Bad Air Days in Salem City, Virginia

Not enough data

EPA monitors in Salem City ran on too few days between 2016 and 2025 to give a fair yearly count (about 32% 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

The worst recent year was 2023, with 1 bad day on 120 monitored days.

Date	AQI	Main pollutant
2023-06-29	146	PM2.5
2023-07-17	95	PM2.5
2021-07-21	91	PM2.5
2025-08-08	76	PM2.5
2018-01-08	75	PM2.5

An ordinary day in Salem City

Across 1,160 monitored days from 2016 to 2025, the air in Salem City rated Good on 78% of them, more often than the 72% typical of monitored counties, and Moderate on 22%. The median day sat at AQI 34; one day in ten went above 55.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%1,160 days

Salem City by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	113	90	23	0	31	76
2024	119	99	20	0	32	67
2023	120	87	32	1	36	146
2022	121	98	23	0	33	66
2021	120	95	25	0	35	91
2020	110	94	16	0	31	69
2019	118	90	28	0	34	65
2018	113	88	25	0	35	75
2017	112	81	31	0	37	69
2016	114	77	37	0	41	70
2015	118	74	44	0	42	92
2014	120	70	50	0	43	67
2013	108	61	47	0	47	82
2012	110	61	49	0	47	68
2011	112	51	61	0	51	78
2010	119	52	67	0	52	80

*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.