EnviroNearby

Orange County, Florida air quality history

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

73%
Good days in 2025
43
Median daily AQI, 2025
1
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 Orange, Florida on 365 days. 266 of those days (73%) were in the Good range, and the median daily AQI was 43. That median is about the same as the typical monitored county in Florida (median 41 across 38 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 188 days. Across the years with fuller monitoring, the share of Good days rose: an average of 66% in 1980–1982 versus 74% 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 273 of 359 days1980: Moderate 76 of 359 days1980: Unhealthy for Sensitive Groups 10 of 359 days19801981: Good 179 of 358 days1981: Moderate 154 of 358 days1981: Unhealthy for Sensitive Groups 24 of 358 days1981: Unhealthy 1 of 358 days1982: Good 261 of 365 days1982: Moderate 95 of 365 days1982: Unhealthy for Sensitive Groups 9 of 365 days1983: Good 286 of 365 days1983: Moderate 74 of 365 days1983: Unhealthy for Sensitive Groups 3 of 365 days1983: Unhealthy 1 of 365 days1983: Very Unhealthy 1 of 365 days1984: Good 281 of 366 days1984: Moderate 72 of 366 days1984: Unhealthy for Sensitive Groups 13 of 366 days1985: Good 338 of 365 days1985: Moderate 25 of 365 days1985: Unhealthy for Sensitive Groups 2 of 365 days19851986: Good 311 of 365 days1986: Moderate 38 of 365 days1986: Unhealthy for Sensitive Groups 13 of 365 days1986: Unhealthy 3 of 365 days1987: Good 301 of 365 days1987: Moderate 51 of 365 days1987: Unhealthy for Sensitive Groups 11 of 365 days1987: Unhealthy 2 of 365 days1988: Good 287 of 366 days1988: Moderate 66 of 366 days1988: Unhealthy for Sensitive Groups 12 of 366 days1988: Unhealthy 1 of 366 days1989: Good 273 of 365 days1989: Moderate 72 of 365 days1989: Unhealthy for Sensitive Groups 15 of 365 days1989: Unhealthy 5 of 365 days1990: Good 286 of 365 days1990: Moderate 57 of 365 days1990: Unhealthy for Sensitive Groups 19 of 365 days1990: Unhealthy 3 of 365 days19901991: Good 314 of 365 days1991: Moderate 45 of 365 days1991: Unhealthy for Sensitive Groups 5 of 365 days1991: Unhealthy 1 of 365 days1992: Good 281 of 366 days1992: Moderate 66 of 366 days1992: Unhealthy for Sensitive Groups 15 of 366 days1992: Unhealthy 4 of 366 days1993: Good 291 of 365 days1993: Moderate 56 of 365 days1993: Unhealthy for Sensitive Groups 18 of 365 days1994: Good 306 of 365 days1994: Moderate 48 of 365 days1994: Unhealthy for Sensitive Groups 8 of 365 days1994: Unhealthy 3 of 365 days1995: Good 278 of 365 days1995: Moderate 68 of 365 days1995: Unhealthy for Sensitive Groups 19 of 365 days19951996: Good 298 of 366 days1996: Moderate 60 of 366 days1996: Unhealthy for Sensitive Groups 7 of 366 days1996: Unhealthy 1 of 366 days1997: Good 289 of 365 days1997: Moderate 60 of 365 days1997: Unhealthy for Sensitive Groups 13 of 365 days1997: Unhealthy 3 of 365 days1998: Good 269 of 365 days1998: Moderate 64 of 365 days1998: Unhealthy for Sensitive Groups 22 of 365 days1998: Unhealthy 9 of 365 days1998: Very Unhealthy 1 of 365 days1999: Good 120 of 364 days1999: Moderate 218 of 364 days1999: Unhealthy for Sensitive Groups 24 of 364 days1999: Unhealthy 2 of 364 days2000: Good 107 of 366 days2000: Moderate 237 of 366 days2000: Unhealthy for Sensitive Groups 18 of 366 days2000: Unhealthy 4 of 366 days20002001: Good 109 of 365 days2001: Moderate 239 of 365 days2001: Unhealthy for Sensitive Groups 16 of 365 days2001: Unhealthy 1 of 365 days2002: Good 141 of 365 days2002: Moderate 218 of 365 days2002: Unhealthy for Sensitive Groups 5 of 365 days2002: Unhealthy 1 of 365 days2003: Good 131 of 365 days2003: Moderate 226 of 365 days2003: Unhealthy for Sensitive Groups 8 of 365 days2004: Good 111 of 366 days2004: Moderate 246 of 366 days2004: Unhealthy for Sensitive Groups 9 of 366 days2005: Good 128 of 365 days2005: Moderate 223 of 365 days2005: Unhealthy for Sensitive Groups 10 of 365 days2005: Unhealthy 4 of 365 days20052006: Good 113 of 365 days2006: Moderate 235 of 365 days2006: Unhealthy for Sensitive Groups 16 of 365 days2006: Unhealthy 1 of 365 days2007: Good 150 of 365 days2007: Moderate 202 of 365 days2007: Unhealthy for Sensitive Groups 11 of 365 days2007: Unhealthy 2 of 365 days2008: Good 166 of 366 days2008: Moderate 196 of 366 days2008: Unhealthy for Sensitive Groups 4 of 366 days2009: Good 176 of 365 days2009: Moderate 186 of 365 days2009: Unhealthy for Sensitive Groups 3 of 365 days2010: Good 172 of 365 days2010: Moderate 188 of 365 days2010: Unhealthy for Sensitive Groups 5 of 365 days20102011: Good 172 of 365 days2011: Moderate 183 of 365 days2011: Unhealthy for Sensitive Groups 10 of 365 days2012: Good 232 of 366 days2012: Moderate 128 of 366 days2012: Unhealthy for Sensitive Groups 6 of 366 days2013: Good 254 of 365 days2013: Moderate 110 of 365 days2013: Unhealthy for Sensitive Groups 1 of 365 days2014: Good 236 of 362 days2014: Moderate 125 of 362 days2014: Unhealthy for Sensitive Groups 1 of 362 days2015: Good 239 of 365 days2015: Moderate 125 of 365 days2015: Unhealthy for Sensitive Groups 1 of 365 days20152016: Good 214 of 366 days2016: Moderate 152 of 366 days2017: Good 195 of 365 days2017: Moderate 168 of 365 days2017: Unhealthy for Sensitive Groups 2 of 365 days2018: Good 286 of 365 days2018: Moderate 77 of 365 days2018: Unhealthy for Sensitive Groups 1 of 365 days2018: Unhealthy 1 of 365 days2019: Good 293 of 360 days2019: Moderate 67 of 360 days2020: Good 354 of 366 days2020: Moderate 12 of 366 days20202021: Good 354 of 365 days2021: Moderate 11 of 365 days2022: Good 317 of 365 days2022: Moderate 48 of 365 days2023: Good 267 of 365 days2023: Moderate 96 of 365 days2023: Unhealthy for Sensitive Groups 2 of 365 days2024: Good 272 of 360 days2024: Moderate 86 of 360 days2024: Unhealthy for Sensitive Groups 2 of 360 days2025: Good 266 of 365 days2025: Moderate 98 of 365 days2025: Unhealthy for Sensitive Groups 1 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 671981: 90th percentile AQI 931982: 90th percentile AQI 721983: 90th percentile AQI 671984: 90th percentile AQI 741985: 90th percentile AQI 481986: 90th percentile AQI 641987: 90th percentile AQI 741988: 90th percentile AQI 771989: 90th percentile AQI 801990: 90th percentile AQI 771991: 90th percentile AQI 581992: 90th percentile AQI 801993: 90th percentile AQI 741994: 90th percentile AQI 671995: 90th percentile AQI 841996: 90th percentile AQI 641997: 90th percentile AQI 741998: 90th percentile AQI 931999: 90th percentile AQI 842000: 90th percentile AQI 912001: 90th percentile AQI 762002: 90th percentile AQI 712003: 90th percentile AQI 692004: 90th percentile AQI 742005: 90th percentile AQI 772006: 90th percentile AQI 892007: 90th percentile AQI 742008: 90th percentile AQI 672009: 90th percentile AQI 642010: 90th percentile AQI 642011: 90th percentile AQI 672012: 90th percentile AQI 612013: 90th percentile AQI 582014: 90th percentile AQI 602015: 90th percentile AQI 592016: 90th percentile AQI 592017: 90th percentile AQI 642018: 90th percentile AQI 552019: 90th percentile AQI 552020: 90th percentile AQI 452021: 90th percentile AQI 452022: 90th percentile AQI 522023: 90th percentile AQI 622024: 90th percentile AQI 582025: 90th percentile AQI 581980: Median AQI 401981: Median AQI 511982: Median AQI 431983: Median AQI 381984: Median AQI 371985: Median AQI 311986: Median AQI 351987: Median AQI 381988: Median AQI 391989: Median AQI 391990: Median AQI 421991: Median AQI 371992: Median AQI 381993: Median AQI 391994: Median AQI 351995: Median AQI 391996: Median AQI 381997: Median AQI 391998: Median AQI 401999: Median AQI 552000: Median AQI 562001: Median AQI 562002: Median AQI 542003: Median AQI 532004: Median AQI 552005: Median AQI 542006: Median AQI 552007: Median AQI 522008: Median AQI 522009: Median AQI 512010: Median AQI 512011: Median AQI 512012: Median AQI 472013: Median AQI 442014: Median AQI 452015: Median AQI 442016: Median AQI 472017: Median AQI 492018: Median AQI 402019: Median AQI 392020: Median AQI 342021: Median AQI 332022: Median AQI 392023: Median AQI 432024: Median AQI 412025: Median AQI 431980198519901995200020052010201520202025
  • 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
Ozone18852%
Fine particles (PM2.5)17147%
Nitrogen dioxide (NO₂)62%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652669810004358105Ozone
20243602728620004158121Ozone
20233652679620004362115Ozone
2022365317480000395297Ozone
2021365354110000334587Ozone
2020366354120000344593Ozone
2019360293670000395593Ozone
20183652867711004055151Ozone
201736519516820004964147PM2.5
20163662141520000475997PM2.5
201536523912510004459101PM2.5
201436223612510004560126PM2.5
201336525411010004458108PM2.5
201236623212860004761140PM2.5
2011365172183100005167133PM2.5
201036517218850005164133PM2.5
200936517618630005164115PM2.5
200836616619640005267147PM2.5
2007365150202112005274168PM2.5
2006365113235161005589156PM2.5
2005365128223104005477182PM2.5
200436611124690005574143PM2.5
200336513122680005369147PM2.5
200236514121851005471159PM2.5
2001365109239161005676155PM2.5
2000366107237184005691174PM2.5
1999364120218242005584177PM2.5
199836526964229104093203Ozone
199736528960133003974190Ozone
19963662986071003864159Ozone
199536527868190003984133Ozone
19943653064883003567161Ozone
199336529156180003974150Ozone
199236628166154003880200Ozone
19913653144551003758159Ozone
199036528657193004277177Ozone
198936527372155003980200Ozone
198836628766121003977151Ozone
198736530151112003874185Ozone
198636531138133003564164Ozone
19853653382520003148143Ozone
198436628172130003774147Ozone
19833652867431103867201Ozone
19823652619590004372129CO
1981358179154241005193172Ozone
198035927376100004067140Ozone

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 Florida with a similar median AQI in 2025

All monitored counties in Florida

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