EnviroNearby

Sandoval County, New Mexico air quality history

Daily Air Quality Index summaries from EPA monitors in Sandoval, New Mexico, 1981–2025.

73%
Good days in 2025
44
Median daily AQI, 2025
0
Days above 100 in 2025
358
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Sandoval, New Mexico on 358 days. 263 of those days (73%) 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 358 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 77% in 1981–1983 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%1981: Good 182 of 278 days1981: Moderate 94 of 278 days1981: Unhealthy for Sensitive Groups 2 of 278 days19811982: Good 268 of 337 days1982: Moderate 63 of 337 days1982: Unhealthy for Sensitive Groups 6 of 337 days1983: Good 288 of 332 days1983: Moderate 43 of 332 days1983: Unhealthy for Sensitive Groups 1 of 332 days1984: Good 232 of 302 days1984: Moderate 66 of 302 days1984: Unhealthy for Sensitive Groups 4 of 302 days1985: Good 246 of 323 days1985: Moderate 72 of 323 days1985: Unhealthy for Sensitive Groups 5 of 323 days1986: Good 223 of 292 days1986: Moderate 63 of 292 days1986: Unhealthy for Sensitive Groups 6 of 292 days19861987: Good 199 of 354 days1987: Moderate 118 of 354 days1987: Unhealthy for Sensitive Groups 35 of 354 days1987: Unhealthy 2 of 354 days1988: Good 232 of 300 days1988: Moderate 66 of 300 days1988: Unhealthy for Sensitive Groups 2 of 300 days1989: Good 231 of 339 days1989: Moderate 104 of 339 days1989: Unhealthy for Sensitive Groups 4 of 339 days1990: Good 269 of 353 days1990: Moderate 76 of 353 days1990: Unhealthy for Sensitive Groups 8 of 353 days1991: Good 227 of 363 days1991: Moderate 130 of 363 days1991: Unhealthy for Sensitive Groups 6 of 363 days19911992: Good 278 of 360 days1992: Moderate 80 of 360 days1992: Unhealthy for Sensitive Groups 2 of 360 days1993: Good 256 of 365 days1993: Moderate 105 of 365 days1993: Unhealthy for Sensitive Groups 4 of 365 days1994: Good 244 of 365 days1994: Moderate 104 of 365 days1994: Unhealthy for Sensitive Groups 17 of 365 days1995: Good 254 of 364 days1995: Moderate 98 of 364 days1995: Unhealthy for Sensitive Groups 11 of 364 days1995: Unhealthy 1 of 364 days1996: Good 237 of 358 days1996: Moderate 105 of 358 days1996: Unhealthy for Sensitive Groups 16 of 358 days19961997: Good 255 of 365 days1997: Moderate 101 of 365 days1997: Unhealthy for Sensitive Groups 9 of 365 days1998: Good 255 of 365 days1998: Moderate 99 of 365 days1998: Unhealthy for Sensitive Groups 11 of 365 days1999: Good 218 of 365 days1999: Moderate 135 of 365 days1999: Unhealthy for Sensitive Groups 11 of 365 days1999: Unhealthy 1 of 365 days2000: Good 185 of 366 days2000: Moderate 170 of 366 days2000: Unhealthy for Sensitive Groups 11 of 366 days2001: Good 237 of 365 days2001: Moderate 123 of 365 days2001: Unhealthy for Sensitive Groups 5 of 365 days20012002: Good 200 of 365 days2002: Moderate 148 of 365 days2002: Unhealthy for Sensitive Groups 17 of 365 days2003: Good 195 of 365 days2003: Moderate 148 of 365 days2003: Unhealthy for Sensitive Groups 21 of 365 days2003: Unhealthy 1 of 365 days2004: Good 150 of 366 days2004: Moderate 205 of 366 days2004: Unhealthy for Sensitive Groups 11 of 366 days2005: Good 126 of 365 days2005: Moderate 228 of 365 days2005: Unhealthy for Sensitive Groups 11 of 365 days2006: Good 125 of 365 days2006: Moderate 223 of 365 days2006: Unhealthy for Sensitive Groups 17 of 365 days20062007: Good 165 of 365 days2007: Moderate 194 of 365 days2007: Unhealthy for Sensitive Groups 6 of 365 days2008: Good 176 of 366 days2008: Moderate 190 of 366 days2009: Good 249 of 365 days2009: Moderate 116 of 365 days2010: Good 221 of 365 days2010: Moderate 144 of 365 days2011: Good 152 of 365 days2011: Moderate 213 of 365 days20112012: Good 297 of 357 days2012: Moderate 60 of 357 days2013: Good 283 of 351 days2013: Moderate 68 of 351 days2014: Good 294 of 335 days2014: Moderate 41 of 335 days2015: Good 293 of 357 days2015: Moderate 64 of 357 days2016: Good 292 of 361 days2016: Moderate 69 of 361 days20162017: Good 269 of 364 days2017: Moderate 94 of 364 days2017: Unhealthy for Sensitive Groups 1 of 364 days2018: Good 223 of 354 days2018: Moderate 119 of 354 days2018: Unhealthy for Sensitive Groups 12 of 354 days2019: Good 275 of 363 days2019: Moderate 88 of 363 days2020: Good 271 of 358 days2020: Moderate 82 of 358 days2020: Unhealthy for Sensitive Groups 5 of 358 days2021: Good 271 of 357 days2021: Moderate 83 of 357 days2021: Unhealthy for Sensitive Groups 3 of 357 days20212022: Good 295 of 360 days2022: Moderate 64 of 360 days2022: Unhealthy for Sensitive Groups 1 of 360 days2023: Good 270 of 340 days2023: Moderate 70 of 340 days2024: Good 271 of 363 days2024: Moderate 90 of 363 days2024: Unhealthy for Sensitive Groups 2 of 363 days2025: Good 263 of 358 days2025: Moderate 95 of 358 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 year0501001501981: 90th percentile AQI 711982: 90th percentile AQI 671983: 90th percentile AQI 541984: 90th percentile AQI 671985: 90th percentile AQI 711986: 90th percentile AQI 671987: 90th percentile AQI 1011988: 90th percentile AQI 581989: 90th percentile AQI 741990: 90th percentile AQI 671991: 90th percentile AQI 801992: 90th percentile AQI 711993: 90th percentile AQI 711994: 90th percentile AQI 841995: 90th percentile AQI 741996: 90th percentile AQI 841997: 90th percentile AQI 801998: 90th percentile AQI 771999: 90th percentile AQI 802000: 90th percentile AQI 932001: 90th percentile AQI 742002: 90th percentile AQI 902003: 90th percentile AQI 932004: 90th percentile AQI 872005: 90th percentile AQI 872006: 90th percentile AQI 902007: 90th percentile AQI 772008: 90th percentile AQI 732009: 90th percentile AQI 602010: 90th percentile AQI 642011: 90th percentile AQI 672012: 90th percentile AQI 582013: 90th percentile AQI 612014: 90th percentile AQI 512015: 90th percentile AQI 582016: 90th percentile AQI 612017: 90th percentile AQI 712018: 90th percentile AQI 842019: 90th percentile AQI 612020: 90th percentile AQI 612021: 90th percentile AQI 672022: 90th percentile AQI 672023: 90th percentile AQI 642024: 90th percentile AQI 712025: 90th percentile AQI 641981: Median AQI 461982: Median AQI 421983: Median AQI 371984: Median AQI 441985: Median AQI 421986: Median AQI 401987: Median AQI 461988: Median AQI 431989: Median AQI 441990: Median AQI 431991: Median AQI 461992: Median AQI 431993: Median AQI 441994: Median AQI 451995: Median AQI 441996: Median AQI 441997: Median AQI 441998: Median AQI 431999: Median AQI 472000: Median AQI 502001: Median AQI 462002: Median AQI 492003: Median AQI 502004: Median AQI 562005: Median AQI 572006: Median AQI 582007: Median AQI 512008: Median AQI 512009: Median AQI 462010: Median AQI 482011: Median AQI 522012: Median AQI 432013: Median AQI 432014: Median AQI 412015: Median AQI 412016: Median AQI 422017: Median AQI 442018: Median AQI 452019: Median AQI 442020: Median AQI 442021: Median AQI 442022: Median AQI 432023: Median AQI 442024: Median AQI 442025: Median AQI 441981198619911996200120062011201620212025
  • 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
Ozone358100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025358263950000446493Ozone
20243632719020004471122Ozone
2023340270700000446487Ozone
20223602956410004367101Ozone
20213572718330004467119Ozone
20203582718250004461119Ozone
2019363275880000446197Ozone
2018354223119120004584119Ozone
20173642699410004471105Ozone
2016361292690000426190Ozone
2015357293640000415897Ozone
2014335294410000415180Ozone
2013351283680000436197Ozone
20123572976000004358100Ozone
201136515221300005267100Ozone
201036522114400004864100Ozone
20093652491160000466097Ozone
20083661761900000517397Ozone
200736516519460005177149Ozone
2006365125223170005890140Ozone
2005365126228110005787136Ozone
2004366150205110005687122Ozone
2003365195148211005093153Ozone
2002365200148170004990140Ozone
200136523712350004674128Ozone
2000366185170110005093133Ozone
1999365218135111004780154Ozone
199836525599110004377126Ozone
199736525510190004480126Ozone
1996358237105160004484150Ozone
199536425498111004474154Ozone
1994365244104170004584140Ozone
199336525610540004471115Ozone
19923602788020004371112Ozone
199136322713060004680126Ozone
19903532697680004367119Ozone
198933923110440004474140Ozone
19883002326620004358108Ozone
19873541991183520046101179Ozone
19862922236360004067119Ozone
19853232467250004271115Ozone
19843022326640004467126Ozone
19833322884310003754112Ozone
19823372686360004267133Ozone
19812781829420004671101Ozone

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 1981–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem