQI 322021: Median AQI 332022: Median AQI 352023: Median AQI 382024: Median AQI 3919901995200020052010201520202024
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2024

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

PollutantDays as main pollutantShare of monitored days
Ozone240100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202424023190000394877Ozone
20232442251900003849100Ozone
202224523690000354777Ozone
202124523870000334580Ozone
202024524410000324358Ozone
2019244231130000404871Ozone
2018245224210000355087Ozone
201724023280000364564Ozone
2016242217250000425193Ozone
2015191173180000364997Ozone
2014245227180000364977Ozone
2013244233110000374677Ozone
20122652174620003961108Ozone
20112562025130003961115Ozone
2010264203610000417197Ozone
20092622332900003551100Ozone
20082602015810004271101Ozone
2007262141972310049100182Ozone
20062631946090004474143Ozone
200526119057140004380150Ozone
20042531846450004380122Ozone
2003525200000192949PM10
2002515100000152738PM10
2001565600000123049PM10
2000403910000193769PM10
1999545220000193464PM10
1998555320000183681PM10
1997565510000173159PM10
1996545310000172473PM10
1995585620000194267PM10
1994494810000163351PM10
1993292900000173043PM10
1992222200000213041PM10
1991383710000173958PM10
1990202000000224344PM10

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in Georgia with a similar median AQI in 2024

All monitored counties in Georgia

Source: U.S. EPA AirData, “Annual AQI by County” files for 1990–2024 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem