EnviroNearby

Coweta County, Georgia air quality history

Daily Air Quality Index summaries from EPA monitors in Coweta, Georgia, 1999–2017.

67%
Good days in 2017
43
Median daily AQI, 2017
0
Days above 100 in 2017
318
Days with an AQI in 2017 (of 365)

In 2017, EPA reported a daily Air Quality Index (AQI) for Coweta, Georgia on 318 days. 213 of those days (67%) were in the Good range, and the median daily AQI was 43. That median is about the same as the typical monitored county in Georgia (median 43 across 27 counties), and about the same as the typical monitored U.S. county (41). The main pollutant was fine particles (PM2.5) on 230 days. Across the years with fuller monitoring, the share of Good days rose: an average of 56% in 1999–2001 versus 66% in 2015–2017.

The most recent year with data for this county is 2017; EPA's files for 2018–2025 contain no row for it, which usually means its monitors stopped reporting.

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%1999: Good 74 of 167 days1999: Moderate 33 of 167 days1999: Unhealthy for Sensitive Groups 29 of 167 days1999: Unhealthy 25 of 167 days1999: Very Unhealthy 6 of 167 days19992000: Good 133 of 235 days2000: Moderate 57 of 235 days2000: Unhealthy for Sensitive Groups 35 of 235 days2000: Unhealthy 9 of 235 days2000: Very Unhealthy 1 of 235 days2001: Good 166 of 245 days2001: Moderate 60 of 245 days2001: Unhealthy for Sensitive Groups 16 of 245 days2001: Unhealthy 3 of 245 days20012002: Good 165 of 245 days2002: Moderate 54 of 245 days2002: Unhealthy for Sensitive Groups 17 of 245 days2002: Unhealthy 8 of 245 days2002: Very Unhealthy 1 of 245 days2003: Good 168 of 287 days2003: Moderate 109 of 287 days2003: Unhealthy for Sensitive Groups 10 of 287 days20032004: Good 113 of 344 days2004: Moderate 216 of 344 days2004: Unhealthy for Sensitive Groups 13 of 344 days2004: Unhealthy 2 of 344 days2005: Good 107 of 338 days2005: Moderate 203 of 338 days2005: Unhealthy for Sensitive Groups 27 of 338 days2005: Unhealthy 1 of 338 days20052006: Good 92 of 360 days2006: Moderate 246 of 360 days2006: Unhealthy for Sensitive Groups 18 of 360 days2006: Unhealthy 4 of 360 days2007: Good 116 of 364 days2007: Moderate 220 of 364 days2007: Unhealthy for Sensitive Groups 19 of 364 days2007: Unhealthy 8 of 364 days2007: Very Unhealthy 1 of 364 days20072008: Good 135 of 363 days2008: Moderate 217 of 363 days2008: Unhealthy for Sensitive Groups 10 of 363 days2008: Unhealthy 1 of 363 days2009: Good 174 of 359 days2009: Moderate 182 of 359 days2009: Unhealthy for Sensitive Groups 3 of 359 days20092010: Good 156 of 365 days2010: Moderate 209 of 365 days2011: Good 184 of 365 days2011: Moderate 174 of 365 days2011: Unhealthy for Sensitive Groups 7 of 365 days20112012: Good 193 of 364 days2012: Moderate 170 of 364 days2012: Unhealthy for Sensitive Groups 1 of 364 days2013: Good 243 of 365 days2013: Moderate 122 of 365 days20132014: Good 213 of 357 days2014: Moderate 141 of 357 days2014: Unhealthy for Sensitive Groups 3 of 357 days2015: Good 241 of 365 days2015: Moderate 122 of 365 days2015: Unhealthy for Sensitive Groups 2 of 365 days20152016: Good 242 of 366 days2016: Moderate 123 of 366 days2016: Unhealthy 1 of 366 days2017: Good 213 of 318 days2017: Moderate 105 of 318 days2017
  • 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 year0501001502001999: 90th percentile AQI 1722000: 90th percentile AQI 1222001: 90th percentile AQI 932002: 90th percentile AQI 1052003: 90th percentile AQI 812004: 90th percentile AQI 842005: 90th percentile AQI 932006: 90th percentile AQI 902007: 90th percentile AQI 962008: 90th percentile AQI 772009: 90th percentile AQI 672010: 90th percentile AQI 722011: 90th percentile AQI 732012: 90th percentile AQI 622013: 90th percentile AQI 602014: 90th percentile AQI 622015: 90th percentile AQI 592016: 90th percentile AQI 612017: 90th percentile AQI 591999: Median AQI 612000: Median AQI 472001: Median AQI 432002: Median AQI 402003: Median AQI 462004: Median AQI 572005: Median AQI 582006: Median AQI 602007: Median AQI 602008: Median AQI 552009: Median AQI 512010: Median AQI 532011: Median AQI 502012: Median AQI 482013: Median AQI 432014: Median AQI 452015: Median AQI 422016: Median AQI 432017: Median AQI 431999200120032005200720092011201320152017
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2017

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
Fine particles (PM2.5)23072%
Ozone8828%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20173182131050000435974PM2.5
201636624212301004361154PM2.5
201536524112220004259108PM2.5
201435721314130004562108PM2.5
20133652431220000436074PM2.5
201236419317010004862112PM2.5
201136518417470005073115PM2.5
201036515620900005372100PM2.5
200935917418230005167102PM2.5
2008363135217101005577164PM2.5
2007364116220198106096201PM2.5
200636092246184006090156PM2.5
2005338107203271005893163PM2.5
2004344113216132005784182PM2.5
2003287168109100004681147Ozone
2002245165541781040105201Ozone
200124516660163004393190Ozone
2000235133573591047122208Ozone
1999167743329256061172215Ozone

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.

All monitored counties in Georgia

Source: U.S. EPA AirData, “Annual AQI by County” files for 1999–2017 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem