EnviroNearby

Tucker County, West Virginia air quality history

Daily Air Quality Index summaries from EPA monitors in Tucker, West Virginia, 1990–2025.

94%
Good days in 2025
36
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 Tucker, West Virginia on 363 days. 342 of those days (94%) were in the Good range, and the median daily AQI was 36. That median is lower than the typical monitored county in West Virginia (median 39 across 12 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 350 days. Across the years with fuller monitoring, the share of Good days rose: an average of 71% in 1990–1992 versus 94% 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%1990: Good 277 of 361 days1990: Moderate 63 of 361 days1990: Unhealthy for Sensitive Groups 18 of 361 days1990: Unhealthy 3 of 361 days19901991: Good 240 of 361 days1991: Moderate 95 of 361 days1991: Unhealthy for Sensitive Groups 26 of 361 days1992: Good 251 of 354 days1992: Moderate 97 of 354 days1992: Unhealthy for Sensitive Groups 6 of 354 days1993: Good 224 of 359 days1993: Moderate 112 of 359 days1993: Unhealthy for Sensitive Groups 19 of 359 days1993: Unhealthy 4 of 359 days1994: Good 240 of 360 days1994: Moderate 96 of 360 days1994: Unhealthy for Sensitive Groups 20 of 360 days1994: Unhealthy 4 of 360 days1995: Good 240 of 362 days1995: Moderate 99 of 362 days1995: Unhealthy for Sensitive Groups 20 of 362 days1995: Unhealthy 3 of 362 days19951996: Good 247 of 362 days1996: Moderate 98 of 362 days1996: Unhealthy for Sensitive Groups 15 of 362 days1996: Unhealthy 2 of 362 days1997: Good 246 of 362 days1997: Moderate 102 of 362 days1997: Unhealthy for Sensitive Groups 13 of 362 days1997: Unhealthy 1 of 362 days1998: Good 207 of 360 days1998: Moderate 124 of 360 days1998: Unhealthy for Sensitive Groups 26 of 360 days1998: Unhealthy 3 of 360 days1999: Good 220 of 363 days1999: Moderate 114 of 363 days1999: Unhealthy for Sensitive Groups 27 of 363 days1999: Unhealthy 2 of 363 days2000: Good 249 of 364 days2000: Moderate 103 of 364 days2000: Unhealthy for Sensitive Groups 9 of 364 days2000: Unhealthy 3 of 364 days20002001: Good 264 of 365 days2001: Moderate 87 of 365 days2001: Unhealthy for Sensitive Groups 14 of 365 days2002: Good 264 of 363 days2002: Moderate 85 of 363 days2002: Unhealthy for Sensitive Groups 14 of 363 days2003: Good 279 of 362 days2003: Moderate 76 of 362 days2003: Unhealthy for Sensitive Groups 6 of 362 days2003: Unhealthy 1 of 362 days2004: Good 290 of 363 days2004: Moderate 72 of 363 days2004: Unhealthy for Sensitive Groups 1 of 363 days2005: Good 272 of 364 days2005: Moderate 86 of 364 days2005: Unhealthy for Sensitive Groups 6 of 364 days20052006: Good 285 of 364 days2006: Moderate 79 of 364 days2007: Good 285 of 364 days2007: Moderate 76 of 364 days2007: Unhealthy for Sensitive Groups 3 of 364 days2008: Good 303 of 361 days2008: Moderate 57 of 361 days2008: Unhealthy for Sensitive Groups 1 of 361 days2009: Good 289 of 329 days2009: Moderate 40 of 329 days2010: Good 281 of 356 days2010: Moderate 72 of 356 days2010: Unhealthy for Sensitive Groups 3 of 356 days20102011: Good 302 of 354 days2011: Moderate 52 of 354 days2012: Good 301 of 360 days2012: Moderate 57 of 360 days2012: Unhealthy for Sensitive Groups 2 of 360 days2013: Good 325 of 361 days2013: Moderate 36 of 361 days2014: Good 325 of 361 days2014: Moderate 36 of 361 days2015: Good 326 of 355 days2015: Moderate 28 of 355 days2015: Unhealthy for Sensitive Groups 1 of 355 days20152016: Good 326 of 356 days2016: Moderate 29 of 356 days2016: Unhealthy for Sensitive Groups 1 of 356 days2017: Good 335 of 351 days2017: Moderate 16 of 351 days2018: Good 332 of 365 days2018: Moderate 33 of 365 days2019: Good 343 of 362 days2019: Moderate 19 of 362 days2020: Good 357 of 359 days2020: Moderate 2 of 359 days20202021: Good 334 of 363 days2021: Moderate 29 of 363 days2022: Good 351 of 364 days2022: Moderate 13 of 364 days2023: Good 331 of 363 days2023: Moderate 32 of 363 days2024: Good 343 of 360 days2024: Moderate 17 of 360 days2025: Good 342 of 363 days2025: Moderate 21 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 year0501001990: 90th percentile AQI 841991: 90th percentile AQI 931992: 90th percentile AQI 711993: 90th percentile AQI 901994: 90th percentile AQI 831995: 90th percentile AQI 901996: 90th percentile AQI 841997: 90th percentile AQI 801998: 90th percentile AQI 971999: 90th percentile AQI 972000: 90th percentile AQI 772001: 90th percentile AQI 742002: 90th percentile AQI 772003: 90th percentile AQI 642004: 90th percentile AQI 612005: 90th percentile AQI 702006: 90th percentile AQI 642007: 90th percentile AQI 642008: 90th percentile AQI 582009: 90th percentile AQI 522010: 90th percentile AQI 612011: 90th percentile AQI 542012: 90th percentile AQI 582013: 90th percentile AQI 502014: 90th percentile AQI 502015: 90th percentile AQI 502016: 90th percentile AQI 492017: 90th percentile AQI 472018: 90th percentile AQI 492019: 90th percentile AQI 472020: 90th percentile AQI 442021: 90th percentile AQI 482022: 90th percentile AQI 472023: 90th percentile AQI 492024: 90th percentile AQI 482025: 90th percentile AQI 471990: Median AQI 401991: Median AQI 421992: Median AQI 381993: Median AQI 441994: Median AQI 421995: Median AQI 431996: Median AQI 411997: Median AQI 431998: Median AQI 441999: Median AQI 452000: Median AQI 412001: Median AQI 422002: Median AQI 392003: Median AQI 382004: Median AQI 372005: Median AQI 392006: Median AQI 372007: Median AQI 382008: Median AQI 372009: Median AQI 342010: Median AQI 392011: Median AQI 372012: Median AQI 382013: Median AQI 362014: Median AQI 362015: Median AQI 362016: Median AQI 362017: Median AQI 362018: Median AQI 352019: Median AQI 352020: Median AQI 342021: Median AQI 342022: Median AQI 352023: Median AQI 362024: Median AQI 372025: Median AQI 3619901995200020052010201520202025
  • 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
Ozone35096%
Fine particles (PM2.5)134%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025363342210000364771Ozone
2024360343170000374871Ozone
2023363331320000364991Ozone
2022364351130000354777Ozone
2021363334290000344884Ozone
202035935720000344451Ozone
2019362343190000354761Ozone
2018365332330000354974Ozone
2017351335160000364774Ozone
20163563262910003649105Ozone
20153553262810003650115Ozone
2014361325360000365090Ozone
2013361325360000365097Ozone
20123603015720003858133Ozone
2011354302520000375497Ozone
20103562817230003961136Ozone
2009329289400000345284Ozone
20083613035710003758108Ozone
20073642857630003864109Ozone
2006364285790000376499Ozone
20053642728660003970143Ozone
20043632907210003761105Ozone
20033622797661003864151Ozone
200236326485140003977147Ozone
200136526487140004274140Ozone
200036424910393004177159Ozone
1999363220114272004597185Ozone
1998360207124263004497174Ozone
1997362246102131004380151Ozone
199636224798152004184156Ozone
199536224099203004390159Ozone
199436024096204004283179Ozone
1993359224112194004490179Ozone
19923542519760003871133Ozone
199136124095260004293150Ozone
199036127763183004084197Ozone

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 West Virginia with a similar median AQI in 2025

All monitored counties in West Virginia

Source: U.S. EPA AirData, “Annual AQI by County” files for 1990–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem