Bad Air Days in Davidson County, North Carolina: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 885 of 996 monitored counties, where 1 is worst.

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

Which months to watch

Most bad days here fall in July 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.

Better or worse than it was

In 2000 to 2009 this county averaged 5 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	126	PM2.5
2023-07-18	118	PM2.5
2023-07-17	115	PM2.5
2021-07-21	97	PM2.5
2020-06-28	96	PM2.5

Most days, not the worst ones

Across 3,514 monitored days from 2016 to 2025, the air in Davidson County rated Good on 56% of them, less often than the 72% typical of monitored counties, and Moderate on 44%. The median day sat at AQI 47; one day in ten went above 61.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%3,514 days

Davidson County by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	343	157	186	0	51	93
2024	359	229	130	0	43	89
2023	362	195	164	3	47	126
2022	354	196	158	0	47	86
2021	343	190	153	0	47	97
2020	329	206	123	0	43	96
2019	350	199	151	0	47	92
2018	353	185	168	0	49	79
2017	359	207	152	0	46	76
2016	362	199	163	0	47	94
2015	352	125	227	0	54	85
2014	341	131	210	0	53	83
2013	357	164	193	0	52	80
2012	360	122	238	0	53	82
2011	360	117	243	0	55	82
2010	352	123	229	0	54	90

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

North Carolina compared

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.