Bad Air Days in Flagler County, Florida: 0 a Year

0 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 956 of 996 monitored counties, where 1 is worst.

Is a purifier worth it here?

Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
On the odd bad day, check AirNow and keep windows shut.

The record for Flagler

Date	AQI	Main pollutant
2022-03-04	100	Ozone
2017-05-10	93	Ozone
2018-04-28	77	Ozone
2025-05-23	77	Ozone
2016-05-09	74	Ozone

Most days, not the worst ones

Across 3,498 monitored days from 2016 to 2025, the air in Flagler County rated Good on 97% of them, more often than the 72% typical of monitored counties, and Moderate on 3%. The median day sat at AQI 34; one day in ten went above 45.

The pollutant setting the AQI on an ordinary day here:

ozone100%3,498 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	364	357	7	0	34	77
2024	354	344	10	0	35	71
2023	364	354	10	0	35	71
2022	361	352	9	0	34	100
2021	353	344	9	0	33	67
2020	366	363	3	0	31	64
2019	270	265	5	0	34	74
2018	345	330	15	0	32	77
2017	359	345	14	0	33	93
2016	362	346	16	0	35	74
2015	365	360	5	0	33	74
2014	360	335	25	0	35	90
2013	365	347	18	0	33	90
2012	356	329	25	2	35	112
2011	128	121	7	0	36	87

*2025 may be a partial year in EPA's file.

Elsewhere in Florida

How this is counted

A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.