Bad Air Days in Broward County, Florida: 1 a Year

1 bad air day a year

Fewer bad air days than most monitored US counties. Ranked 640 of 996 monitored counties, where 1 is worst.

What makes them bad: a mix of particles and ozone (58% particle days).

The bad-air season here

Most bad days here fall in May and January and July. Averaged over 2016 to 2025.

What actually helps 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 worst days on file

In 2000 to 2009 this county averaged 5 bad days a year; in 2016 to 2025, 1. The air has improved. The worst recent year was 2017, with 5 bad days on 357 monitored days.

Date	AQI	Main pollutant
2024-01-01	154	PM2.5
2017-05-11	143	Ozone
2020-07-05	142	PM2.5
2017-03-22	126	Ozone
2020-07-04	125	PM2.5

An ordinary day in Broward

Across 3,639 monitored days from 2016 to 2025, the air in Broward County rated Good on 55% of them, less often than the 72% typical of monitored counties, and Moderate on 45%. The median day sat at AQI 48; one day in ten went above 61.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)77%2,786 days
ozone22%799 days
nitrogen dioxide1%50 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	365	268	97	0	0	43	93
2024	366	213	152	1	1	47	154
2023	365	158	204	3	0	52	109
2022	365	197	168	0	0	49	100
2021	365	191	173	1	0	49	103
2020	366	192	172	2	0	49	142
2019	363	213	150	0	0	47	90
2018	365	191	174	0	0	49	100
2017	357	149	203	5	0	52	143
2016	362	213	149	0	0	47	93
2015	365	286	78	1	0	39	101
2014	365	249	114	2	0	43	115
2013	365	252	112	1	0	41	118
2012	366	237	128	1	0	44	147
2011	365	234	129	2	0	46	115
2010	365	194	170	1	0	49	105

*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.