Bad Air Days in Sumter County, Alabama: 0 a Year

0 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 953 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 worst days on file

In 2000 to 2009 this county averaged 6 bad days a year; in 2016 to 2025, 0. The air has improved.

Date	AQI	Main pollutant
2025-04-10	90	Ozone
2017-11-28	85	PM2.5
2023-08-25	84	PM2.5
2023-03-09	82	PM2.5
2022-06-14	81	PM2.5

Most days, not the worst ones

Across 3,555 monitored days from 2016 to 2025, the air in Sumter County rated Good on 83% of them, more often than the 72% typical of monitored counties, and Moderate on 17%. The median day sat at AQI 36; one day in ten went above 53.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)66%2,332 days
ozone34%1,223 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	364	284	80	0	41	90
2024	366	309	57	0	36	73
2023	363	303	60	0	35	84
2022	355	266	89	0	38	81
2021	355	311	44	0	35	71
2020	355	314	41	0	33	74
2019	354	287	67	0	38	67
2018	357	327	30	0	31	77
2017	350	279	71	0	38	85
2016	336	282	54	0	37	74
2015	314	169	144	1	48	107
2014	241	232	9	0	34	74
2013	220	213	7	0	31	90
2011	198	174	24	0	38	93
2010	242	206	35	1	39	119

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

Elsewhere in Alabama

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.