EnviroNearby

Kanawha County, West Virginia air quality history

Daily Air Quality Index summaries from EPA monitors in Kanawha, West Virginia, 1980–2025.

77%
Good days in 2025
39
Median daily AQI, 2025
0
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 Kanawha, West Virginia on 365 days. 281 of those days (77%) were in the Good range, and the median daily AQI was 39. That median is about the same as the typical monitored county in West Virginia (median 39 across 12 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 243 days. Across the years with fuller monitoring, the share of Good days fell: an average of 79% in 1980–1982 versus 75% 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 290 of 364 days1980: Moderate 61 of 364 days1980: Unhealthy for Sensitive Groups 12 of 364 days1980: Unhealthy 1 of 364 days19801981: Good 284 of 363 days1981: Moderate 63 of 363 days1981: Unhealthy for Sensitive Groups 16 of 363 days1982: Good 287 of 364 days1982: Moderate 61 of 364 days1982: Unhealthy for Sensitive Groups 14 of 364 days1982: Unhealthy 2 of 364 days1983: Good 264 of 365 days1983: Moderate 73 of 365 days1983: Unhealthy for Sensitive Groups 19 of 365 days1983: Unhealthy 8 of 365 days1983: Very Unhealthy 1 of 365 days1984: Good 263 of 366 days1984: Moderate 83 of 366 days1984: Unhealthy for Sensitive Groups 16 of 366 days1984: Unhealthy 4 of 366 days1985: Good 251 of 363 days1985: Moderate 94 of 363 days1985: Unhealthy for Sensitive Groups 16 of 363 days1985: Unhealthy 2 of 363 days19851986: Good 259 of 365 days1986: Moderate 76 of 365 days1986: Unhealthy for Sensitive Groups 23 of 365 days1986: Unhealthy 7 of 365 days1987: Good 238 of 365 days1987: Moderate 92 of 365 days1987: Unhealthy for Sensitive Groups 25 of 365 days1987: Unhealthy 10 of 365 days1988: Good 238 of 366 days1988: Moderate 75 of 366 days1988: Unhealthy for Sensitive Groups 23 of 366 days1988: Unhealthy 22 of 366 days1988: Very Unhealthy 8 of 366 days1989: Good 290 of 364 days1989: Moderate 66 of 364 days1989: Unhealthy for Sensitive Groups 6 of 364 days1989: Unhealthy 2 of 364 days1990: Good 310 of 364 days1990: Moderate 44 of 364 days1990: Unhealthy for Sensitive Groups 9 of 364 days1990: Unhealthy 1 of 364 days19901991: Good 282 of 361 days1991: Moderate 60 of 361 days1991: Unhealthy for Sensitive Groups 12 of 361 days1991: Unhealthy 7 of 361 days1992: Good 359 of 365 days1992: Moderate 6 of 365 days1993: Good 353 of 365 days1993: Moderate 12 of 365 days1994: Good 305 of 365 days1994: Moderate 51 of 365 days1994: Unhealthy for Sensitive Groups 8 of 365 days1994: Unhealthy 1 of 365 days1995: Good 289 of 365 days1995: Moderate 56 of 365 days1995: Unhealthy for Sensitive Groups 14 of 365 days1995: Unhealthy 6 of 365 days19951996: Good 312 of 366 days1996: Moderate 45 of 366 days1996: Unhealthy for Sensitive Groups 7 of 366 days1996: Unhealthy 2 of 366 days1997: Good 317 of 365 days1997: Moderate 38 of 365 days1997: Unhealthy for Sensitive Groups 10 of 365 days1998: Good 264 of 365 days1998: Moderate 57 of 365 days1998: Unhealthy for Sensitive Groups 36 of 365 days1998: Unhealthy 8 of 365 days1999: Good 131 of 323 days1999: Moderate 144 of 323 days1999: Unhealthy for Sensitive Groups 34 of 323 days1999: Unhealthy 11 of 323 days1999: Very Unhealthy 3 of 323 days2000: Good 105 of 260 days2000: Moderate 136 of 260 days2000: Unhealthy for Sensitive Groups 17 of 260 days2000: Unhealthy 2 of 260 days20002001: Good 100 of 264 days2001: Moderate 136 of 264 days2001: Unhealthy for Sensitive Groups 27 of 264 days2001: Unhealthy 1 of 264 days2002: Good 200 of 365 days2002: Moderate 126 of 365 days2002: Unhealthy for Sensitive Groups 34 of 365 days2002: Unhealthy 5 of 365 days2003: Good 218 of 365 days2003: Moderate 131 of 365 days2003: Unhealthy for Sensitive Groups 12 of 365 days2003: Unhealthy 4 of 365 days2004: Good 230 of 366 days2004: Moderate 131 of 366 days2004: Unhealthy for Sensitive Groups 5 of 366 days2005: Good 196 of 364 days2005: Moderate 146 of 364 days2005: Unhealthy for Sensitive Groups 20 of 364 days2005: Unhealthy 2 of 364 days20052006: Good 204 of 364 days2006: Moderate 144 of 364 days2006: Unhealthy for Sensitive Groups 15 of 364 days2006: Unhealthy 1 of 364 days2007: Good 71 of 364 days2007: Moderate 261 of 364 days2007: Unhealthy for Sensitive Groups 30 of 364 days2007: Unhealthy 2 of 364 days2008: Good 224 of 365 days2008: Moderate 133 of 365 days2008: Unhealthy for Sensitive Groups 8 of 365 days2009: Good 111 of 365 days2009: Moderate 254 of 365 days2010: Good 219 of 365 days2010: Moderate 143 of 365 days2010: Unhealthy for Sensitive Groups 2 of 365 days2010: Unhealthy 1 of 365 days20102011: Good 231 of 361 days2011: Moderate 119 of 361 days2011: Unhealthy for Sensitive Groups 8 of 361 days2011: Unhealthy 3 of 361 days2012: Good 200 of 337 days2012: Moderate 124 of 337 days2012: Unhealthy for Sensitive Groups 13 of 337 days2013: Good 258 of 349 days2013: Moderate 89 of 349 days2013: Unhealthy for Sensitive Groups 2 of 349 days2014: Good 273 of 364 days2014: Moderate 91 of 364 days2015: Good 281 of 359 days2015: Moderate 76 of 359 days2015: Unhealthy for Sensitive Groups 1 of 359 days2015: Unhealthy 1 of 359 days20152016: Good 245 of 354 days2016: Moderate 107 of 354 days2016: Unhealthy for Sensitive Groups 2 of 354 days2017: Good 214 of 365 days2017: Moderate 150 of 365 days2017: Unhealthy for Sensitive Groups 1 of 365 days2018: Good 217 of 364 days2018: Moderate 146 of 364 days2018: Unhealthy for Sensitive Groups 1 of 364 days2019: Good 262 of 365 days2019: Moderate 103 of 365 days2020: Good 287 of 366 days2020: Moderate 79 of 366 days20202021: Good 239 of 365 days2021: Moderate 126 of 365 days2022: Good 253 of 353 days2022: Moderate 100 of 353 days2023: Good 254 of 361 days2023: Moderate 106 of 361 days2023: Unhealthy 1 of 361 days2024: Good 283 of 364 days2024: Moderate 81 of 364 days2025: Good 281 of 365 days2025: Moderate 84 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 671981: 90th percentile AQI 741982: 90th percentile AQI 681983: 90th percentile AQI 931984: 90th percentile AQI 841985: 90th percentile AQI 801986: 90th percentile AQI 971987: 90th percentile AQI 1001988: 90th percentile AQI 1401989: 90th percentile AQI 681990: 90th percentile AQI 571991: 90th percentile AQI 771992: 90th percentile AQI 411993: 90th percentile AQI 421994: 90th percentile AQI 641995: 90th percentile AQI 801996: 90th percentile AQI 611997: 90th percentile AQI 541998: 90th percentile AQI 1121999: 90th percentile AQI 1192000: 90th percentile AQI 992001: 90th percentile AQI 1012002: 90th percentile AQI 1012003: 90th percentile AQI 802004: 90th percentile AQI 752005: 90th percentile AQI 872006: 90th percentile AQI 802007: 90th percentile AQI 972008: 90th percentile AQI 712009: 90th percentile AQI 712010: 90th percentile AQI 742011: 90th percentile AQI 712012: 90th percentile AQI 802013: 90th percentile AQI 602014: 90th percentile AQI 612015: 90th percentile AQI 612016: 90th percentile AQI 582017: 90th percentile AQI 602018: 90th percentile AQI 602019: 90th percentile AQI 582020: 90th percentile AQI 552021: 90th percentile AQI 642022: 90th percentile AQI 572023: 90th percentile AQI 582024: 90th percentile AQI 572025: 90th percentile AQI 551980: Median AQI 351981: Median AQI 361982: Median AQI 391983: Median AQI 391984: Median AQI 421985: Median AQI 421986: Median AQI 411987: Median AQI 451988: Median AQI 441989: Median AQI 401990: Median AQI 371991: Median AQI 371992: Median AQI 261993: Median AQI 271994: Median AQI 331995: Median AQI 351996: Median AQI 341997: Median AQI 341998: Median AQI 371999: Median AQI 582000: Median AQI 582001: Median AQI 582002: Median AQI 452003: Median AQI 432004: Median AQI 412005: Median AQI 462006: Median AQI 452007: Median AQI 642008: Median AQI 442009: Median AQI 572010: Median AQI 442011: Median AQI 412012: Median AQI 462013: Median AQI 392014: Median AQI 382015: Median AQI 362016: Median AQI 412017: Median AQI 472018: Median AQI 462019: Median AQI 442020: Median AQI 412021: Median AQI 442022: Median AQI 412023: Median AQI 422024: Median AQI 402025: Median AQI 391980198519901995200020052010201520202025
  • 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)24367%
Ozone12233%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025365281840000395569PM2.5
2024364283810000405790PM2.5
202336125410601004258153PM2.5
20223532531000000415790PM2.5
20213652391260000446497PM2.5
2020366287790000415585PM2.5
20193652621030000445893Ozone
201836421714610004660105PM2.5
201736521415010004760105PM2.5
201635424510720004158119PM2.5
20153592817611003661167Ozone
20143642739100003861100Ozone
20133492588920003960112Ozone
2012337200124130004680140Ozone
201136123111983004171164Ozone
201036521914321004474154Ozone
20093651112540000577193PM2.5
200836522413380004471146Ozone
200736471261302006497164PM2.5
2006364204144151004580159Ozone
2005364196146202004687154Ozone
200436623013150004175147Ozone
2003365218131124004380177Ozone
20023652001263450045101172Ozone
20012641001362710058101159Ozone
2000260105136172005899159Ozone
199932313114434113058119214Ozone
1998365264573680037112172Ozone
199736531738100003454150NO2
19963663124572003461187NO2
199536528956146003580197NO2
19943653055181003364151Ozone
1993365353120000274298Ozone
199236535960000264184NO2
199136128260127003777200NO2
19903643104491003757185NO2
19893642906662004068177NO2
19883662387523228044140230NO2
19873652389225100045100190NO2
198636525976237004197182NO2
198536325194162004280195NO2
198436626383164004284166NO2
198336526473198103993212NO2
198236428761142003968174NO2
198136328463160003674136NO2
198036429061121003567154Ozone

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 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