EnviroNearby

Taylor County, Wisconsin air quality history

Daily Air Quality Index summaries from EPA monitors in Taylor, Wisconsin, 1980–2025.

95%
Good days in 2025
34
Median daily AQI, 2025
0
Days above 100 in 2025
363
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Taylor, Wisconsin on 363 days. 346 of those days (95%) were in the Good range, and the median daily AQI was 34. That median is lower than the typical monitored county in Wisconsin (median 38 across 29 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 363 days. Across the years with fuller monitoring, the share of Good days rose: an average of 82% in 1980–1982 versus 86% 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 190 of 266 days1980: Moderate 48 of 266 days1980: Unhealthy for Sensitive Groups 18 of 266 days1980: Unhealthy 10 of 266 days19801981: Good 298 of 337 days1981: Moderate 35 of 337 days1981: Unhealthy for Sensitive Groups 4 of 337 days1982: Good 221 of 254 days1982: Moderate 31 of 254 days1982: Unhealthy for Sensitive Groups 2 of 254 days1990: Good 330 of 356 days1990: Moderate 26 of 356 days1991: Good 319 of 359 days1991: Moderate 37 of 359 days1991: Unhealthy for Sensitive Groups 3 of 359 days1992: Good 311 of 347 days1992: Moderate 29 of 347 days1992: Unhealthy for Sensitive Groups 7 of 347 days19921993: Good 334 of 357 days1993: Moderate 19 of 357 days1993: Unhealthy for Sensitive Groups 4 of 357 days1994: Good 322 of 356 days1994: Moderate 31 of 356 days1994: Unhealthy for Sensitive Groups 3 of 356 days1995: Good 314 of 359 days1995: Moderate 32 of 359 days1995: Unhealthy for Sensitive Groups 13 of 359 days1996: Good 329 of 359 days1996: Moderate 30 of 359 days1997: Good 326 of 363 days1997: Moderate 36 of 363 days1997: Unhealthy for Sensitive Groups 1 of 363 days19971998: Good 309 of 358 days1998: Moderate 44 of 358 days1998: Unhealthy for Sensitive Groups 5 of 358 days1999: Good 305 of 362 days1999: Moderate 46 of 362 days1999: Unhealthy for Sensitive Groups 8 of 362 days1999: Unhealthy 3 of 362 days2000: Good 329 of 364 days2000: Moderate 31 of 364 days2000: Unhealthy for Sensitive Groups 4 of 364 days2001: Good 283 of 331 days2001: Moderate 42 of 331 days2001: Unhealthy for Sensitive Groups 4 of 331 days2001: Unhealthy 2 of 331 days2002: Good 280 of 339 days2002: Moderate 57 of 339 days2002: Unhealthy for Sensitive Groups 2 of 339 days20022003: Good 221 of 284 days2003: Moderate 62 of 284 days2003: Unhealthy for Sensitive Groups 1 of 284 days2004: Good 246 of 292 days2004: Moderate 46 of 292 days2005: Good 226 of 292 days2005: Moderate 66 of 292 days2006: Good 275 of 357 days2006: Moderate 80 of 357 days2006: Unhealthy for Sensitive Groups 2 of 357 days2007: Good 268 of 335 days2007: Moderate 62 of 335 days2007: Unhealthy for Sensitive Groups 5 of 335 days20072008: Good 291 of 364 days2008: Moderate 71 of 364 days2008: Unhealthy for Sensitive Groups 2 of 364 days2009: Good 305 of 359 days2009: Moderate 54 of 359 days2010: Good 306 of 345 days2010: Moderate 38 of 345 days2010: Unhealthy for Sensitive Groups 1 of 345 days2011: Good 304 of 340 days2011: Moderate 36 of 340 days2012: Good 276 of 365 days2012: Moderate 87 of 365 days2012: Unhealthy for Sensitive Groups 2 of 365 days20122013: Good 260 of 365 days2013: Moderate 105 of 365 days2014: Good 285 of 365 days2014: Moderate 80 of 365 days2015: Good 316 of 365 days2015: Moderate 48 of 365 days2015: Unhealthy for Sensitive Groups 1 of 365 days2016: Good 321 of 360 days2016: Moderate 39 of 360 days2017: Good 314 of 363 days2017: Moderate 49 of 363 days20172018: Good 274 of 365 days2018: Moderate 91 of 365 days2019: Good 294 of 365 days2019: Moderate 71 of 365 days2020: Good 299 of 366 days2020: Moderate 67 of 366 days2021: Good 260 of 364 days2021: Moderate 100 of 364 days2021: Unhealthy for Sensitive Groups 2 of 364 days2021: Unhealthy 2 of 364 days2022: Good 310 of 365 days2022: Moderate 55 of 365 days20222023: Good 239 of 365 days2023: Moderate 114 of 365 days2023: Unhealthy for Sensitive Groups 7 of 365 days2023: Unhealthy 5 of 365 days2024: Good 357 of 366 days2024: Moderate 9 of 366 days2025: Good 346 of 363 days2025: Moderate 17 of 363 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 1011981: 90th percentile AQI 541982: 90th percentile AQI 611990: 90th percentile AQI 481991: 90th percentile AQI 511992: 90th percentile AQI 511993: 90th percentile AQI 461994: 90th percentile AQI 501995: 90th percentile AQI 641996: 90th percentile AQI 491997: 90th percentile AQI 511998: 90th percentile AQI 611999: 90th percentile AQI 612000: 90th percentile AQI 502001: 90th percentile AQI 582002: 90th percentile AQI 582003: 90th percentile AQI 612004: 90th percentile AQI 582005: 90th percentile AQI 612006: 90th percentile AQI 632007: 90th percentile AQI 592008: 90th percentile AQI 612009: 90th percentile AQI 542010: 90th percentile AQI 522011: 90th percentile AQI 512012: 90th percentile AQI 642013: 90th percentile AQI 612014: 90th percentile AQI 572015: 90th percentile AQI 542016: 90th percentile AQI 522017: 90th percentile AQI 532018: 90th percentile AQI 612019: 90th percentile AQI 572020: 90th percentile AQI 542021: 90th percentile AQI 632022: 90th percentile AQI 542023: 90th percentile AQI 702024: 90th percentile AQI 442025: 90th percentile AQI 461980: Median AQI 411981: Median AQI 351982: Median AQI 381990: Median AQI 331991: Median AQI 331992: Median AQI 321993: Median AQI 331994: Median AQI 341995: Median AQI 341996: Median AQI 361997: Median AQI 341998: Median AQI 361999: Median AQI 372000: Median AQI 352001: Median AQI 352002: Median AQI 362003: Median AQI 392004: Median AQI 352005: Median AQI 372006: Median AQI 402007: Median AQI 362008: Median AQI 382009: Median AQI 342010: Median AQI 362011: Median AQI 362012: Median AQI 402013: Median AQI 412014: Median AQI 382015: Median AQI 362016: Median AQI 352017: Median AQI 362018: Median AQI 422019: Median AQI 382020: Median AQI 382021: Median AQI 392022: Median AQI 372023: Median AQI 432024: Median AQI 342025: Median AQI 34198019921997200220072012201720222025
  • 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
Ozone363100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025363346170000344697Ozone
202436635790000344480Ozone
202336523911475004370169Ozone
2022365310550000375478Ozone
202136426010022003963153Ozone
2020366299670000385480Ozone
2019365294710000385787Ozone
2018365274910000426193Ozone
2017363314490000365377Ozone
2016360321390000355284Ozone
20153653164810003654120Ozone
2014365285800000385793Ozone
20133652601050000416180Ozone
20123652768720004064115Ozone
2011340304360000365187Ozone
20103453063810003652103Ozone
2009359305540000345494Ozone
20083642917120003861119Ozone
20073352686250003659136Ozone
20063572758020004063126Ozone
2005292226660000376196Ozone
2004292246460000355887Ozone
20032842216210003961122Ozone
20023392805720003658126Ozone
20013312834242003558164Ozone
20003643293140003550133Ozone
19993623054683003761177Ozone
19983583094450003661133Ozone
19973633263610003451112Ozone
1996359329300000364997Ozone
199535931432130003464143Ozone
19943563223130003450129Ozone
19933573341940003346122Ozone
19923473112970003251136Ozone
19913593193730003351115Ozone
1990356330260000334897Ozone
19822542213120003861133Ozone
19813372983540003554115Ozone
19802661904818100041101200Ozone

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 Wisconsin with a similar median AQI in 2025

All monitored counties in Wisconsin

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