Bad Air Days in Cabell County, West Virginia: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 825 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly ozone: summer smog (25% particle days).

The bad-air season here

Most bad days here fall in April and June. Averaged over 2016 to 2025.

What actually helps 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

In 2000 to 2009 this county averaged 28 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2017, with 2 bad days on 283 monitored days.

Date	AQI	Main pollutant
2023-06-29	144	PM2.5
2016-06-14	129	Ozone
2017-04-13	101	Ozone
2017-04-14	101	Ozone
2018-06-16	100	Ozone

An ordinary day in Cabell

Across 2,954 monitored days from 2016 to 2025, the air in Cabell County rated Good on 79% of them, more often than the 72% typical of monitored counties, and Moderate on 21%. The median day sat at AQI 40; one day in ten went above 57.

The pollutant setting the AQI on an ordinary day here:

ozone63%1,863 days
fine particles (PM2.5)37%1,091 days

Cabell County by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	364	253	111	0	0	42	92
2024	366	253	113	0	0	43	87
2023	273	210	62	1	0	44	144
2022	282	247	35	0	0	39	93
2021	283	232	51	0	0	38	87
2020	284	252	32	0	0	37	100
2019	275	233	42	0	0	40	71
2018	282	229	53	0	0	39	100
2017	283	233	48	2	0	41	101
2016	262	202	59	1	0	40	129
2015	259	178	80	1	0	43	101
2014	264	196	67	1	0	42	101
2013	255	188	67	0	0	42	77
2012	245	140	97	8	1	48	159
2011	261	151	105	5	0	47	133
2010	264	139	122	3	0	49	119

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

West Virginia compared

Ohio County1/yr
Berkeley County1/yr
Hancock Countyunder 1/yr
Wood Countyunder 1/yr
Marshall Countyunder 1/yr
Kanawha Countyunder 1/yr
Brooke Countyunder 1/yr
Marion Countythin data

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, and on why a purifier does not touch ozone in smoke vs ozone.