EnviroNearby

Glynn County, Georgia air quality history

Daily Air Quality Index summaries from EPA monitors in Glynn, Georgia, 1995–2025.

74%
Good days in 2025
41
Median daily AQI, 2025
0
Days above 100 in 2025
343
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Glynn, Georgia on 343 days. 255 of those days (74%) were in the Good range, and the median daily AQI was 41. That median is lower than the typical monitored county in Georgia (median 46 across 25 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 227 days. Across the years with fuller monitoring, the share of Good days fell: an average of 83% in 1995–1997 versus 73% in 2023–2025.

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%1995: Good 131 of 145 days1995: Moderate 12 of 145 days1995: Unhealthy for Sensitive Groups 2 of 145 days19951996: Good 199 of 241 days1996: Moderate 37 of 241 days1996: Unhealthy for Sensitive Groups 5 of 241 days1997: Good 175 of 231 days1997: Moderate 48 of 231 days1997: Unhealthy for Sensitive Groups 8 of 231 days1998: Good 158 of 210 days1998: Moderate 40 of 210 days1998: Unhealthy for Sensitive Groups 10 of 210 days1998: Unhealthy 2 of 210 days1999: Good 148 of 252 days1999: Moderate 87 of 252 days1999: Unhealthy for Sensitive Groups 17 of 252 days2000: Good 151 of 282 days2000: Moderate 125 of 282 days2000: Unhealthy for Sensitive Groups 6 of 282 days20002001: Good 181 of 275 days2001: Moderate 89 of 275 days2001: Unhealthy for Sensitive Groups 4 of 275 days2001: Unhealthy 1 of 275 days2002: Good 193 of 285 days2002: Moderate 86 of 285 days2002: Unhealthy for Sensitive Groups 6 of 285 days2003: Good 190 of 275 days2003: Moderate 83 of 275 days2003: Unhealthy for Sensitive Groups 2 of 275 days2004: Good 195 of 282 days2004: Moderate 82 of 282 days2004: Unhealthy for Sensitive Groups 5 of 282 days2005: Good 175 of 281 days2005: Moderate 105 of 281 days2005: Unhealthy for Sensitive Groups 1 of 281 days20052006: Good 182 of 282 days2006: Moderate 99 of 282 days2006: Unhealthy for Sensitive Groups 1 of 282 days2007: Good 195 of 279 days2007: Moderate 82 of 279 days2007: Unhealthy for Sensitive Groups 2 of 279 days2008: Good 202 of 273 days2008: Moderate 69 of 273 days2008: Unhealthy for Sensitive Groups 2 of 273 days2009: Good 228 of 275 days2009: Moderate 45 of 275 days2009: Unhealthy for Sensitive Groups 2 of 275 days2010: Good 216 of 280 days2010: Moderate 64 of 280 days20102011: Good 205 of 266 days2011: Moderate 60 of 266 days2011: Unhealthy for Sensitive Groups 1 of 266 days2012: Good 238 of 264 days2012: Moderate 26 of 264 days2013: Good 257 of 312 days2013: Moderate 55 of 312 days2014: Good 212 of 332 days2014: Moderate 120 of 332 days2015: Good 276 of 354 days2015: Moderate 78 of 354 days20152016: Good 255 of 343 days2016: Moderate 86 of 343 days2016: Unhealthy for Sensitive Groups 2 of 343 days2017: Good 241 of 276 days2017: Moderate 35 of 276 days2018: Good 247 of 272 days2018: Moderate 25 of 272 days2019: Good 235 of 279 days2019: Moderate 44 of 279 days2020: Good 256 of 285 days2020: Moderate 29 of 285 days20202021: Good 267 of 322 days2021: Moderate 55 of 322 days2022: Good 221 of 356 days2022: Moderate 134 of 356 days2022: Unhealthy for Sensitive Groups 1 of 356 days2023: Good 243 of 363 days2023: Moderate 120 of 363 days2024: Good 286 of 366 days2024: Moderate 80 of 366 days2025: Good 255 of 343 days2025: Moderate 88 of 343 days2025
  • 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 year0501001995: 90th percentile AQI 501996: 90th percentile AQI 611997: 90th percentile AQI 741998: 90th percentile AQI 841999: 90th percentile AQI 922000: 90th percentile AQI 842001: 90th percentile AQI 742002: 90th percentile AQI 712003: 90th percentile AQI 692004: 90th percentile AQI 682005: 90th percentile AQI 662006: 90th percentile AQI 662007: 90th percentile AQI 612008: 90th percentile AQI 592009: 90th percentile AQI 562010: 90th percentile AQI 612011: 90th percentile AQI 612012: 90th percentile AQI 502013: 90th percentile AQI 562014: 90th percentile AQI 592015: 90th percentile AQI 542016: 90th percentile AQI 552017: 90th percentile AQI 522018: 90th percentile AQI 492019: 90th percentile AQI 542020: 90th percentile AQI 512021: 90th percentile AQI 542022: 90th percentile AQI 622023: 90th percentile AQI 612024: 90th percentile AQI 562025: 90th percentile AQI 571995: Median AQI 331996: Median AQI 401997: Median AQI 391998: Median AQI 401999: Median AQI 442000: Median AQI 492001: Median AQI 442002: Median AQI 432003: Median AQI 422004: Median AQI 432005: Median AQI 442006: Median AQI 452007: Median AQI 412008: Median AQI 412009: Median AQI 382010: Median AQI 422011: Median AQI 412012: Median AQI 362013: Median AQI 382014: Median AQI 442015: Median AQI 382016: Median AQI 412017: Median AQI 372018: Median AQI 352019: Median AQI 372020: Median AQI 332021: Median AQI 382022: Median AQI 452023: Median AQI 432024: Median AQI 392025: Median AQI 411995200020052010201520202025
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2025

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)22766%
Ozone11634%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025343255880000415794PM2.5
2024366286800000395684PM2.5
20233632431200000436190PM2.5
202235622113410004562106PM2.5
2021322267550000385480Ozone
2020285256290000335197Ozone
2019279235440000375480Ozone
2018272247250000354974Ozone
2017276241350000375277Ozone
20163432558620004155129PM2.5
2015354276780000385467PM2.5
20143322121200000445989PM2.5
2013312257550000385680Ozone
2012264238260000365089Ozone
20112662056010004161108Ozone
2010280216640000426193Ozone
20092752284520003856144Ozone
20082732026920004159101Ozone
20072791958220004161149Ozone
20062821829910004566122Ozone
200528117510510004466127Ozone
20042821958250004368129Ozone
20032751908320004269112Ozone
20022851938660004371143Ozone
20012751818941004474164Ozone
200028215112560004984147Ozone
199925214887170004492150Ozone
199821015840102004084190Ozone
19972311754880003974150Ozone
19962411993750004061119Ozone
19951451311220003350129Ozone

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 2025

All monitored counties in Georgia

Source: U.S. EPA AirData, “Annual AQI by County” files for 1995–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem