Davidson County, North Carolina air quality history

Daily Air Quality Index summaries from EPA monitors in Davidson, North Carolina, 1992–2025.

46%

Good days in 2025

Median daily AQI, 2025

Days above 100 in 2025

343

Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Davidson, North Carolina on 343 days. 157 of those days (46%) were in the Good range, and the median daily AQI was 51. That median is higher than the typical monitored county in North Carolina (median 39 across 33 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 343 days. Across the years with fuller monitoring, the share of Good days rose: an average of 16% in 2004–2006 versus 54% in 2023–2025.

Years with fewer than 120 monitored days (1998, 1999, 2000, 2001, 2002, 2003…) are shown in the table but left out of comparisons and trend statements.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median daily AQI
90th-percentile daily AQI

Main pollutant by day, 2025

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

Pollutant	Days as main pollutant	Share of monitored days
Fine particles (PM2.5)	343	100%

Year-by-year data

Annual AQI summary by year
Year	Days with AQI	Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Median AQI	90th pct.	Max AQI	Main pollutant
2025	343	157	186	0	0	51	61	93	PM2.5
2024	359	229	130	0	0	43	59	89	PM2.5
2023	362	195	164	3	0	47	63	126	PM2.5
2022	354	196	158	0	0	47	61	86	PM2.5
2021	343	190	153	0	0	47	62	97	PM2.5
2020	329	206	123	0	0	43	60	96	PM2.5
2019	350	199	151	0	0	47	61	92	PM2.5
2018	353	185	168	0	0	49	61	79	PM2.5
2017	359	207	152	0	0	46	60	76	PM2.5
2016	362	199	163	0	0	47	61	94	PM2.5
2015	352	125	227	0	0	54	66	85	PM2.5
2014	341	131	210	0	0	53	64	83	PM2.5
2013	357	164	193	0	0	52	64	80	PM2.5
2012	360	122	238	0	0	53	63	82	PM2.5
2011	360	117	243	0	0	55	67	82	PM2.5
2010	352	123	229	0	0	54	67	90	PM2.5
2009	360	142	218	0	0	53	66	83	PM2.5
2008	354	107	246	1	0	57	73	141	PM2.5
2007	348	93	253	2	0	58	79	125	PM2.5
2006	352	61	284	6	1	61	84	171	PM2.5
2005	124	19	101	4	0	64	89	116	PM2.5
2004	128	20	106	2	0	62	85	125	PM2.5
2003	118	27	88	3	0	60	81	126	PM2.5
2002	115	24	89	2	0	60	81	121	PM2.5
2001	114	26	85	3	0	61	81	116	PM2.5
2000	114	15	96	3	0	65	86	129	PM2.5
1999	111	26	81	4	0	61	90	124	PM2.5
1998	57	55	2	0	0	23	36	51	PM10
1997	61	59	2	0	0	21	38	57	PM10
1996	61	61	0	0	0	23	38	46	PM10
1995	61	59	2	0	0	25	36	54	PM10
1994	61	60	1	0	0	24	34	64	PM10
1993	61	60	1	0	0	27	42	52	PM10
1992	19	19	0	0	0	24	34	47	PM10

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in North Carolina with a similar median AQI in 2025

All monitored counties in North Carolina

Source: U.S. EPA AirData, “Annual AQI by County” files for 1992–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem