EnviroNearby

Valencia County, New Mexico air quality history

Daily Air Quality Index summaries from EPA monitors in Valencia, New Mexico, 1988–2025.

75%
Good days in 2025
44
Median daily AQI, 2025
0
Days above 100 in 2025
360
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Valencia, New Mexico on 360 days. 271 of those days (75%) 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 360 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 81% in 1988–1990 versus 80% in 2023–2025.

Years with fewer than 120 monitored days (2006) 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%1988: Good 148 of 167 days1988: Moderate 19 of 167 days19881989: Good 239 of 310 days1989: Moderate 66 of 310 days1989: Unhealthy for Sensitive Groups 5 of 310 days1990: Good 280 of 358 days1990: Moderate 78 of 358 days1991: Good 263 of 358 days1991: Moderate 91 of 358 days1991: Unhealthy for Sensitive Groups 4 of 358 days1992: Good 281 of 348 days1992: Moderate 66 of 348 days1992: Unhealthy for Sensitive Groups 1 of 348 days1993: Good 315 of 345 days1993: Moderate 29 of 345 days1993: Unhealthy for Sensitive Groups 1 of 345 days19931994: Good 341 of 364 days1994: Moderate 23 of 364 days1995: Good 264 of 363 days1995: Moderate 99 of 363 days1996: Good 293 of 364 days1996: Moderate 69 of 364 days1996: Unhealthy for Sensitive Groups 2 of 364 days1997: Good 325 of 361 days1997: Moderate 36 of 361 days1998: Good 240 of 360 days1998: Moderate 119 of 360 days1998: Unhealthy for Sensitive Groups 1 of 360 days19981999: Good 262 of 358 days1999: Moderate 91 of 358 days1999: Unhealthy for Sensitive Groups 5 of 358 days2000: Good 238 of 362 days2000: Moderate 120 of 362 days2000: Unhealthy for Sensitive Groups 4 of 362 days2001: Good 270 of 364 days2001: Moderate 94 of 364 days2002: Good 274 of 354 days2002: Moderate 78 of 354 days2002: Unhealthy for Sensitive Groups 2 of 354 days2003: Good 113 of 167 days2003: Moderate 54 of 167 days20032006: Good 117 of 118 days2006: Moderate 1 of 118 days2007: Good 345 of 358 days2007: Moderate 13 of 358 days2008: Good 346 of 366 days2008: Moderate 20 of 366 days2009: Good 323 of 365 days2009: Moderate 42 of 365 days2010: Good 309 of 365 days2010: Moderate 56 of 365 days20102011: Good 263 of 365 days2011: Moderate 98 of 365 days2011: Unhealthy for Sensitive Groups 4 of 365 days2012: Good 243 of 366 days2012: Moderate 118 of 366 days2012: Unhealthy for Sensitive Groups 5 of 366 days2013: Good 240 of 365 days2013: Moderate 120 of 365 days2013: Unhealthy for Sensitive Groups 5 of 365 days2014: Good 294 of 358 days2014: Moderate 64 of 358 days2015: Good 291 of 356 days2015: Moderate 65 of 356 days20152016: Good 280 of 362 days2016: Moderate 82 of 362 days2017: Good 262 of 361 days2017: Moderate 98 of 361 days2017: Unhealthy for Sensitive Groups 1 of 361 days2018: Good 238 of 359 days2018: Moderate 116 of 359 days2018: Unhealthy for Sensitive Groups 5 of 359 days2019: Good 270 of 357 days2019: Moderate 87 of 357 days2020: Good 283 of 359 days2020: Moderate 74 of 359 days2020: Unhealthy for Sensitive Groups 2 of 359 days20202021: Good 295 of 356 days2021: Moderate 59 of 356 days2021: Unhealthy for Sensitive Groups 2 of 356 days2022: Good 317 of 361 days2022: Moderate 44 of 361 days2023: Good 289 of 361 days2023: Moderate 72 of 361 days2024: Good 300 of 358 days2024: Moderate 56 of 358 days2024: Unhealthy for Sensitive Groups 2 of 358 days2025: Good 271 of 360 days2025: Moderate 89 of 360 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 year0501001988: 90th percentile AQI 511989: 90th percentile AQI 611990: 90th percentile AQI 611991: 90th percentile AQI 741992: 90th percentile AQI 581993: 90th percentile AQI 501994: 90th percentile AQI 491995: 90th percentile AQI 671996: 90th percentile AQI 641997: 90th percentile AQI 501998: 90th percentile AQI 741999: 90th percentile AQI 712000: 90th percentile AQI 772001: 90th percentile AQI 642002: 90th percentile AQI 672003: 90th percentile AQI 672006: 90th percentile AQI 302007: 90th percentile AQI 342008: 90th percentile AQI 412009: 90th percentile AQI 512010: 90th percentile AQI 542011: 90th percentile AQI 672012: 90th percentile AQI 772013: 90th percentile AQI 742014: 90th percentile AQI 582015: 90th percentile AQI 582016: 90th percentile AQI 612017: 90th percentile AQI 672018: 90th percentile AQI 802019: 90th percentile AQI 672020: 90th percentile AQI 612021: 90th percentile AQI 582022: 90th percentile AQI 542023: 90th percentile AQI 612024: 90th percentile AQI 642025: 90th percentile AQI 641988: Median AQI 351989: Median AQI 421990: Median AQI 441991: Median AQI 441992: Median AQI 421993: Median AQI 391994: Median AQI 391995: Median AQI 431996: Median AQI 411997: Median AQI 401998: Median AQI 451999: Median AQI 442000: Median AQI 452001: Median AQI 442002: Median AQI 432003: Median AQI 472006: Median AQI 172007: Median AQI 202008: Median AQI 192009: Median AQI 342010: Median AQI 432011: Median AQI 442012: Median AQI 442013: Median AQI 442014: Median AQI 422015: Median AQI 432016: Median AQI 432017: Median AQI 442018: Median AQI 452019: Median AQI 442020: Median AQI 442021: Median AQI 432022: Median AQI 412023: Median AQI 422024: Median AQI 432025: Median AQI 4419881993199820032010201520202025
  • 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
Ozone360100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025360271890000446497Ozone
20243583005620004364105Ozone
2023361289720000426187Ozone
2022361317440000415493Ozone
20213562955920004358136Ozone
20203592837420004461105Ozone
2019357270870000446793Ozone
201835923811650004580108Ozone
20173612629810004467101Ozone
2016362280820000436197Ozone
2015356291650000435893Ozone
2014358294640000425893Ozone
201336524012050004474115Ozone
201236624311850004477115Ozone
20113652639840004467143Ozone
2010365309560000435487Ozone
2009365323420000345180Ozone
2008366346200000194191PM2.5
2007358345130000203461PM2.5
200611811710000173056PM2.5
2003167113540000476797Ozone
20023542747820004367105Ozone
2001364270940000446497Ozone
200036223812040004577112Ozone
19993582629150004471147Ozone
199836024011910004574101Ozone
1997361325360000405080Ozone
19963642936920004164101Ozone
1995363264990000436797Ozone
1994364341230000394974Ozone
19933453152910003950105Ozone
19923482816610004258112Ozone
19913582639140004474105Ozone
1990358280780000446197Ozone
19893102396650004261108Ozone
1988167148190000355177Ozone

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 1988–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem