Bad Air Days in Athens County, Ohio

Not enough data

EPA monitors in Athens County ran on too few days between 2016 and 2025 to give a fair yearly count (about 44% of days covered). Neighbouring counties below are a better guide.

What actually helps here

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

The worst days on file

The worst recent year was 2023, with 1 bad day on 244 monitored days.

Date	AQI	Main pollutant
2023-06-29	157	PM2.5
2023-07-17	99	PM2.5
2023-06-17	78	PM2.5
2021-07-21	77	PM2.5
2025-06-04	75	PM2.5

An ordinary day in Athens

Across 1,620 monitored days from 2016 to 2025, the air in Athens County rated Good on 85% of them, more often than the 72% typical of monitored counties, and Moderate on 15%. The median day sat at AQI 31; one day in ten went above 53.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%1,620 days

Athens County by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	361	301	60	0	0	31	75
2024	364	330	34	0	0	28	64
2023	244	208	35	1	1	31	157
2022	119	107	12	0	0	27	67
2021	113	91	22	0	0	27	77
2020	86	73	13	0	0	32	65
2019	120	99	21	0	0	33	61
2018	94	75	19	0	0	37	62
2017	59	46	13	0	0	34	61
2016	60	52	8	0	0	36	61
2015	57	36	21	0	0	38	71
2014	56	36	20	0	0	38	70
2013	57	37	20	0	0	44	69
2012	55	34	21	0	0	45	72
2011	347	278	65	4	0	31	115
2010	361	290	68	3	0	33	119

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

Ohio 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.