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

under 1 bad air day a year

Fewer bad air days than most monitored US counties. Ranked 733 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly ozone: summer smog (17% particle days).

The bad-air season here

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

What to buy, and what not to

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.

Better or worse than it was

In 2000 to 2009 this county averaged 24 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 269 monitored days.

Date	AQI	Main pollutant
2023-06-29	166	PM2.5
2023-06-25	119	Ozone
2016-06-14	112	Ozone
2022-06-15	108	Ozone
2023-06-30	105	Ozone

An ordinary day in Wood

Across 2,775 monitored days from 2016 to 2025, the air in Wood County rated Good on 82% of them, more often than the 72% typical of monitored counties, and Moderate on 18%. The median day sat at AQI 40; one day in ten went above 56.

The pollutant setting the AQI on an ordinary day here:

ozone72%1,990 days
fine particles (PM2.5)28%785 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	281	233	48	0	0	39	84
2024	280	219	60	1	0	43	101
2023	269	213	53	3	1	41	166
2022	281	242	38	1	0	39	108
2021	271	221	50	0	0	38	76
2020	283	250	33	0	0	37	80
2019	277	231	46	0	0	40	87
2018	285	243	42	0	0	37	77
2017	283	233	50	0	0	40	84
2016	265	185	79	1	0	43	112
2015	260	176	80	4	0	44	129
2014	255	181	74	0	0	43	100
2013	257	189	66	2	0	43	112
2012	255	142	107	6	0	47	147
2011	257	159	96	2	0	44	147
2010	261	129	125	7	0	51	126

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

Nearby counties on file

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