EnviroNearby

Orange County, Texas air quality history

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

60%
Good days in 2025
45
Median daily AQI, 2025
0
Days above 100 in 2025
364
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Orange, Texas on 364 days. 219 of those days (60%) were in the Good range, and the median daily AQI was 45. That median is about the same as 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 241 days. Across the years with fuller monitoring, the share of Good days fell: an average of 71% in 1980–1982 versus 61% in 2023–2025.

Years with fewer than 120 monitored days (1985) 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%1980: Good 158 of 263 days1980: Moderate 50 of 263 days1980: Unhealthy for Sensitive Groups 20 of 263 days1980: Unhealthy 20 of 263 days1980: Very Unhealthy 15 of 263 days19801981: Good 216 of 281 days1981: Moderate 45 of 281 days1981: Unhealthy for Sensitive Groups 10 of 281 days1981: Unhealthy 10 of 281 days1982: Good 211 of 281 days1982: Moderate 55 of 281 days1982: Unhealthy for Sensitive Groups 11 of 281 days1982: Unhealthy 3 of 281 days1982: Very Unhealthy 1 of 281 days1983: Good 275 of 332 days1983: Moderate 35 of 332 days1983: Unhealthy for Sensitive Groups 17 of 332 days1983: Unhealthy 5 of 332 days1984: Good 261 of 332 days1984: Moderate 48 of 332 days1984: Unhealthy for Sensitive Groups 17 of 332 days1984: Unhealthy 5 of 332 days1984: Very Unhealthy 1 of 332 days1985: Good 108 of 108 days19851986: Good 253 of 310 days1986: Moderate 35 of 310 days1986: Unhealthy for Sensitive Groups 14 of 310 days1986: Unhealthy 8 of 310 days1989: Good 111 of 140 days1989: Moderate 17 of 140 days1989: Unhealthy for Sensitive Groups 9 of 140 days1989: Unhealthy 3 of 140 days1990: Good 241 of 326 days1990: Moderate 47 of 326 days1990: Unhealthy for Sensitive Groups 28 of 326 days1990: Unhealthy 10 of 326 days1991: Good 256 of 308 days1991: Moderate 30 of 308 days1991: Unhealthy for Sensitive Groups 14 of 308 days1991: Unhealthy 6 of 308 days1991: Very Unhealthy 2 of 308 days1992: Good 271 of 343 days1992: Moderate 54 of 343 days1992: Unhealthy for Sensitive Groups 12 of 343 days1992: Unhealthy 6 of 343 days19921993: Good 308 of 357 days1993: Moderate 34 of 357 days1993: Unhealthy for Sensitive Groups 12 of 357 days1993: Unhealthy 2 of 357 days1993: Very Unhealthy 1 of 357 days1994: Good 302 of 350 days1994: Moderate 38 of 350 days1994: Unhealthy for Sensitive Groups 8 of 350 days1994: Unhealthy 2 of 350 days1995: Good 264 of 357 days1995: Moderate 51 of 357 days1995: Unhealthy for Sensitive Groups 36 of 357 days1995: Unhealthy 6 of 357 days1996: Good 300 of 353 days1996: Moderate 42 of 353 days1996: Unhealthy for Sensitive Groups 9 of 353 days1996: Unhealthy 2 of 353 days1997: Good 262 of 336 days1997: Moderate 51 of 336 days1997: Unhealthy for Sensitive Groups 18 of 336 days1997: Unhealthy 3 of 336 days1997: Very Unhealthy 2 of 336 days19971998: Good 312 of 363 days1998: Moderate 44 of 363 days1998: Unhealthy for Sensitive Groups 6 of 363 days1998: Unhealthy 1 of 363 days1999: Good 338 of 365 days1999: Moderate 27 of 365 days2000: Good 262 of 366 days2000: Moderate 71 of 366 days2000: Unhealthy for Sensitive Groups 28 of 366 days2000: Unhealthy 5 of 366 days2001: Good 243 of 365 days2001: Moderate 114 of 365 days2001: Unhealthy for Sensitive Groups 7 of 365 days2001: Unhealthy 1 of 365 days2002: Good 233 of 365 days2002: Moderate 109 of 365 days2002: Unhealthy for Sensitive Groups 20 of 365 days2002: Unhealthy 3 of 365 days20022003: Good 211 of 365 days2003: Moderate 131 of 365 days2003: Unhealthy for Sensitive Groups 18 of 365 days2003: Unhealthy 5 of 365 days2004: Good 228 of 366 days2004: Moderate 127 of 366 days2004: Unhealthy for Sensitive Groups 10 of 366 days2004: Unhealthy 1 of 366 days2005: Good 105 of 346 days2005: Moderate 223 of 346 days2005: Unhealthy for Sensitive Groups 18 of 346 days2006: Good 117 of 365 days2006: Moderate 235 of 365 days2006: Unhealthy for Sensitive Groups 12 of 365 days2006: Unhealthy 1 of 365 days2007: Good 136 of 364 days2007: Moderate 217 of 364 days2007: Unhealthy for Sensitive Groups 11 of 364 days20072008: Good 180 of 364 days2008: Moderate 180 of 364 days2008: Unhealthy for Sensitive Groups 4 of 364 days2009: Good 268 of 365 days2009: Moderate 91 of 365 days2009: Unhealthy for Sensitive Groups 4 of 365 days2009: Unhealthy 2 of 365 days2010: Good 162 of 365 days2010: Moderate 189 of 365 days2010: Unhealthy for Sensitive Groups 14 of 365 days2011: Good 208 of 365 days2011: Moderate 147 of 365 days2011: Unhealthy for Sensitive Groups 9 of 365 days2011: Unhealthy 1 of 365 days2012: Good 221 of 366 days2012: Moderate 140 of 366 days2012: Unhealthy for Sensitive Groups 5 of 366 days20122013: Good 233 of 365 days2013: Moderate 131 of 365 days2013: Unhealthy for Sensitive Groups 1 of 365 days2014: Good 232 of 365 days2014: Moderate 130 of 365 days2014: Unhealthy for Sensitive Groups 3 of 365 days2015: Good 252 of 365 days2015: Moderate 113 of 365 days2016: Good 283 of 366 days2016: Moderate 83 of 366 days2017: Good 221 of 355 days2017: Moderate 133 of 355 days2017: Unhealthy for Sensitive Groups 1 of 355 days20172018: Good 173 of 365 days2018: Moderate 186 of 365 days2018: Unhealthy for Sensitive Groups 6 of 365 days2019: Good 233 of 365 days2019: Moderate 132 of 365 days2020: Good 223 of 362 days2020: Moderate 137 of 362 days2020: Unhealthy for Sensitive Groups 2 of 362 days2021: Good 262 of 364 days2021: Moderate 102 of 364 days2022: Good 247 of 365 days2022: Moderate 116 of 365 days2022: Unhealthy for Sensitive Groups 2 of 365 days20222023: Good 213 of 365 days2023: Moderate 151 of 365 days2023: Unhealthy for Sensitive Groups 1 of 365 days2024: Good 238 of 366 days2024: Moderate 125 of 366 days2024: Unhealthy for Sensitive Groups 3 of 366 days2025: Good 219 of 364 days2025: Moderate 145 of 364 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 year0501001502001980: 90th percentile AQI 1791981: 90th percentile AQI 871982: 90th percentile AQI 841983: 90th percentile AQI 711984: 90th percentile AQI 901985: 90th percentile AQI 191986: 90th percentile AQI 901989: 90th percentile AQI 931990: 90th percentile AQI 1081991: 90th percentile AQI 771992: 90th percentile AQI 771993: 90th percentile AQI 711994: 90th percentile AQI 611995: 90th percentile AQI 1081996: 90th percentile AQI 641997: 90th percentile AQI 901998: 90th percentile AQI 541999: 90th percentile AQI 472000: 90th percentile AQI 972001: 90th percentile AQI 742002: 90th percentile AQI 802003: 90th percentile AQI 842004: 90th percentile AQI 742005: 90th percentile AQI 872006: 90th percentile AQI 792007: 90th percentile AQI 742008: 90th percentile AQI 672009: 90th percentile AQI 582010: 90th percentile AQI 742011: 90th percentile AQI 742012: 90th percentile AQI 642013: 90th percentile AQI 642014: 90th percentile AQI 612015: 90th percentile AQI 612016: 90th percentile AQI 552017: 90th percentile AQI 612018: 90th percentile AQI 692019: 90th percentile AQI 602020: 90th percentile AQI 622021: 90th percentile AQI 572022: 90th percentile AQI 602023: 90th percentile AQI 632024: 90th percentile AQI 582025: 90th percentile AQI 591980: Median AQI 441981: Median AQI 381982: Median AQI 381983: Median AQI 281984: Median AQI 371985: Median AQI 91986: Median AQI 301989: Median AQI 371990: Median AQI 371991: Median AQI 341992: Median AQI 381993: Median AQI 351994: Median AQI 331995: Median AQI 381996: Median AQI 341997: Median AQI 361998: Median AQI 311999: Median AQI 312000: Median AQI 382001: Median AQI 422002: Median AQI 432003: Median AQI 462004: Median AQI 422005: Median AQI 562006: Median AQI 562007: Median AQI 532008: Median AQI 512009: Median AQI 412010: Median AQI 522011: Median AQI 472012: Median AQI 462013: Median AQI 462014: Median AQI 432015: Median AQI 422016: Median AQI 392017: Median AQI 432018: Median AQI 522019: Median AQI 442020: Median AQI 442021: Median AQI 412022: Median AQI 432023: Median AQI 462024: Median AQI 442025: Median AQI 451980198519921997200220072012201720222025
  • 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)24166%
Ozone12334%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253642191450000455990PM2.5
202436623812530004458119PM2.5
202336521315110004663101PM2.5
202236524711620004360108PM2.5
20213642621020000415780PM2.5
202036222313720004462103PM2.5
201936523313200004460100PM2.5
201836517318660005269122PM2.5
201735522113310004361105PM2.5
2016366283830000395587PM2.5
201536525211300004261100PM2.5
201436523213030004361129PM2.5
201336523313110004664129PM2.5
201236622114050004664147PM2.5
201136520814791004774154PM2.5
2010365162189140005274136PM2.5
20093652689142004158161Ozone
200836418018040005167143PM2.5
2007364136217110005374150PM2.5
2006365117235121005679154PM2.5
2005346105223180005687150PM2.5
2004366228127101004274154Ozone
2003365211131185004684185Ozone
2002365233109203004380172Ozone
200136524311471004274164Ozone
200036626271285003897172Ozone
1999365338270000314790Ozone
19983633124461003154169Ozone
199733626251183203690218Ozone
19963533004292003464164Ozone
1995357264513660038108177Ozone
19943503023882003361172Ozone
199335730834122103571204Ozone
199234327154126003877200Ozone
199130825630146203477213Ozone
19903262414728100037108187Ozone
19891401111793003793161Ozone
198631025335148003090190Ozone
19851081080000091928NO2
198433226148175103790206Ozone
198333227535175002871161Ozone
198228121155113103884217Ozone
1981281216451010003887200Ozone
198026315850202015044179224Ozone

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