EnviroNearby

Santa Fe County, New Mexico air quality history

Daily Air Quality Index summaries from EPA monitors in Santa Fe, New Mexico, 1980–2025.

78%
Good days in 2025
44
Median daily AQI, 2025
0
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Santa Fe, New Mexico on 365 days. 286 of those days (78%) were in the Good range, and the median daily AQI was 44. 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 324 days. Across the years with fuller monitoring, the share of Good days fell: an average of 97% in 1980–1982 versus 76% in 2023–2025.

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%1980: Good 348 of 366 days1980: Moderate 18 of 366 days19801981: Good 357 of 365 days1981: Moderate 8 of 365 days1982: Good 355 of 365 days1982: Moderate 10 of 365 days1983: Good 352 of 364 days1983: Moderate 12 of 364 days1984: Good 343 of 359 days1984: Moderate 16 of 359 days1985: Good 349 of 353 days1985: Moderate 4 of 353 days19851986: Good 344 of 350 days1986: Moderate 6 of 350 days1987: Good 360 of 362 days1987: Moderate 2 of 362 days1988: Good 358 of 359 days1988: Moderate 1 of 359 days1989: Good 346 of 346 days1990: Good 365 of 365 days19901991: Good 365 of 365 days1992: Good 361 of 364 days1992: Moderate 3 of 364 days1993: Good 364 of 365 days1993: Moderate 1 of 365 days1994: Good 351 of 351 days1995: Good 365 of 365 days19951996: Good 366 of 366 days1997: Good 361 of 362 days1997: Moderate 1 of 362 days1998: Good 365 of 365 days1999: Good 359 of 365 days1999: Moderate 6 of 365 days2000: Good 360 of 366 days2000: Moderate 6 of 366 days20002001: Good 360 of 365 days2001: Moderate 5 of 365 days2002: Good 352 of 359 days2002: Moderate 7 of 359 days2003: Good 353 of 364 days2003: Moderate 11 of 364 days2004: Good 360 of 366 days2004: Moderate 6 of 366 days2005: Good 355 of 365 days2005: Moderate 10 of 365 days20052006: Good 358 of 365 days2006: Moderate 7 of 365 days2007: Good 321 of 365 days2007: Moderate 44 of 365 days2008: Good 295 of 366 days2008: Moderate 71 of 366 days2009: Good 312 of 365 days2009: Moderate 53 of 365 days2010: Good 304 of 365 days2010: Moderate 60 of 365 days2010: Unhealthy for Sensitive Groups 1 of 365 days20102011: Good 289 of 365 days2011: Moderate 75 of 365 days2011: Unhealthy for Sensitive Groups 1 of 365 days2012: Good 247 of 366 days2012: Moderate 118 of 366 days2012: Unhealthy for Sensitive Groups 1 of 366 days2013: Good 264 of 365 days2013: Moderate 101 of 365 days2014: Good 305 of 365 days2014: Moderate 60 of 365 days2015: Good 308 of 365 days2015: Moderate 57 of 365 days20152016: Good 300 of 366 days2016: Moderate 66 of 366 days2017: Good 282 of 365 days2017: Moderate 83 of 365 days2018: Good 276 of 365 days2018: Moderate 86 of 365 days2018: Unhealthy for Sensitive Groups 3 of 365 days2019: Good 273 of 362 days2019: Moderate 88 of 362 days2019: Unhealthy for Sensitive Groups 1 of 362 days2020: Good 287 of 366 days2020: Moderate 78 of 366 days2020: Unhealthy for Sensitive Groups 1 of 366 days20202021: Good 275 of 364 days2021: Moderate 87 of 364 days2021: Unhealthy for Sensitive Groups 2 of 364 days2022: Good 284 of 365 days2022: Moderate 81 of 365 days2023: Good 284 of 362 days2023: Moderate 78 of 362 days2024: Good 259 of 363 days2024: Moderate 103 of 363 days2024: Unhealthy for Sensitive Groups 1 of 363 days2025: Good 286 of 365 days2025: Moderate 79 of 365 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 year0501001980: 90th percentile AQI 431981: 90th percentile AQI 411982: 90th percentile AQI 361983: 90th percentile AQI 381984: 90th percentile AQI 381985: 90th percentile AQI 341986: 90th percentile AQI 381987: 90th percentile AQI 321988: 90th percentile AQI 281989: 90th percentile AQI 261990: 90th percentile AQI 271991: 90th percentile AQI 221992: 90th percentile AQI 251993: 90th percentile AQI 221994: 90th percentile AQI 211995: 90th percentile AQI 191996: 90th percentile AQI 191997: 90th percentile AQI 171998: 90th percentile AQI 181999: 90th percentile AQI 312000: 90th percentile AQI 332001: 90th percentile AQI 302002: 90th percentile AQI 292003: 90th percentile AQI 352004: 90th percentile AQI 352005: 90th percentile AQI 372006: 90th percentile AQI 342007: 90th percentile AQI 512008: 90th percentile AQI 612009: 90th percentile AQI 542010: 90th percentile AQI 542011: 90th percentile AQI 612012: 90th percentile AQI 712013: 90th percentile AQI 672014: 90th percentile AQI 582015: 90th percentile AQI 582016: 90th percentile AQI 612017: 90th percentile AQI 612018: 90th percentile AQI 672019: 90th percentile AQI 672020: 90th percentile AQI 582021: 90th percentile AQI 642022: 90th percentile AQI 612023: 90th percentile AQI 642024: 90th percentile AQI 712025: 90th percentile AQI 581980: Median AQI 241981: Median AQI 201982: Median AQI 181983: Median AQI 201984: Median AQI 201985: Median AQI 181986: Median AQI 161987: Median AQI 171988: Median AQI 151989: Median AQI 171990: Median AQI 151991: Median AQI 131992: Median AQI 141993: Median AQI 131994: Median AQI 111995: Median AQI 111996: Median AQI 111997: Median AQI 91998: Median AQI 101999: Median AQI 132000: Median AQI 132001: Median AQI 122002: Median AQI 92003: Median AQI 132004: Median AQI 212005: Median AQI 192006: Median AQI 202007: Median AQI 322008: Median AQI 432009: Median AQI 422010: Median AQI 442011: Median AQI 442012: Median AQI 452013: Median AQI 442014: Median AQI 432015: Median AQI 422016: Median AQI 432017: Median AQI 442018: Median AQI 442019: Median AQI 442020: Median AQI 442021: Median AQI 442022: Median AQI 442023: Median AQI 442024: Median AQI 452025: Median AQI 441980198519901995200020052010201520202025
  • 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
Ozone32489%
Fine particles (PM2.5)4111%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025365286790000445893Ozone
202436325910310004571101Ozone
2023362284780000446484Ozone
2022365284810000446198Ozone
20213642758720004464113Ozone
20203662877810004458101Ozone
20193622738810004467101Ozone
20183652768630004467122Ozone
20173652828300004461100Ozone
2016366300660000436190Ozone
2015365308570000425880Ozone
2014365305600000435887Ozone
201336526410100004467100Ozone
201236624711810004571108Ozone
20113652897510004461109Ozone
20103653046010004454101Ozone
2009365312530000425484Ozone
20083662957100004361100Ozone
2007365321440000325187PM2.5
200636535870000203463PM2.5
2005365355100000193758PM2.5
200436636060000213568PM2.5
2003364353110000133571PM2.5
20023593527000092969CO
200136536050000123055CO
200036636060000133359PM2.5
199936535960000133159CO
199836536500000101833CO
19973623611000091759CO
199636636600000111932CO
199536536500000111933CO
199435135100000112131CO
199336536410000132254CO
199236436130000142556CO
199136536500000132249CO
199036536500000152750CO
198934634600000172645CO
198835935810000152859CO
198736236020000173252CO
198635034460000163864CO
198535334940000183462CO
1984359343160000203884CO
1983364352120000203867CO
1982365355100000183671CO
198136535780000204175CO
1980366348180000244372CO

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 1980–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem