EnviroNearby

McCracken County, Kentucky air quality history

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

75%
Good days in 2025
41
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 McCracken, Kentucky on 365 days. 272 of those days (75%) were in the Good range, and the median daily AQI was 41. 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 213 days. Across the years with fuller monitoring, the share of Good days fell: an average of 72% in 1980–1982 versus 69% 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 251 of 365 days1980: Moderate 83 of 365 days1980: Unhealthy for Sensitive Groups 25 of 365 days1980: Unhealthy 6 of 365 days19801981: Good 250 of 365 days1981: Moderate 94 of 365 days1981: Unhealthy for Sensitive Groups 20 of 365 days1981: Unhealthy 1 of 365 days1982: Good 288 of 365 days1982: Moderate 71 of 365 days1982: Unhealthy for Sensitive Groups 6 of 365 days1983: Good 251 of 363 days1983: Moderate 74 of 363 days1983: Unhealthy for Sensitive Groups 30 of 363 days1983: Unhealthy 8 of 363 days1984: Good 273 of 366 days1984: Moderate 69 of 366 days1984: Unhealthy for Sensitive Groups 17 of 366 days1984: Unhealthy 7 of 366 days1985: Good 290 of 365 days1985: Moderate 65 of 365 days1985: Unhealthy for Sensitive Groups 10 of 365 days19851986: Good 259 of 363 days1986: Moderate 73 of 363 days1986: Unhealthy for Sensitive Groups 27 of 363 days1986: Unhealthy 4 of 363 days1987: Good 246 of 365 days1987: Moderate 81 of 365 days1987: Unhealthy for Sensitive Groups 29 of 365 days1987: Unhealthy 9 of 365 days1988: Good 251 of 366 days1988: Moderate 82 of 366 days1988: Unhealthy for Sensitive Groups 27 of 366 days1988: Unhealthy 5 of 366 days1988: Very Unhealthy 1 of 366 days1989: Good 290 of 365 days1989: Moderate 63 of 365 days1989: Unhealthy for Sensitive Groups 12 of 365 days1990: Good 284 of 365 days1990: Moderate 61 of 365 days1990: Unhealthy for Sensitive Groups 19 of 365 days1990: Unhealthy 1 of 365 days19901991: Good 284 of 365 days1991: Moderate 61 of 365 days1991: Unhealthy for Sensitive Groups 18 of 365 days1991: Unhealthy 2 of 365 days1992: Good 299 of 366 days1992: Moderate 61 of 366 days1992: Unhealthy for Sensitive Groups 6 of 366 days1993: Good 324 of 365 days1993: Moderate 38 of 365 days1993: Unhealthy for Sensitive Groups 2 of 365 days1993: Unhealthy 1 of 365 days1994: Good 289 of 365 days1994: Moderate 63 of 365 days1994: Unhealthy for Sensitive Groups 11 of 365 days1994: Unhealthy 2 of 365 days1995: Good 293 of 365 days1995: Moderate 61 of 365 days1995: Unhealthy for Sensitive Groups 11 of 365 days19951996: Good 312 of 366 days1996: Moderate 41 of 366 days1996: Unhealthy for Sensitive Groups 13 of 366 days1997: Good 301 of 365 days1997: Moderate 48 of 365 days1997: Unhealthy for Sensitive Groups 13 of 365 days1997: Unhealthy 3 of 365 days1998: Good 240 of 365 days1998: Moderate 79 of 365 days1998: Unhealthy for Sensitive Groups 41 of 365 days1998: Unhealthy 5 of 365 days1999: Good 195 of 365 days1999: Moderate 134 of 365 days1999: Unhealthy for Sensitive Groups 28 of 365 days1999: Unhealthy 8 of 365 days2000: Good 203 of 366 days2000: Moderate 138 of 366 days2000: Unhealthy for Sensitive Groups 21 of 366 days2000: Unhealthy 3 of 366 days2000: Very Unhealthy 1 of 366 days20002001: Good 208 of 365 days2001: Moderate 142 of 365 days2001: Unhealthy for Sensitive Groups 14 of 365 days2001: Unhealthy 1 of 365 days2002: Good 243 of 363 days2002: Moderate 103 of 363 days2002: Unhealthy for Sensitive Groups 13 of 363 days2002: Unhealthy 4 of 363 days2003: Good 234 of 365 days2003: Moderate 119 of 365 days2003: Unhealthy for Sensitive Groups 12 of 365 days2004: Good 242 of 366 days2004: Moderate 123 of 366 days2004: Unhealthy for Sensitive Groups 1 of 366 days2005: Good 207 of 365 days2005: Moderate 138 of 365 days2005: Unhealthy for Sensitive Groups 20 of 365 days20052006: Good 225 of 359 days2006: Moderate 126 of 359 days2006: Unhealthy for Sensitive Groups 8 of 359 days2007: Good 138 of 363 days2007: Moderate 198 of 363 days2007: Unhealthy for Sensitive Groups 27 of 363 days2008: Good 180 of 363 days2008: Moderate 179 of 363 days2008: Unhealthy for Sensitive Groups 4 of 363 days2009: Good 200 of 364 days2009: Moderate 162 of 364 days2009: Unhealthy for Sensitive Groups 2 of 364 days2010: Good 179 of 365 days2010: Moderate 179 of 365 days2010: Unhealthy for Sensitive Groups 7 of 365 days20102011: Good 181 of 365 days2011: Moderate 180 of 365 days2011: Unhealthy for Sensitive Groups 3 of 365 days2011: Unhealthy 1 of 365 days2012: Good 189 of 365 days2012: Moderate 153 of 365 days2012: Unhealthy for Sensitive Groups 19 of 365 days2012: Unhealthy 3 of 365 days2012: Very Unhealthy 1 of 365 days2013: Good 238 of 365 days2013: Moderate 127 of 365 days2014: Good 231 of 365 days2014: Moderate 134 of 365 days2015: Good 196 of 365 days2015: Moderate 166 of 365 days2015: Unhealthy for Sensitive Groups 3 of 365 days20152016: Good 153 of 366 days2016: Moderate 212 of 366 days2016: Unhealthy for Sensitive Groups 1 of 366 days2017: Good 187 of 364 days2017: Moderate 176 of 364 days2017: Unhealthy for Sensitive Groups 1 of 364 days2018: Good 183 of 364 days2018: Moderate 181 of 364 days2019: Good 186 of 361 days2019: Moderate 175 of 361 days2020: Good 239 of 366 days2020: Moderate 126 of 366 days2020: Unhealthy for Sensitive Groups 1 of 366 days20202021: Good 221 of 363 days2021: Moderate 140 of 363 days2021: Unhealthy for Sensitive Groups 2 of 363 days2022: Good 217 of 345 days2022: Moderate 125 of 345 days2022: Unhealthy for Sensitive Groups 3 of 345 days2023: Good 203 of 355 days2023: Moderate 145 of 355 days2023: Unhealthy for Sensitive Groups 7 of 355 days2024: Good 269 of 363 days2024: Moderate 93 of 363 days2024: Unhealthy for Sensitive Groups 1 of 363 days2025: Good 272 of 365 days2025: Moderate 93 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 971981: 90th percentile AQI 771982: 90th percentile AQI 671983: 90th percentile AQI 1011984: 90th percentile AQI 871985: 90th percentile AQI 741986: 90th percentile AQI 901987: 90th percentile AQI 1051988: 90th percentile AQI 981989: 90th percentile AQI 671990: 90th percentile AQI 841991: 90th percentile AQI 801992: 90th percentile AQI 581993: 90th percentile AQI 511994: 90th percentile AQI 711995: 90th percentile AQI 711996: 90th percentile AQI 741997: 90th percentile AQI 641998: 90th percentile AQI 1081999: 90th percentile AQI 1002000: 90th percentile AQI 932001: 90th percentile AQI 842002: 90th percentile AQI 742003: 90th percentile AQI 782004: 90th percentile AQI 672005: 90th percentile AQI 872006: 90th percentile AQI 772007: 90th percentile AQI 932008: 90th percentile AQI 742009: 90th percentile AQI 672010: 90th percentile AQI 802011: 90th percentile AQI 712012: 90th percentile AQI 872013: 90th percentile AQI 622014: 90th percentile AQI 642015: 90th percentile AQI 672016: 90th percentile AQI 642017: 90th percentile AQI 642018: 90th percentile AQI 642019: 90th percentile AQI 632020: 90th percentile AQI 612021: 90th percentile AQI 642022: 90th percentile AQI 642023: 90th percentile AQI 662024: 90th percentile AQI 562025: 90th percentile AQI 581980: Median AQI 401981: Median AQI 431982: Median AQI 381983: Median AQI 381984: Median AQI 391985: Median AQI 371986: Median AQI 381987: Median AQI 401988: Median AQI 401989: Median AQI 361990: Median AQI 381991: Median AQI 331992: Median AQI 361993: Median AQI 311994: Median AQI 361995: Median AQI 351996: Median AQI 331997: Median AQI 351998: Median AQI 401999: Median AQI 482000: Median AQI 462001: Median AQI 452002: Median AQI 412003: Median AQI 442004: Median AQI 422005: Median AQI 452006: Median AQI 422007: Median AQI 562008: Median AQI 512009: Median AQI 482010: Median AQI 512011: Median AQI 512012: Median AQI 502013: Median AQI 432014: Median AQI 442015: Median AQI 482016: Median AQI 532017: Median AQI 502018: Median AQI 502019: Median AQI 502020: Median AQI 442021: Median AQI 442022: Median AQI 452023: Median AQI 472024: Median AQI 422025: Median AQI 411980198519901995200020052010201520202025
  • 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)21358%
Ozone14439%
Nitrogen dioxide (NO₂)82%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025365272930000415897PM2.5
20243632699310004256101PM2.5
202335520314570004766126PM2.5
202234521712530004564143PM2.5
202136322114020004464109PM2.5
202036623912610004461111PM2.5
20193611861750000506397PM2.5
201836418318100005064100PM2.5
201736418717610005064111PM2.5
201636615321210005364105PM2.5
201536519616630004867115PM2.5
20143652311340000446493PM2.5
201336523812700004362100PM2.5
2012365189153193105087202Ozone
201136518118031005171159PM2.5
201036517917970005180122PM2.5
200936420016220004867115PM2.5
200836318017940005174112PM2.5
2007363138198270005693143PM2.5
200635922512680004277147Ozone
2005365207138200004587143Ozone
200436624212310004267112Ozone
2003365234119120004478150Ozone
2002363243103134004174169Ozone
2001365208142141004584156Ozone
2000366203138213104693202Ozone
19993651951342880048100192Ozone
1998365240794150040108182Ozone
199736530148133003564185Ozone
199636631241130003374129NO2
199536529361110003571150Ozone
199436528963112003671166Ozone
19933653243821003151154NO2
19923662996160003658150Ozone
199136528461182003380190Ozone
199036528461191003884159NO2
198936529063120003667140NO2
198836625182275104098206NO2
1987365246812990040105182Ozone
198636325973274003890200Ozone
198536529065100003774140Ozone
198436627369177003987179NO2
1983363251743080038101179Ozone
19823652887160003867136Ozone
198136525094201004377156Ozone
198036525183256004097177NO2

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