Catron County, New Mexico air quality history

Daily Air Quality Index summaries from EPA monitors in Catron, New Mexico, 1984–2025.

72%

Good days in 2025

Median daily AQI, 2025

Days above 100 in 2025

226

Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Catron, New Mexico on 226 days. 162 of those days (72%) were in the Good range, and the median daily AQI was 45. That median is about the same as the typical monitored county in New Mexico (median 44 across 13 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 196 days.

EPA did not report an AQI for every day of 2025 here (226 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

Years with fewer than 120 monitored days (2018, 2019, 2020, 2021, 2022, 2023…) 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
Ozone	196	87%
Fine particles (PM2.5)	30	13%

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	226	162	64	0	0	45	74	100	Ozone
2024	196	175	21	0	0	39	54	80	Ozone
2023	119	108	10	0	1	13	49	175	PM2.5
2022	114	112	2	0	0	12	27	66	PM2.5
2021	112	103	9	0	0	14	41	89	PM2.5
2020	115	109	6	0	0	13	41	81	PM2.5
2019	111	111	0	0	0	12	24	42	PM2.5
2018	117	117	0	0	0	11	28	49	PM2.5
2017	114	110	2	2	0	12	32	129	PM2.5
2016	108	104	4	0	0	12	27	62	PM2.5
2015	112	111	1	0	0	13	23	74	PM2.5
2014	115	114	1	0	0	14	27	66	PM2.5
2013	103	101	2	0	0	13	33	68	PM2.5
2012	109	107	2	0	0	17	33	67	PM2.5
2011	90	87	3	0	0	14	36	62	PM2.5
2010	112	111	1	0	0	13	23	75	PM2.5
2009	115	113	2	0	0	14	31	51	PM2.5
2008	105	103	2	0	0	14	32	53	PM2.5
2007	107	105	2	0	0	13	30	88	PM2.5
2006	110	108	2	0	0	13	29	94	PM2.5
2005	115	112	3	0	0	13	34	61	PM2.5
2004	112	110	2	0	0	13	27	60	PM2.5
2003	91	87	4	0	0	14	35	59	PM2.5
2002	112	112	0	0	0	17	33	47	PM2.5
2001	103	101	2	0	0	17	31	66	PM2.5
2000	71	64	7	0	0	19	48	80	PM2.5
1999	93	92	1	0	0	19	33	53	PM2.5
1998	101	95	6	0	0	18	41	73	PM2.5
1997	103	96	7	0	0	21	41	85	PM2.5
1996	100	95	5	0	0	18	36	83	PM2.5
1995	100	95	5	0	0	20	45	59	PM2.5
1994	75	71	4	0	0	24	36	53	PM2.5
1986	83	83	0	0	0	1	5	14	NO2
1985	259	259	0	0	0	1	5	22	NO2
1984	174	174	0	0	0	1	7	20	NO2

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 New Mexico with a similar median AQI in 2025

All monitored counties in New Mexico

Source: U.S. EPA AirData, “Annual AQI by County” files for 1984–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem