Bad Air Days in Adair County, Oklahoma: 1 a Year

1 bad air day a year

Fewer bad air days than most monitored US counties. Ranked 602 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly particles: smoke and dust (86% particle days).

When the bad days come in Adair

Most bad days here fall in March and February and June. 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 11 bad days a year; in 2016 to 2025, 1. The air has improved. The worst recent year was 2022, with 4 bad days on 361 monitored days.

Date	AQI	Main pollutant
2025-03-14	184	PM10
2025-03-15	167	PM10
2020-06-27	152	PM2.5
2018-03-21	145	PM2.5
2024-03-24	138	PM2.5

Most days, not the worst ones

Across 3,640 monitored days from 2016 to 2025, the air in Adair County rated Good on 69% of them, close to the 72% typical of monitored counties, and Moderate on 31%. The median day sat at AQI 43; one day in ten went above 60.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)50%1,820 days
ozone49%1,789 days
coarse dust (PM10)1%28 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	362	202	158	2	2	48	184
2024	366	209	153	4	0	47	138
2023	365	172	193	0	0	51	100
2022	361	274	83	4	0	43	122
2021	365	291	73	1	0	40	117
2020	363	297	65	1	1	36	152
2019	365	295	70	0	0	40	88
2018	365	263	100	2	0	42	145
2017	362	238	124	0	0	44	97
2016	366	271	95	0	0	43	91
2015	365	240	125	0	0	44	93
2014	365	206	157	2	1	46	198
2013	365	131	231	3	0	55	105
2012	366	156	195	15	1	53	156
2011	365	135	216	14	0	56	136
2010	365	90	273	2	0	60	105

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

Oklahoma compared

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.