Bad Air Days in Adams County, Ohio: 0 a Year

0 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 975 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

Date	AQI	Main pollutant
2017-07-21	87	PM2.5
2020-09-11	83	PM2.5
2016-11-08	73	PM2.5
2017-07-22	70	PM2.5
2018-08-26	70	PM2.5

An ordinary day in Adams

Across 1,678 monitored days from 2016 to 2020, the air in Adams County rated Good on 88% of them, more often than the 72% typical of monitored counties, and Moderate on 12%. The median day sat at AQI 32; one day in ten went above 51.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%1,678 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2020	287	215	72	0	39	83
2019	327	294	33	0	28	66
2018	333	288	45	0	31	70
2017	365	341	24	0	30	87
2016	366	339	27	0	31	73
2015	353	292	61	0	32	73
2014	359	278	81	0	36	71
2013	362	261	101	0	38	74
2012	366	241	125	0	42	76
2011	319	170	147	2	47	105
2010	178	38	140	0	57	98

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.