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

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 844 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly particles: smoke and dust (100% particle days).

The bad-air season here

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

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

In 2000 to 2009 this county averaged 6 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2023, with 3 bad days on 362 monitored days.

Date	AQI	Main pollutant
2023-06-29	183	PM2.5
2023-06-28	136	PM10
2023-07-17	114	PM2.5
2019-02-02	112	PM2.5
2019-12-23	93	PM2.5

An ordinary day in Brooke

Across 3,578 monitored days from 2016 to 2025, the air in Brooke County rated Good on 82% of them, more often than the 72% typical of monitored counties, and Moderate on 17%. The median day sat at AQI 22; one day in ten went above 55.

The pollutant setting the AQI on an ordinary day here:

coarse dust (PM10)54%1,933 days
fine particles (PM2.5)46%1,639 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	308	225	83	0	0	36	80
2024	366	277	89	0	0	36	72
2023	362	316	43	3	1	19	183
2022	363	321	42	0	0	18	76
2021	362	295	67	0	0	21	83
2020	366	318	48	0	0	18	78
2019	360	287	72	1	0	19	112
2018	362	308	54	0	0	19	75
2017	363	297	66	0	0	18	74
2016	366	304	62	0	0	19	80
2015	365	295	70	0	0	17	92
2014	365	293	72	0	0	17	93
2013	365	291	74	0	0	16	97
2012	358	276	82	0	0	20	85
2011	283	200	82	1	0	21	111
2010	365	261	102	2	0	21	107

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

Elsewhere in West Virginia

Ohio County1/yr
Berkeley County1/yr
Hancock Countyunder 1/yr
Wood Countyunder 1/yr
Marshall Countyunder 1/yr
Kanawha Countyunder 1/yr
Cabell 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.