Bad Air Days in Columbiana County, Ohio

Not enough data

EPA monitors in Columbiana County ran on too few days between 2016 and 2025 to give a fair yearly count (about 16% of days covered). Neighbouring counties below are a better guide.

What to buy, and what not to

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

The worst days on file

Date	AQI	Main pollutant
2023-06-29	74	PM10
2023-07-17	44	PM10
2022-06-16	40	PM10
2016-01-07	36	PM10
2021-07-03	35	PM10

An ordinary day in Columbiana

Across 602 monitored days from 2016 to 2025, the air in Columbiana County rated Good on 100% of them, more often than the 72% typical of monitored counties, and Moderate on 0%. The median day sat at AQI 13; one day in ten went above 22.

The pollutant setting the AQI on an ordinary day here:

coarse dust (PM10)100%602 days

Every recent year on file

Year	Days monitored	Good	Moderate	Median AQI	Highest AQI
2025*	61	61	0	12	31
2024	63	63	0	12	34
2023	61	60	1	11	74
2022	61	61	0	12	40
2021	61	61	0	16	35
2020	48	48	0	10	31
2019	62	62	0	12	26
2018	63	63	0	12	30
2017	61	61	0	14	26
2016	61	61	0	15	36
2015	60	60	0	18	50
2014	61	61	0	16	35
2013	61	61	0	17	43
2012	61	61	0	19	37
2011	61	61	0	20	37
2010	61	59	2	23	58

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

Elsewhere in Ohio

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.