Bad Air Days in Clay County, Alabama

Not enough data

EPA monitors in Clay County ran on too few days between 2016 and 2025 to give a fair yearly count (about 50% of days covered). Neighbouring counties below are a better guide.

Is a purifier worth it here?

EPA monitors here ran too few days to give a fair yearly count. Use AirNow for today's air.

Better or worse than it was

The worst recent year was 2025, with 1 bad day on 354 monitored days.

Date	AQI	Main pollutant
2025-01-26	133	PM2.5
2025-03-23	91	PM2.5
2020-06-26	88	PM2.5
2023-03-22	85	PM2.5
2025-02-20	78	PM2.5

The air on a normal day

Across 1,816 monitored days from 2016 to 2025, the air in Clay County rated Good on 77% of them, more often than the 72% typical of monitored counties, and Moderate on 23%. The median day sat at AQI 36; one day in ten went above 56.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%1,816 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	354	287	66	1	33	133
2024	354	307	47	0	29	75
2023	327	221	106	0	41	85
2022	115	91	24	0	34	68
2021	110	87	23	0	36	70
2020	105	83	22	0	34	88
2019	107	75	32	0	41	71
2018	110	86	24	0	36	68
2017	118	76	42	0	40	69
2016	116	83	33	0	41	61
2015	112	73	39	0	43	92
2014	114	64	50	0	48	73
2013	118	79	39	0	42	69
2012	121	71	50	0	46	75
2011	118	57	61	0	52	88
2010	113	46	67	0	53	87

*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.