EnviroNearby

Campbell County, Kentucky air quality history

Daily Air Quality Index summaries from EPA monitors in Campbell, Kentucky, 1980–2025.

76%
Good days in 2025
39
Median daily AQI, 2025
4
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 Campbell, Kentucky on 365 days. 276 of those days (76%) were in the Good range, and the median daily AQI was 39. That median is about the same as the typical monitored county in Kentucky (median 39 across 25 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 198 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 71% in 1980–1982 versus 73% in 2023–2025.

Years with fewer than 120 monitored days (2006) 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 247 of 354 days1980: Moderate 71 of 354 days1980: Unhealthy for Sensitive Groups 23 of 354 days1980: Unhealthy 9 of 354 days1980: Very Unhealthy 4 of 354 days19801981: Good 273 of 365 days1981: Moderate 65 of 365 days1981: Unhealthy for Sensitive Groups 24 of 365 days1981: Unhealthy 3 of 365 days1982: Good 235 of 337 days1982: Moderate 66 of 337 days1982: Unhealthy for Sensitive Groups 27 of 337 days1982: Unhealthy 8 of 337 days1982: Very Unhealthy 1 of 337 days1983: Good 215 of 358 days1983: Moderate 80 of 358 days1983: Unhealthy for Sensitive Groups 33 of 358 days1983: Unhealthy 24 of 358 days1983: Very Unhealthy 6 of 358 days1984: Good 266 of 365 days1984: Moderate 70 of 365 days1984: Unhealthy for Sensitive Groups 22 of 365 days1984: Unhealthy 7 of 365 days1985: Good 245 of 365 days1985: Moderate 87 of 365 days1985: Unhealthy for Sensitive Groups 27 of 365 days1985: Unhealthy 5 of 365 days1985: Very Unhealthy 1 of 365 days19851986: Good 262 of 349 days1986: Moderate 59 of 349 days1986: Unhealthy for Sensitive Groups 21 of 349 days1986: Unhealthy 6 of 349 days1986: Very Unhealthy 1 of 349 days1987: Good 221 of 353 days1987: Moderate 76 of 353 days1987: Unhealthy for Sensitive Groups 26 of 353 days1987: Unhealthy 27 of 353 days1987: Very Unhealthy 3 of 353 days1988: Good 251 of 358 days1988: Moderate 53 of 358 days1988: Unhealthy for Sensitive Groups 23 of 358 days1988: Unhealthy 21 of 358 days1988: Very Unhealthy 10 of 358 days1989: Good 274 of 364 days1989: Moderate 64 of 364 days1989: Unhealthy for Sensitive Groups 17 of 364 days1989: Unhealthy 7 of 364 days1989: Very Unhealthy 2 of 364 days1990: Good 279 of 355 days1990: Moderate 53 of 355 days1990: Unhealthy for Sensitive Groups 18 of 355 days1990: Unhealthy 5 of 355 days19901991: Good 285 of 363 days1991: Moderate 53 of 363 days1991: Unhealthy for Sensitive Groups 16 of 363 days1991: Unhealthy 9 of 363 days1992: Good 323 of 365 days1992: Moderate 36 of 365 days1992: Unhealthy for Sensitive Groups 6 of 365 days1993: Good 281 of 345 days1993: Moderate 46 of 345 days1993: Unhealthy for Sensitive Groups 17 of 345 days1993: Unhealthy 1 of 345 days1994: Good 278 of 358 days1994: Moderate 62 of 358 days1994: Unhealthy for Sensitive Groups 7 of 358 days1994: Unhealthy 11 of 358 days1995: Good 287 of 364 days1995: Moderate 52 of 364 days1995: Unhealthy for Sensitive Groups 20 of 364 days1995: Unhealthy 4 of 364 days1995: Very Unhealthy 1 of 364 days19951996: Good 292 of 361 days1996: Moderate 48 of 361 days1996: Unhealthy for Sensitive Groups 17 of 361 days1996: Unhealthy 3 of 361 days1996: Very Unhealthy 1 of 361 days1997: Good 298 of 364 days1997: Moderate 48 of 364 days1997: Unhealthy for Sensitive Groups 14 of 364 days1997: Unhealthy 4 of 364 days1998: Good 264 of 358 days1998: Moderate 62 of 358 days1998: Unhealthy for Sensitive Groups 26 of 358 days1998: Unhealthy 6 of 358 days1999: Good 202 of 352 days1999: Moderate 115 of 352 days1999: Unhealthy for Sensitive Groups 29 of 352 days1999: Unhealthy 6 of 352 days2000: Good 210 of 365 days2000: Moderate 134 of 365 days2000: Unhealthy for Sensitive Groups 14 of 365 days2000: Unhealthy 7 of 365 days20002001: Good 221 of 364 days2001: Moderate 117 of 364 days2001: Unhealthy for Sensitive Groups 20 of 364 days2001: Unhealthy 6 of 364 days2002: Good 219 of 363 days2002: Moderate 98 of 363 days2002: Unhealthy for Sensitive Groups 23 of 363 days2002: Unhealthy 20 of 363 days2002: Very Unhealthy 3 of 363 days2003: Good 227 of 355 days2003: Moderate 111 of 355 days2003: Unhealthy for Sensitive Groups 14 of 355 days2003: Unhealthy 3 of 355 days2004: Good 237 of 365 days2004: Moderate 116 of 365 days2004: Unhealthy for Sensitive Groups 12 of 365 days2005: Good 209 of 365 days2005: Moderate 115 of 365 days2005: Unhealthy for Sensitive Groups 33 of 365 days2005: Unhealthy 7 of 365 days2005: Very Unhealthy 1 of 365 days20052006: Good 59 of 71 days2006: Moderate 12 of 71 days2007: Good 62 of 184 days2007: Moderate 94 of 184 days2007: Unhealthy for Sensitive Groups 24 of 184 days2007: Unhealthy 4 of 184 days2008: Good 124 of 366 days2008: Moderate 233 of 366 days2008: Unhealthy for Sensitive Groups 9 of 366 days2009: Good 209 of 365 days2009: Moderate 154 of 365 days2009: Unhealthy for Sensitive Groups 2 of 365 days2010: Good 164 of 364 days2010: Moderate 193 of 364 days2010: Unhealthy for Sensitive Groups 7 of 364 days20102011: Good 126 of 365 days2011: Moderate 225 of 365 days2011: Unhealthy for Sensitive Groups 14 of 365 days2012: Good 163 of 364 days2012: Moderate 180 of 364 days2012: Unhealthy for Sensitive Groups 19 of 364 days2012: Unhealthy 1 of 364 days2012: Very Unhealthy 1 of 364 days2013: Good 199 of 365 days2013: Moderate 162 of 365 days2013: Unhealthy for Sensitive Groups 4 of 365 days2014: Good 192 of 364 days2014: Moderate 168 of 364 days2014: Unhealthy for Sensitive Groups 4 of 364 days2015: Good 174 of 364 days2015: Moderate 184 of 364 days2015: Unhealthy for Sensitive Groups 6 of 364 days20152016: Good 160 of 363 days2016: Moderate 200 of 363 days2016: Unhealthy for Sensitive Groups 3 of 363 days2017: Good 176 of 362 days2017: Moderate 184 of 362 days2017: Unhealthy for Sensitive Groups 2 of 362 days2018: Good 206 of 350 days2018: Moderate 143 of 350 days2018: Unhealthy for Sensitive Groups 1 of 350 days2019: Good 241 of 362 days2019: Moderate 120 of 362 days2019: Unhealthy for Sensitive Groups 1 of 362 days2020: Good 246 of 366 days2020: Moderate 120 of 366 days20202021: Good 230 of 362 days2021: Moderate 131 of 362 days2021: Unhealthy for Sensitive Groups 1 of 362 days2022: Good 246 of 362 days2022: Moderate 115 of 362 days2022: Unhealthy for Sensitive Groups 1 of 362 days2023: Good 234 of 360 days2023: Moderate 120 of 360 days2023: Unhealthy for Sensitive Groups 4 of 360 days2023: Unhealthy 2 of 360 days2024: Good 285 of 366 days2024: Moderate 78 of 366 days2024: Unhealthy for Sensitive Groups 3 of 366 days2025: Good 276 of 365 days2025: Moderate 85 of 365 days2025: Unhealthy for Sensitive Groups 4 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 1011981: 90th percentile AQI 861982: 90th percentile AQI 1011983: 90th percentile AQI 1471984: 90th percentile AQI 931985: 90th percentile AQI 931986: 90th percentile AQI 901987: 90th percentile AQI 1361988: 90th percentile AQI 1401989: 90th percentile AQI 871990: 90th percentile AQI 841991: 90th percentile AQI 901992: 90th percentile AQI 511993: 90th percentile AQI 841994: 90th percentile AQI 801995: 90th percentile AQI 801996: 90th percentile AQI 801997: 90th percentile AQI 741998: 90th percentile AQI 901999: 90th percentile AQI 1002000: 90th percentile AQI 842001: 90th percentile AQI 872002: 90th percentile AQI 1192003: 90th percentile AQI 802004: 90th percentile AQI 742005: 90th percentile AQI 1052006: 90th percentile AQI 532007: 90th percentile AQI 1192008: 90th percentile AQI 742009: 90th percentile AQI 642010: 90th percentile AQI 742011: 90th percentile AQI 802012: 90th percentile AQI 802013: 90th percentile AQI 672014: 90th percentile AQI 672015: 90th percentile AQI 712016: 90th percentile AQI 672017: 90th percentile AQI 652018: 90th percentile AQI 602019: 90th percentile AQI 602020: 90th percentile AQI 592021: 90th percentile AQI 642022: 90th percentile AQI 582023: 90th percentile AQI 662024: 90th percentile AQI 582025: 90th percentile AQI 571980: Median AQI 411981: Median AQI 411982: Median AQI 421983: Median AQI 441984: Median AQI 421985: Median AQI 411986: Median AQI 391987: Median AQI 441988: Median AQI 411989: Median AQI 401990: Median AQI 341991: Median AQI 351992: Median AQI 321993: Median AQI 361994: Median AQI 401995: Median AQI 381996: Median AQI 361997: Median AQI 351998: Median AQI 341999: Median AQI 462000: Median AQI 472001: Median AQI 442002: Median AQI 432003: Median AQI 432004: Median AQI 432005: Median AQI 462006: Median AQI 252007: Median AQI 572008: Median AQI 542009: Median AQI 472010: Median AQI 522011: Median AQI 552012: Median AQI 522013: Median AQI 482014: Median AQI 492015: Median AQI 512016: Median AQI 522017: Median AQI 512018: Median AQI 452019: Median AQI 442020: Median AQI 432021: Median AQI 442022: Median AQI 432023: Median AQI 442024: 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)19854%
Ozone16545%
Nitrogen dioxide (NO₂)21%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652768540003957122PM2.5
20243662857830004058108PM2.5
202336023412042004466187PM2.5
202236224611510004358105PM2.5
202136223013110004464101PM2.5
20203662461200000435993PM2.5
201936224112010004460108PM2.5
201835020614310004560101PM2.5
201736217618420005165115PM2.5
201636316020030005267115PM2.5
201536417418460005171129PM2.5
201436419216840004967112PM2.5
201336519916240004867129PM2.5
2012364163180191105280201PM2.5
2011365126225140005580147PM2.5
201036416419370005274133PM2.5
200936520915420004764115PM2.5
200836612423390005474147PM2.5
200718462942440057119174PM2.5
20067159120000255381NO2
20053652091153371046105201Ozone
2004365237116120004374147Ozone
2003355227111143004380169Ozone
20023632199823203043119209Ozone
2001364221117206004487187Ozone
2000365210134147004784192Ozone
19993522021152960046100166Ozone
199835826462266003490195NO2
199736429848144003574192NO2
199636129248173103680209NO2
199536428752204103880202NO2
199435827862711004080174NO2
199334528146171003684187NO2
19923653233660003251143NO2
199136328553169003590185NO2
199035527953185003484197NO2
198936427464177204087208NO2
198835825153232110041140237NO2
19873532217626273044136216NO2
198634926259216103990203NO2
198536524587275104193207Ozone
198436526670227004293179NO2
19833582158033246044147222NO2
1982337235662781042101206NO2
198136527365243004186156NO2
1980354247712394041101214NO2

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 Kentucky with a similar median AQI in 2025

All monitored counties in Kentucky

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