Bad Air Days in Baldwin County, Alabama: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 934 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly ozone: summer smog (0% particle days).

Which months to watch

Most bad days here fall in May. 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.

The worst days on file

In 2000 to 2009 this county averaged 21 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2017, with 1 bad day on 270 monitored days.

Date	AQI	Main pollutant
2017-05-08	108	Ozone
2017-05-09	100	Ozone
2018-05-09	97	Ozone
2022-06-13	97	PM2.5
2017-05-10	90	Ozone

Most days, not the worst ones

Across 2,977 monitored days from 2016 to 2025, the air in Baldwin County rated Good on 81% of them, more often than the 72% typical of monitored counties, and Moderate on 19%. The median day sat at AQI 40; one day in ten went above 55.

The pollutant setting the AQI on an ordinary day here:

ozone58%1,718 days
fine particles (PM2.5)42%1,259 days

Baldwin County by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	355	268	87	0	42	87
2024	355	278	77	0	40	90
2023	347	236	111	0	43	90
2022	281	237	44	0	39	97
2021	280	248	32	0	37	63
2020	269	223	46	0	38	74
2019	271	221	50	0	40	80
2018	270	232	38	0	37	97
2017	270	224	45	1	39	108
2016	279	233	46	0	40	87
2015	264	205	58	1	39	129
2014	280	209	69	2	40	112
2013	273	213	60	0	40	87
2012	284	202	80	2	41	112
2011	282	177	96	9	44	126
2010	274	161	107	6	47	150

*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.