Bad Air Days in Wythe County, Virginia: 0 a Year

0 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 990 of 996 monitored counties, where 1 is worst.

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 record for Wythe

In 2000 to 2009 this county averaged 15 bad days a year; in 2016 to 2025, 0. The air has improved.

Date	AQI	Main pollutant
2016-04-19	100	Ozone
2023-06-02	87	Ozone
2016-05-25	84	Ozone
2018-05-03	84	Ozone
2023-04-20	84	Ozone

An ordinary day in Wythe

Across 2,382 monitored days from 2016 to 2025, the air in Wythe County rated Good on 94% of them, more often than the 72% typical of monitored counties, and Moderate on 6%. The median day sat at AQI 39; one day in ten went above 49.

The pollutant setting the AQI on an ordinary day here:

ozone100%2,382 days

Wythe County by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	239	225	14	0	39	77
2024	245	236	9	0	41	67
2023	244	224	20	0	40	87
2022	245	232	13	0	39	77
2021	242	228	14	0	39	71
2020	235	233	2	0	34	61
2019	242	232	10	0	41	71
2018	237	207	30	0	40	84
2017	245	231	14	0	40	77
2016	208	191	17	0	41	100
2015	211	196	15	0	38	74
2014	213	193	20	0	40	87
2013	213	205	8	0	39	87
2012	178	139	36	3	44	133
2011	214	167	47	0	45	100
2010	214	162	50	2	44	105

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

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.