EnviroNearby

Taos County, New Mexico air quality history

Daily Air Quality Index summaries from EPA monitors in Taos, New Mexico, 1989–2025.

99%
Good days in 2025
16
Median daily AQI, 2025
0
Days above 100 in 2025
356
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Taos, New Mexico on 356 days. 352 of those days (99%) were in the Good range, and the median daily AQI was 16. That median is lower than the typical monitored county in New Mexico (median 44 across 13 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 356 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 97% in 1990–1992 versus 97% in 2023–2025.

Years with fewer than 120 monitored days (1989) 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.

Share of monitored days in each AQI category, by year0%25%50%75%100%1989: Good 30 of 41 days1989: Moderate 11 of 41 days19891990: Good 164 of 171 days1990: Moderate 7 of 171 days1991: Good 181 of 184 days1991: Moderate 3 of 184 days1992: Good 166 of 171 days1992: Moderate 5 of 171 days1993: Good 246 of 251 days1993: Moderate 5 of 251 days1994: Good 333 of 338 days1994: Moderate 5 of 338 days19941995: Good 313 of 319 days1995: Moderate 6 of 319 days1996: Good 289 of 317 days1996: Moderate 28 of 317 days1997: Good 354 of 363 days1997: Moderate 9 of 363 days1998: Good 359 of 363 days1998: Moderate 4 of 363 days1999: Good 163 of 163 days19992000: Good 202 of 218 days2000: Moderate 16 of 218 days2001: Good 134 of 134 days2002: Good 289 of 319 days2002: Moderate 29 of 319 days2002: Unhealthy for Sensitive Groups 1 of 319 days2003: Good 343 of 363 days2003: Moderate 20 of 363 days2004: Good 343 of 355 days2004: Moderate 12 of 355 days20042005: Good 343 of 356 days2005: Moderate 13 of 356 days2006: Good 319 of 352 days2006: Moderate 33 of 352 days2007: Good 328 of 361 days2007: Moderate 33 of 361 days2008: Good 341 of 365 days2008: Moderate 24 of 365 days2009: Good 343 of 360 days2009: Moderate 17 of 360 days20092010: Good 347 of 355 days2010: Moderate 8 of 355 days2011: Good 325 of 364 days2011: Moderate 39 of 364 days2012: Good 355 of 366 days2012: Moderate 11 of 366 days2013: Good 331 of 359 days2013: Moderate 28 of 359 days2014: Good 349 of 356 days2014: Moderate 7 of 356 days20142015: Good 358 of 363 days2015: Moderate 5 of 363 days2016: Good 349 of 362 days2016: Moderate 13 of 362 days2017: Good 328 of 352 days2017: Moderate 24 of 352 days2018: Good 319 of 365 days2018: Moderate 46 of 365 days2019: Good 315 of 358 days2019: Moderate 43 of 358 days20192020: Good 310 of 360 days2020: Moderate 50 of 360 days2021: Good 290 of 323 days2021: Moderate 32 of 323 days2021: Unhealthy for Sensitive Groups 1 of 323 days2022: Good 323 of 359 days2022: Moderate 36 of 359 days2023: Good 332 of 350 days2023: Moderate 18 of 350 days2024: Good 354 of 365 days2024: Moderate 11 of 365 days20242025: Good 352 of 356 days2025: Moderate 4 of 356 days2025
  • 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 and 90th-percentile daily AQI, by year0501001989: 90th percentile AQI 581990: 90th percentile AQI 371991: 90th percentile AQI 341992: 90th percentile AQI 371993: 90th percentile AQI 271994: 90th percentile AQI 311995: 90th percentile AQI 271996: 90th percentile AQI 461997: 90th percentile AQI 331998: 90th percentile AQI 291999: 90th percentile AQI 192000: 90th percentile AQI 482001: 90th percentile AQI 202002: 90th percentile AQI 482003: 90th percentile AQI 392004: 90th percentile AQI 412005: 90th percentile AQI 392006: 90th percentile AQI 502007: 90th percentile AQI 482008: 90th percentile AQI 452009: 90th percentile AQI 412010: 90th percentile AQI 362011: 90th percentile AQI 512012: 90th percentile AQI 392013: 90th percentile AQI 462014: 90th percentile AQI 342015: 90th percentile AQI 332016: 90th percentile AQI 332017: 90th percentile AQI 382018: 90th percentile AQI 522019: 90th percentile AQI 532020: 90th percentile AQI 532021: 90th percentile AQI 512022: 90th percentile AQI 512023: 90th percentile AQI 432024: 90th percentile AQI 352025: 90th percentile AQI 321989: Median AQI 361990: Median AQI 191991: Median AQI 171992: Median AQI 191993: Median AQI 111994: Median AQI 121995: Median AQI 111996: Median AQI 181997: Median AQI 151998: Median AQI 151999: Median AQI 112000: Median AQI 302001: Median AQI 112002: Median AQI 252003: Median AQI 222004: Median AQI 202005: Median AQI 212006: Median AQI 272007: Median AQI 232008: Median AQI 222009: Median AQI 202010: Median AQI 192011: Median AQI 192012: Median AQI 222013: Median AQI 202014: Median AQI 192015: Median AQI 172016: Median AQI 162017: Median AQI 162018: Median AQI 302019: Median AQI 212020: Median AQI 272021: Median AQI 282022: Median AQI 192023: Median AQI 202024: Median AQI 162025: Median AQI 16198919941999200420092014201920242025
  • 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.

PollutantDays as main pollutantShare of monitored days
Fine particles (PM2.5)356100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202535635240000163252PM2.5
2024365354110000163576PM2.5
2023350332180000204367PM2.5
2022359323360000195186PM2.5
20213232903210002851108PM2.5
2020360310500000275368PM2.5
2019358315430000215373PM2.5
2018365319460000305269PM2.5
2017352328240000163863PM2.5
2016362349130000163359PM2.5
201536335850000173367PM2.5
201435634970000193459PM2.5
2013359331280000204660PM2.5
2012366355110000223959PM2.5
2011364325390000195187PM2.5
201035534780000193666PM2.5
2009360343170000204160PM2.5
2008365341240000224564PM2.5
2007361328330000234863PM2.5
2006352319330000275068PM2.5
2005356343130000213967PM2.5
2004355343120000204159PM2.5
2003363343200000223978PM2.5
20023192892910002548114PM2.5
200113413400000112033PM10
2000218202160000304859PM2.5
199916316300000111935PM10
199836335940000152964PM10
199736335490000153357PM10
1996317289280000184676PM10
199531931360000112767PM10
199433833350000123172PM10
199325124650000112761PM10
199217116650000193767PM10
199118418130000173467PM10
199017116470000193758PM10
19894130110000365876PM10

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 1989–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem