EnviroNearby

Flagler County, Florida air quality history

Daily Air Quality Index summaries from EPA monitors in Flagler, Florida, 2011–2025.

98%
Good days in 2025
34
Median daily AQI, 2025
0
Days above 100 in 2025
364
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Flagler, Florida on 364 days. 357 of those days (98%) were in the Good range, and the median daily AQI was 34. That median is lower than the typical monitored county in Florida (median 41 across 38 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 364 days. Across the years with fuller monitoring, the share of Good days rose: an average of 94% in 2011–2013 versus 98% 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%2011: Good 121 of 128 days2011: Moderate 7 of 128 days20112012: Good 329 of 356 days2012: Moderate 25 of 356 days2012: Unhealthy for Sensitive Groups 2 of 356 days2013: Good 347 of 365 days2013: Moderate 18 of 365 days20132014: Good 335 of 360 days2014: Moderate 25 of 360 days2015: Good 360 of 365 days2015: Moderate 5 of 365 days20152016: Good 346 of 362 days2016: Moderate 16 of 362 days2017: Good 345 of 359 days2017: Moderate 14 of 359 days20172018: Good 330 of 345 days2018: Moderate 15 of 345 days2019: Good 265 of 270 days2019: Moderate 5 of 270 days20192020: Good 363 of 366 days2020: Moderate 3 of 366 days2021: Good 344 of 353 days2021: Moderate 9 of 353 days20212022: Good 352 of 361 days2022: Moderate 9 of 361 days2023: Good 354 of 364 days2023: Moderate 10 of 364 days20232024: Good 344 of 354 days2024: Moderate 10 of 354 days2025: Good 357 of 364 days2025: Moderate 7 of 364 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 year0501002011: 90th percentile AQI 452012: 90th percentile AQI 472013: 90th percentile AQI 472014: 90th percentile AQI 472015: 90th percentile AQI 442016: 90th percentile AQI 462017: 90th percentile AQI 452018: 90th percentile AQI 472019: 90th percentile AQI 452020: 90th percentile AQI 432021: 90th percentile AQI 442022: 90th percentile AQI 442023: 90th percentile AQI 462024: 90th percentile AQI 452025: 90th percentile AQI 452011: Median AQI 362012: Median AQI 352013: Median AQI 332014: Median AQI 352015: Median AQI 332016: Median AQI 352017: Median AQI 332018: Median AQI 322019: Median AQI 342020: Median AQI 312021: Median AQI 332022: Median AQI 342023: Median AQI 352024: Median AQI 352025: Median AQI 3420112013201520172019202120232025
  • 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
Ozone364100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536435770000344577Ozone
2024354344100000354571Ozone
2023364354100000354671Ozone
2022361352900003444100Ozone
202135334490000334467Ozone
202036636330000314364Ozone
201927026550000344574Ozone
2018345330150000324777Ozone
2017359345140000334593Ozone
2016362346160000354674Ozone
201536536050000334474Ozone
2014360335250000354790Ozone
2013365347180000334790Ozone
20123563292520003547112Ozone
201112812170000364587Ozone

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 Florida with a similar median AQI in 2025

All monitored counties in Florida

Source: U.S. EPA AirData, “Annual AQI by County” files for 2011–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem