EnviroNearby

Travis County, Texas air quality history

Daily Air Quality Index summaries from EPA monitors in Travis, Texas, 1980–2025.

44%
Good days in 2025
53
Median daily AQI, 2025
6
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 Travis, Texas on 365 days. 159 of those days (44%) were in the Good range, and the median daily AQI was 53. That median is higher than the typical monitored county in Texas (median 43.5 across 44 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 224 days. Across the years with fuller monitoring, the share of Good days fell: an average of 78% in 1980–1982 versus 42% 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 239 of 305 days1980: Moderate 47 of 305 days1980: Unhealthy for Sensitive Groups 15 of 305 days1980: Unhealthy 4 of 305 days19801981: Good 247 of 321 days1981: Moderate 53 of 321 days1981: Unhealthy for Sensitive Groups 12 of 321 days1981: Unhealthy 9 of 321 days1982: Good 277 of 346 days1982: Moderate 43 of 346 days1982: Unhealthy for Sensitive Groups 22 of 346 days1982: Unhealthy 4 of 346 days1983: Good 288 of 357 days1983: Moderate 55 of 357 days1983: Unhealthy for Sensitive Groups 12 of 357 days1983: Unhealthy 2 of 357 days1984: Good 278 of 352 days1984: Moderate 55 of 352 days1984: Unhealthy for Sensitive Groups 14 of 352 days1984: Unhealthy 5 of 352 days1985: Good 280 of 361 days1985: Moderate 55 of 361 days1985: Unhealthy for Sensitive Groups 20 of 361 days1985: Unhealthy 5 of 361 days1985: Very Unhealthy 1 of 361 days19851986: Good 285 of 359 days1986: Moderate 61 of 359 days1986: Unhealthy for Sensitive Groups 11 of 359 days1986: Unhealthy 2 of 359 days1987: Good 266 of 364 days1987: Moderate 72 of 364 days1987: Unhealthy for Sensitive Groups 23 of 364 days1987: Unhealthy 3 of 364 days1988: Good 266 of 365 days1988: Moderate 66 of 365 days1988: Unhealthy for Sensitive Groups 27 of 365 days1988: Unhealthy 6 of 365 days1989: Good 289 of 365 days1989: Moderate 53 of 365 days1989: Unhealthy for Sensitive Groups 20 of 365 days1989: Unhealthy 2 of 365 days1989: Very Unhealthy 1 of 365 days1990: Good 282 of 365 days1990: Moderate 63 of 365 days1990: Unhealthy for Sensitive Groups 16 of 365 days1990: Unhealthy 4 of 365 days19901991: Good 283 of 365 days1991: Moderate 66 of 365 days1991: Unhealthy for Sensitive Groups 13 of 365 days1991: Unhealthy 3 of 365 days1992: Good 289 of 365 days1992: Moderate 55 of 365 days1992: Unhealthy for Sensitive Groups 20 of 365 days1992: Unhealthy 1 of 365 days1993: Good 317 of 365 days1993: Moderate 37 of 365 days1993: Unhealthy for Sensitive Groups 9 of 365 days1993: Unhealthy 2 of 365 days1994: Good 268 of 365 days1994: Moderate 81 of 365 days1994: Unhealthy for Sensitive Groups 12 of 365 days1994: Unhealthy 4 of 365 days1995: Good 253 of 365 days1995: Moderate 64 of 365 days1995: Unhealthy for Sensitive Groups 38 of 365 days1995: Unhealthy 10 of 365 days19951996: Good 304 of 366 days1996: Moderate 54 of 366 days1996: Unhealthy for Sensitive Groups 8 of 366 days1997: Good 285 of 365 days1997: Moderate 50 of 365 days1997: Unhealthy for Sensitive Groups 25 of 365 days1997: Unhealthy 5 of 365 days1998: Good 280 of 365 days1998: Moderate 60 of 365 days1998: Unhealthy for Sensitive Groups 20 of 365 days1998: Unhealthy 5 of 365 days1999: Good 205 of 365 days1999: Moderate 112 of 365 days1999: Unhealthy for Sensitive Groups 30 of 365 days1999: Unhealthy 18 of 365 days2000: Good 110 of 366 days2000: Moderate 221 of 366 days2000: Unhealthy for Sensitive Groups 25 of 366 days2000: Unhealthy 10 of 366 days20002001: Good 141 of 365 days2001: Moderate 211 of 365 days2001: Unhealthy for Sensitive Groups 13 of 365 days2002: Good 136 of 365 days2002: Moderate 213 of 365 days2002: Unhealthy for Sensitive Groups 11 of 365 days2002: Unhealthy 5 of 365 days2003: Good 216 of 365 days2003: Moderate 129 of 365 days2003: Unhealthy for Sensitive Groups 17 of 365 days2003: Unhealthy 3 of 365 days2004: Good 296 of 366 days2004: Moderate 57 of 366 days2004: Unhealthy for Sensitive Groups 11 of 366 days2004: Unhealthy 2 of 366 days2005: Good 151 of 365 days2005: Moderate 197 of 365 days2005: Unhealthy for Sensitive Groups 14 of 365 days2005: Unhealthy 3 of 365 days20052006: Good 159 of 365 days2006: Moderate 170 of 365 days2006: Unhealthy for Sensitive Groups 32 of 365 days2006: Unhealthy 4 of 365 days2007: Good 183 of 365 days2007: Moderate 174 of 365 days2007: Unhealthy for Sensitive Groups 7 of 365 days2007: Unhealthy 1 of 365 days2008: Good 160 of 366 days2008: Moderate 192 of 366 days2008: Unhealthy for Sensitive Groups 14 of 366 days2009: Good 183 of 365 days2009: Moderate 177 of 365 days2009: Unhealthy for Sensitive Groups 5 of 365 days2010: Good 220 of 365 days2010: Moderate 137 of 365 days2010: Unhealthy for Sensitive Groups 8 of 365 days20102011: Good 167 of 365 days2011: Moderate 184 of 365 days2011: Unhealthy for Sensitive Groups 14 of 365 days2012: Good 178 of 366 days2012: Moderate 180 of 366 days2012: Unhealthy for Sensitive Groups 6 of 366 days2012: Unhealthy 2 of 366 days2013: Good 191 of 365 days2013: Moderate 170 of 365 days2013: Unhealthy for Sensitive Groups 4 of 365 days2014: Good 176 of 365 days2014: Moderate 189 of 365 days2015: Good 193 of 365 days2015: Moderate 162 of 365 days2015: Unhealthy for Sensitive Groups 10 of 365 days20152016: Good 219 of 366 days2016: Moderate 146 of 366 days2016: Unhealthy for Sensitive Groups 1 of 366 days2017: Good 185 of 365 days2017: Moderate 176 of 365 days2017: Unhealthy for Sensitive Groups 4 of 365 days2018: Good 168 of 365 days2018: Moderate 188 of 365 days2018: Unhealthy for Sensitive Groups 9 of 365 days2019: Good 169 of 365 days2019: Moderate 194 of 365 days2019: Unhealthy for Sensitive Groups 2 of 365 days2020: Good 182 of 366 days2020: Moderate 183 of 366 days2020: Unhealthy 1 of 366 days20202021: Good 182 of 365 days2021: Moderate 182 of 365 days2021: Unhealthy for Sensitive Groups 1 of 365 days2022: Good 178 of 365 days2022: Moderate 180 of 365 days2022: Unhealthy for Sensitive Groups 7 of 365 days2023: Good 147 of 365 days2023: Moderate 207 of 365 days2023: Unhealthy for Sensitive Groups 11 of 365 days2024: Good 156 of 366 days2024: Moderate 203 of 366 days2024: Unhealthy for Sensitive Groups 7 of 366 days2025: Good 159 of 365 days2025: Moderate 200 of 365 days2025: Unhealthy for Sensitive Groups 6 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 year0501001501980: 90th percentile AQI 841981: 90th percentile AQI 771982: 90th percentile AQI 841983: 90th percentile AQI 711984: 90th percentile AQI 741985: 90th percentile AQI 931986: 90th percentile AQI 711987: 90th percentile AQI 871988: 90th percentile AQI 901989: 90th percentile AQI 791990: 90th percentile AQI 771991: 90th percentile AQI 771992: 90th percentile AQI 801993: 90th percentile AQI 611994: 90th percentile AQI 771995: 90th percentile AQI 1081996: 90th percentile AQI 601997: 90th percentile AQI 971998: 90th percentile AQI 871999: 90th percentile AQI 1122000: 90th percentile AQI 1002001: 90th percentile AQI 782002: 90th percentile AQI 802003: 90th percentile AQI 842004: 90th percentile AQI 772005: 90th percentile AQI 902006: 90th percentile AQI 1002007: 90th percentile AQI 722008: 90th percentile AQI 772009: 90th percentile AQI 742010: 90th percentile AQI 682011: 90th percentile AQI 842012: 90th percentile AQI 772013: 90th percentile AQI 732014: 90th percentile AQI 692015: 90th percentile AQI 742016: 90th percentile AQI 632017: 90th percentile AQI 662018: 90th percentile AQI 692019: 90th percentile AQI 672020: 90th percentile AQI 662021: 90th percentile AQI 672022: 90th percentile AQI 772023: 90th percentile AQI 792024: 90th percentile AQI 802025: 90th percentile AQI 711980: Median AQI 381981: Median AQI 351982: Median AQI 371983: Median AQI 381984: Median AQI 351985: Median AQI 381986: Median AQI 351987: Median AQI 401988: Median AQI 421989: Median AQI 381990: Median AQI 381991: Median AQI 381992: Median AQI 381993: Median AQI 371994: Median AQI 411995: Median AQI 421996: Median AQI 371997: Median AQI 351998: Median AQI 371999: Median AQI 472000: Median AQI 572001: Median AQI 542002: Median AQI 542003: Median AQI 462004: Median AQI 342005: Median AQI 532006: Median AQI 532007: Median AQI 502008: Median AQI 522009: Median AQI 502010: Median AQI 462011: Median AQI 522012: Median AQI 512013: Median AQI 492014: Median AQI 512015: Median AQI 492016: Median AQI 472017: Median AQI 502018: Median AQI 522019: Median AQI 522020: Median AQI 512021: Median AQI 512022: Median AQI 512023: Median AQI 542024: Median AQI 522025: Median AQI 531980198519901995200020052010201520202025
  • 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)22461%
Ozone13637%
Coarse particles (PM10)41%
Nitrogen dioxide (NO₂)1<1%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536515920060005371129PM2.5
202436615620370005280141PM2.5
2023365147207110005479122PM2.5
202236517818070005177129PM2.5
202136518218210005167101PM2.5
202036618218301005166154PM2.5
201936516919420005267115PM2.5
201836516818890005269115PM2.5
201736518517640005066130PM2.5
201636621914610004763105PM2.5
2015365193162100004974150PM2.5
20143651761890000516997PM2.5
201336519117040004973129PM2.5
201236617818062005177172PM2.5
2011365167184140005284140PM2.5
201036522013780004668122PM2.5
200936518317750005074133PM2.5
2008366160192140005277126PM2.5
200736518317471005072169PM2.5
20063651591703240053100164PM2.5
2005365151197143005390156PM2.5
200436629657112003477166Ozone
2003365216129173004684177Ozone
2002365136213115005480187PM2.5
2001365141211130005478150PM2.5
200036611022125100057100187PM2.5
199936520511230180047112195Ozone
199836528060205003787174Ozone
199736528550255003597179Ozone
19963663045480003760147Ozone
19953652536438100042108179Ozone
199436526881124004177159Ozone
19933653173792003761154Ozone
199236528955201003880161Ozone
199136528366133003877166Ozone
199036528263164003877200Ozone
198936528953202103879201Ozone
198836526666276004290190Ozone
198736426672233004087179Ozone
198635928561112003571161Ozone
198536128055205103893210Ozone
198435227855145003574192Ozone
198335728855122003871166Ozone
198234627743224003784192Ozone
198132124753129003577195Ozone
198030523947154003884174Ozone

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 Texas with a similar median AQI in 2025

All monitored counties in Texas

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