EnviroNearby

El Paso County, Colorado air quality history

Daily Air Quality Index summaries from EPA monitors in El Paso, Colorado, 1980–2025.

68%
Good days in 2025
46
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 El Paso, Colorado on 365 days. 249 of those days (68%) were in the Good range, and the median daily AQI was 46. That median is about the same as the typical monitored county in Colorado (median 46 across 27 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 341 days. Across the years with fuller monitoring, the share of Good days rose: an average of 53% in 1980–1982 versus 63% 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 147 of 366 days1980: Moderate 197 of 366 days1980: Unhealthy for Sensitive Groups 22 of 366 days19801981: Good 225 of 365 days1981: Moderate 127 of 365 days1981: Unhealthy for Sensitive Groups 13 of 365 days1982: Good 210 of 365 days1982: Moderate 139 of 365 days1982: Unhealthy for Sensitive Groups 10 of 365 days1982: Unhealthy 4 of 365 days1982: Very Unhealthy 2 of 365 days1983: Good 183 of 365 days1983: Moderate 162 of 365 days1983: Unhealthy for Sensitive Groups 18 of 365 days1983: Unhealthy 2 of 365 days1984: Good 157 of 366 days1984: Moderate 189 of 366 days1984: Unhealthy for Sensitive Groups 20 of 366 days1985: Good 269 of 363 days1985: Moderate 89 of 363 days1985: Unhealthy for Sensitive Groups 5 of 363 days19851986: Good 258 of 365 days1986: Moderate 105 of 365 days1986: Unhealthy for Sensitive Groups 2 of 365 days1987: Good 250 of 365 days1987: Moderate 114 of 365 days1987: Unhealthy for Sensitive Groups 1 of 365 days1988: Good 202 of 366 days1988: Moderate 152 of 366 days1988: Unhealthy for Sensitive Groups 11 of 366 days1988: Unhealthy 1 of 366 days1989: Good 171 of 365 days1989: Moderate 181 of 365 days1989: Unhealthy for Sensitive Groups 12 of 365 days1989: Unhealthy 1 of 365 days1990: Good 210 of 365 days1990: Moderate 145 of 365 days1990: Unhealthy for Sensitive Groups 10 of 365 days19901991: Good 187 of 365 days1991: Moderate 166 of 365 days1991: Unhealthy for Sensitive Groups 12 of 365 days1992: Good 269 of 366 days1992: Moderate 97 of 366 days1993: Good 262 of 365 days1993: Moderate 101 of 365 days1993: Unhealthy for Sensitive Groups 2 of 365 days1994: Good 255 of 365 days1994: Moderate 107 of 365 days1994: Unhealthy for Sensitive Groups 3 of 365 days1995: Good 252 of 365 days1995: Moderate 88 of 365 days1995: Unhealthy for Sensitive Groups 25 of 365 days19951996: Good 272 of 366 days1996: Moderate 72 of 366 days1996: Unhealthy for Sensitive Groups 22 of 366 days1997: Good 306 of 365 days1997: Moderate 57 of 365 days1997: Unhealthy for Sensitive Groups 2 of 365 days1998: Good 298 of 365 days1998: Moderate 66 of 365 days1998: Unhealthy for Sensitive Groups 1 of 365 days1999: Good 301 of 365 days1999: Moderate 62 of 365 days1999: Unhealthy for Sensitive Groups 2 of 365 days2000: Good 175 of 366 days2000: Moderate 167 of 366 days2000: Unhealthy for Sensitive Groups 24 of 366 days20002001: Good 237 of 365 days2001: Moderate 125 of 365 days2001: Unhealthy for Sensitive Groups 3 of 365 days2002: Good 223 of 365 days2002: Moderate 135 of 365 days2002: Unhealthy for Sensitive Groups 7 of 365 days2003: Good 243 of 365 days2003: Moderate 109 of 365 days2003: Unhealthy for Sensitive Groups 13 of 365 days2004: Good 268 of 366 days2004: Moderate 95 of 366 days2004: Unhealthy for Sensitive Groups 3 of 366 days2005: Good 236 of 365 days2005: Moderate 115 of 365 days2005: Unhealthy for Sensitive Groups 13 of 365 days2005: Unhealthy 1 of 365 days20052006: Good 207 of 365 days2006: Moderate 142 of 365 days2006: Unhealthy for Sensitive Groups 16 of 365 days2007: Good 216 of 365 days2007: Moderate 139 of 365 days2007: Unhealthy for Sensitive Groups 10 of 365 days2008: Good 242 of 366 days2008: Moderate 118 of 366 days2008: Unhealthy for Sensitive Groups 6 of 366 days2009: Good 291 of 365 days2009: Moderate 73 of 365 days2009: Unhealthy for Sensitive Groups 1 of 365 days2010: Good 254 of 365 days2010: Moderate 107 of 365 days2010: Unhealthy for Sensitive Groups 3 of 365 days2010: Unhealthy 1 of 365 days20102011: Good 225 of 365 days2011: Moderate 130 of 365 days2011: Unhealthy for Sensitive Groups 10 of 365 days2012: Good 208 of 366 days2012: Moderate 138 of 366 days2012: Unhealthy for Sensitive Groups 20 of 366 days2013: Good 228 of 365 days2013: Moderate 127 of 365 days2013: Unhealthy for Sensitive Groups 10 of 365 days2014: Good 273 of 365 days2014: Moderate 92 of 365 days2015: Good 283 of 365 days2015: Moderate 81 of 365 days2015: Unhealthy for Sensitive Groups 1 of 365 days20152016: Good 253 of 366 days2016: Moderate 111 of 366 days2016: Unhealthy for Sensitive Groups 2 of 366 days2017: Good 223 of 365 days2017: Moderate 139 of 365 days2017: Unhealthy for Sensitive Groups 3 of 365 days2018: Good 217 of 365 days2018: Moderate 140 of 365 days2018: Unhealthy for Sensitive Groups 8 of 365 days2019: Good 249 of 365 days2019: Moderate 116 of 365 days2020: Good 241 of 366 days2020: Moderate 118 of 366 days2020: Unhealthy for Sensitive Groups 6 of 366 days2020: Unhealthy 1 of 366 days20202021: Good 224 of 365 days2021: Moderate 113 of 365 days2021: Unhealthy for Sensitive Groups 28 of 365 days2022: Good 249 of 365 days2022: Moderate 114 of 365 days2022: Unhealthy for Sensitive Groups 2 of 365 days2023: Good 240 of 365 days2023: Moderate 123 of 365 days2023: Unhealthy for Sensitive Groups 1 of 365 days2023: Unhealthy 1 of 365 days2024: Good 202 of 366 days2024: Moderate 150 of 366 days2024: Unhealthy for Sensitive Groups 12 of 366 days2024: Unhealthy 2 of 366 days2025: Good 249 of 365 days2025: Moderate 116 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 911981: 90th percentile AQI 771982: 90th percentile AQI 791983: 90th percentile AQI 861984: 90th percentile AQI 871985: 90th percentile AQI 691986: 90th percentile AQI 691987: 90th percentile AQI 711988: 90th percentile AQI 711989: 90th percentile AQI 791990: 90th percentile AQI 721991: 90th percentile AQI 791992: 90th percentile AQI 621993: 90th percentile AQI 631994: 90th percentile AQI 621995: 90th percentile AQI 711996: 90th percentile AQI 641997: 90th percentile AQI 541998: 90th percentile AQI 561999: 90th percentile AQI 602000: 90th percentile AQI 932001: 90th percentile AQI 712002: 90th percentile AQI 772003: 90th percentile AQI 772004: 90th percentile AQI 622005: 90th percentile AQI 772006: 90th percentile AQI 872007: 90th percentile AQI 802008: 90th percentile AQI 772009: 90th percentile AQI 582010: 90th percentile AQI 742011: 90th percentile AQI 842012: 90th percentile AQI 902013: 90th percentile AQI 842014: 90th percentile AQI 642015: 90th percentile AQI 642016: 90th percentile AQI 672017: 90th percentile AQI 712018: 90th percentile AQI 842019: 90th percentile AQI 672020: 90th percentile AQI 742021: 90th percentile AQI 932022: 90th percentile AQI 742023: 90th percentile AQI 672024: 90th percentile AQI 802025: 90th percentile AQI 671980: Median AQI 571981: Median AQI 471982: Median AQI 481983: Median AQI 501984: Median AQI 531985: Median AQI 441986: Median AQI 441987: Median AQI 461988: Median AQI 501989: Median AQI 511990: Median AQI 481991: Median AQI 501992: Median AQI 451993: Median AQI 451994: Median AQI 471995: Median AQI 461996: Median AQI 441997: Median AQI 421998: Median AQI 431999: Median AQI 432000: Median AQI 522001: Median AQI 462002: Median AQI 452003: Median AQI 452004: Median AQI 442005: Median AQI 452006: Median AQI 472007: Median AQI 472008: Median AQI 452009: Median AQI 432010: Median AQI 462011: Median AQI 472012: Median AQI 482013: Median AQI 472014: Median AQI 452015: Median AQI 442016: Median AQI 462017: Median AQI 472018: Median AQI 472019: Median AQI 462020: Median AQI 462021: Median AQI 472022: Median AQI 462023: Median AQI 472024: Median AQI 492025: Median AQI 461980198519901995200020052010201520202025
  • 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
Ozone34193%
Fine particles (PM2.5)226%
Coarse particles (PM10)21%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652491160000466797Ozone
2024366202150122004980166Ozone
202336524012311004767154Ozone
202236524911420004674115Ozone
2021365224113280004793140Ozone
202036624111861004674151Ozone
201936524911600004667100Ozone
201836521714080004784119Ozone
201736522313930004771116Ozone
201636625311120004667126Ozone
20153652838110004464105Ozone
2014365273920000456490Ozone
2013365228127100004784140Ozone
2012366208138200004890129Ozone
2011365225130100004784143Ozone
201036525410731004674151Ozone
20093652917310004358101Ozone
200836624211860004577133Ozone
2007365216139100004780129Ozone
2006365207142160004787129Ozone
2005365236115131004577151Ozone
20043662689530004462105Ozone
2003365243109130004577147Ozone
200236522313570004577112Ozone
200136523712530004671105Ozone
2000366175167240005293140Ozone
19993653016220004360136Ozone
19983652986610004356108Ozone
19973653065720004254104NO2
199636627272220004464128NO2
199536525288250004671110NO2
199436525510730004762110NO2
199336526210120004563110NO2
1992366269970000456293NO2
1991365187166120005079136NO2
1990365210145100004872108NO2
1989365171181121005179165NO2
1988366202152111005071158NO2
198736525011410004671121Ozone
198636525810520004469112Ozone
19853632698950004469148Ozone
1984366157189200005387143NO2
1983365183162182005086198NO2
1982365210139104204879212CO
1981365225127130004777133NO2
1980366147197220005791150NO2

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 Colorado with a similar median AQI in 2025

All monitored counties in Colorado

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