EnviroNearby

Livingston County, Kentucky air quality history

Daily Air Quality Index summaries from EPA monitors in Livingston, Kentucky, 1981–2025.

89%
Good days in 2025
40
Median daily AQI, 2025
0
Days above 100 in 2025
228
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Livingston, Kentucky on 228 days. 202 of those days (89%) were in the Good range, and the median daily AQI was 40. 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 ozone on 228 days. Across the years with fuller monitoring, the share of Good days rose: an average of 57% in 1981–1983 versus 86% in 2023–2025.

EPA did not report an AQI for every day of 2025 here (228 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

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%1981: Good 154 of 222 days1981: Moderate 38 of 222 days1981: Unhealthy for Sensitive Groups 24 of 222 days1981: Unhealthy 6 of 222 days19811982: Good 188 of 272 days1982: Moderate 66 of 272 days1982: Unhealthy for Sensitive Groups 15 of 272 days1982: Unhealthy 3 of 272 days1983: Good 59 of 181 days1983: Moderate 61 of 181 days1983: Unhealthy for Sensitive Groups 44 of 181 days1983: Unhealthy 17 of 181 days1984: Good 123 of 189 days1984: Moderate 47 of 189 days1984: Unhealthy for Sensitive Groups 17 of 189 days1984: Unhealthy 2 of 189 days1985: Good 121 of 206 days1985: Moderate 63 of 206 days1985: Unhealthy for Sensitive Groups 20 of 206 days1985: Unhealthy 2 of 206 days1986: Good 118 of 222 days1986: Moderate 70 of 222 days1986: Unhealthy for Sensitive Groups 27 of 222 days1986: Unhealthy 7 of 222 days19861987: Good 106 of 236 days1987: Moderate 79 of 236 days1987: Unhealthy for Sensitive Groups 42 of 236 days1987: Unhealthy 9 of 236 days1988: Good 100 of 218 days1988: Moderate 53 of 218 days1988: Unhealthy for Sensitive Groups 45 of 218 days1988: Unhealthy 18 of 218 days1988: Very Unhealthy 2 of 218 days1989: Good 133 of 215 days1989: Moderate 62 of 215 days1989: Unhealthy for Sensitive Groups 19 of 215 days1989: Unhealthy 1 of 215 days1990: Good 112 of 174 days1990: Moderate 42 of 174 days1990: Unhealthy for Sensitive Groups 20 of 174 days1991: Good 121 of 204 days1991: Moderate 58 of 204 days1991: Unhealthy for Sensitive Groups 23 of 204 days1991: Unhealthy 2 of 204 days19911992: Good 153 of 239 days1992: Moderate 68 of 239 days1992: Unhealthy for Sensitive Groups 18 of 239 days1993: Good 149 of 232 days1993: Moderate 65 of 232 days1993: Unhealthy for Sensitive Groups 14 of 232 days1993: Unhealthy 3 of 232 days1993: Very Unhealthy 1 of 232 days1994: Good 141 of 232 days1994: Moderate 68 of 232 days1994: Unhealthy for Sensitive Groups 17 of 232 days1994: Unhealthy 5 of 232 days1994: Very Unhealthy 1 of 232 days1995: Good 136 of 238 days1995: Moderate 74 of 238 days1995: Unhealthy for Sensitive Groups 23 of 238 days1995: Unhealthy 5 of 238 days1996: Good 161 of 235 days1996: Moderate 57 of 235 days1996: Unhealthy for Sensitive Groups 14 of 235 days1996: Unhealthy 3 of 235 days19961997: Good 166 of 238 days1997: Moderate 49 of 238 days1997: Unhealthy for Sensitive Groups 14 of 238 days1997: Unhealthy 9 of 238 days1998: Good 108 of 240 days1998: Moderate 76 of 240 days1998: Unhealthy for Sensitive Groups 43 of 240 days1998: Unhealthy 11 of 240 days1998: Very Unhealthy 2 of 240 days1999: Good 94 of 234 days1999: Moderate 82 of 234 days1999: Unhealthy for Sensitive Groups 38 of 234 days1999: Unhealthy 18 of 234 days1999: Very Unhealthy 2 of 234 days2000: Good 133 of 255 days2000: Moderate 90 of 255 days2000: Unhealthy for Sensitive Groups 30 of 255 days2000: Unhealthy 2 of 255 days2001: Good 147 of 265 days2001: Moderate 89 of 265 days2001: Unhealthy for Sensitive Groups 26 of 265 days2001: Unhealthy 3 of 265 days20012002: Good 155 of 249 days2002: Moderate 55 of 249 days2002: Unhealthy for Sensitive Groups 28 of 249 days2002: Unhealthy 11 of 249 days2003: Good 139 of 241 days2003: Moderate 82 of 241 days2003: Unhealthy for Sensitive Groups 19 of 241 days2003: Unhealthy 1 of 241 days2004: Good 182 of 244 days2004: Moderate 60 of 244 days2004: Unhealthy for Sensitive Groups 2 of 244 days2005: Good 147 of 235 days2005: Moderate 72 of 235 days2005: Unhealthy for Sensitive Groups 15 of 235 days2005: Unhealthy 1 of 235 days2006: Good 175 of 243 days2006: Moderate 64 of 243 days2006: Unhealthy for Sensitive Groups 4 of 243 days20062007: Good 145 of 240 days2007: Moderate 80 of 240 days2007: Unhealthy for Sensitive Groups 15 of 240 days2008: Good 199 of 245 days2008: Moderate 46 of 245 days2009: Good 218 of 245 days2009: Moderate 26 of 245 days2009: Unhealthy for Sensitive Groups 1 of 245 days2010: Good 188 of 245 days2010: Moderate 56 of 245 days2010: Unhealthy for Sensitive Groups 1 of 245 days2011: Good 167 of 231 days2011: Moderate 60 of 231 days2011: Unhealthy for Sensitive Groups 4 of 231 days20112012: Good 149 of 242 days2012: Moderate 68 of 242 days2012: Unhealthy for Sensitive Groups 21 of 242 days2012: Unhealthy 4 of 242 days2013: Good 203 of 241 days2013: Moderate 37 of 241 days2013: Unhealthy for Sensitive Groups 1 of 241 days2014: Good 222 of 256 days2014: Moderate 34 of 256 days2015: Good 227 of 260 days2015: Moderate 32 of 260 days2015: Unhealthy for Sensitive Groups 1 of 260 days2016: Good 221 of 260 days2016: Moderate 38 of 260 days2016: Unhealthy for Sensitive Groups 1 of 260 days20162017: Good 234 of 259 days2017: Moderate 25 of 259 days2018: Good 226 of 257 days2018: Moderate 31 of 257 days2019: Good 237 of 261 days2019: Moderate 24 of 261 days2020: Good 235 of 248 days2020: Moderate 12 of 248 days2020: Unhealthy for Sensitive Groups 1 of 248 days2021: Good 225 of 243 days2021: Moderate 18 of 243 days20212022: Good 207 of 243 days2022: Moderate 34 of 243 days2022: Unhealthy for Sensitive Groups 2 of 243 days2023: Good 189 of 238 days2023: Moderate 44 of 238 days2023: Unhealthy for Sensitive Groups 5 of 238 days2024: Good 220 of 243 days2024: Moderate 23 of 243 days2025: Good 202 of 228 days2025: Moderate 26 of 228 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 year0501001501981: 90th percentile AQI 1121982: 90th percentile AQI 901983: 90th percentile AQI 1501984: 90th percentile AQI 1011985: 90th percentile AQI 1011986: 90th percentile AQI 1221987: 90th percentile AQI 1361988: 90th percentile AQI 1431989: 90th percentile AQI 1001990: 90th percentile AQI 1011991: 90th percentile AQI 1121992: 90th percentile AQI 931993: 90th percentile AQI 901994: 90th percentile AQI 1001995: 90th percentile AQI 1121996: 90th percentile AQI 931997: 90th percentile AQI 971998: 90th percentile AQI 1361999: 90th percentile AQI 1432000: 90th percentile AQI 1082001: 90th percentile AQI 1012002: 90th percentile AQI 1262003: 90th percentile AQI 972004: 90th percentile AQI 672005: 90th percentile AQI 872006: 90th percentile AQI 742007: 90th percentile AQI 932008: 90th percentile AQI 612009: 90th percentile AQI 512010: 90th percentile AQI 672011: 90th percentile AQI 672012: 90th percentile AQI 1012013: 90th percentile AQI 582014: 90th percentile AQI 542015: 90th percentile AQI 542016: 90th percentile AQI 582017: 90th percentile AQI 502018: 90th percentile AQI 542019: 90th percentile AQI 502020: 90th percentile AQI 472021: 90th percentile AQI 482022: 90th percentile AQI 542023: 90th percentile AQI 672024: 90th percentile AQI 502025: 90th percentile AQI 511981: Median AQI 401982: Median AQI 421983: Median AQI 801984: Median AQI 441985: Median AQI 461986: Median AQI 491987: Median AQI 541988: Median AQI 641989: Median AQI 471990: Median AQI 441991: Median AQI 441992: Median AQI 451993: Median AQI 441994: Median AQI 461995: Median AQI 461996: Median AQI 441997: Median AQI 441998: Median AQI 581999: Median AQI 672000: Median AQI 502001: Median AQI 482002: Median AQI 452003: Median AQI 482004: Median AQI 442005: Median AQI 462006: Median AQI 432007: Median AQI 472008: Median AQI 422009: Median AQI 392010: Median AQI 432011: Median AQI 432012: Median AQI 462013: Median AQI 412014: Median AQI 412015: Median AQI 402016: Median AQI 392017: Median AQI 402018: Median AQI 392019: Median AQI 412020: Median AQI 372021: Median AQI 392022: Median AQI 412023: Median AQI 422024: Median AQI 422025: Median AQI 401981198619911996200120062011201620212025
  • 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
Ozone228100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025228202260000405193Ozone
2024243220230000425090Ozone
20232381894450004267126Ozone
20222432073420004154119Ozone
2021243225180000394893Ozone
20202482351210003747105Ozone
2019261237240000415077Ozone
2018257226310000395497Ozone
2017259234250000405093Ozone
20162602213810003958115Ozone
20152602273210004054105Ozone
2014256222340000415497Ozone
20132412033710004158108Ozone
2012242149682140046101197Ozone
20112311676040004367122Ozone
20102451885610004367108Ozone
20092452182610003951129Ozone
2008245199460000426197Ozone
200724014580150004793140Ozone
20062431756440004374136Ozone
200523514772151004687154Ozone
20042441826020004467122Ozone
200324113982191004897154Ozone
20022491555528110045126177Ozone
2001265147892630048101154Ozone
2000255133903020050108182Ozone
1999234948238182067143206Ozone
19982401087643112058136206Ozone
199723816649149004497192Ozone
199623516157143004493166Ozone
1995238136742350046112166Ozone
1994232141681751046100204Ozone
199323214965143104490201Ozone
199223915368180004593147Ozone
1991204121582320044112172Ozone
1990174112422000044101147Ozone
1989215133621910047100151Ozone
19882181005345182064143219Ozone
1987236106794290054136187Ozone
1986222118702770049122200Ozone
1985206121632020046101159Ozone
1984189123471720044101177Ozone
1983181596144170080150200Ozone
198227218866153004290156Ozone
1981222154382460040112185Ozone

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 1981–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem