Bad Air Days in Brevard County, Florida: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 922 of 996 monitored counties, where 1 is worst.

What makes them bad: a mix of particles and ozone (50% particle days).

When the bad days come in Brevard

Most bad days here fall in April and October. Averaged over 2016 to 2025.

What to buy, and what not to

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.

Better or worse than it was

In 2000 to 2009 this county averaged 6 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2018, with 1 bad day on 365 monitored days.

Date	AQI	Main pollutant
2023-10-03	130	PM2.5
2018-04-18	129	Ozone
2017-05-11	97	Ozone
2018-03-16	90	Ozone
2019-03-21	90	Ozone

The air on a normal day

Across 3,626 monitored days from 2016 to 2025, the air in Brevard County rated Good on 79% of them, more often than the 72% typical of monitored counties, and Moderate on 21%. The median day sat at AQI 42; one day in ten went above 55.

The pollutant setting the AQI on an ordinary day here:

ozone54%1,972 days
fine particles (PM2.5)46%1,654 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	365	333	32	0	38	80
2024	366	311	55	0	40	74
2023	365	279	85	1	43	130
2022	365	288	77	0	43	80
2021	365	255	110	0	45	84
2020	366	265	101	0	43	85
2019	351	308	43	0	39	90
2018	365	288	76	1	41	129
2017	352	254	98	0	43	97
2016	366	298	68	0	42	84
2015	365	309	56	0	39	90
2014	365	257	108	0	42	87
2013	365	285	80	0	40	93
2012	366	216	147	3	46	122
2011	365	215	148	2	47	105
2010	365	199	166	0	48	87

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

Nearby counties on file

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, and on why a purifier does not touch ozone in smoke vs ozone.