Bad Air Days in Livingston County, Kentucky: 1 a Year

1 bad air day a year

Fewer bad air days than most monitored US counties. Ranked 616 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly ozone: summer smog (0% particle days).

Which months to watch

Most bad days here fall in June. Averaged over 2016 to 2025.

What actually helps here

Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
On the odd bad day, check AirNow and keep windows shut.

Better or worse than it was

In 2000 to 2009 this county averaged 23 bad days a year; in 2016 to 2025, 1. The air has improved. The worst recent year was 2023, with 5 bad days on 238 monitored days.

Date	AQI	Main pollutant
2023-06-10	126	Ozone
2022-07-22	119	Ozone
2016-06-11	115	Ozone
2023-06-05	108	Ozone
2020-06-02	105	Ozone

Most days, not the worst ones

Across 2,480 monitored days from 2016 to 2025, the air in Livingston County rated Good on 89% of them, more often than the 72% typical of monitored counties, and Moderate on 11%. The median day sat at AQI 40; one day in ten went above 53.

The pollutant setting the AQI on an ordinary day here:

ozone97%2,395 days
coarse dust (PM10)3%85 days

Livingston County by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	228	202	26	0	0	40	93
2024	243	220	23	0	0	42	90
2023	238	189	44	5	0	42	126
2022	243	207	34	2	0	41	119
2021	243	225	18	0	0	39	93
2020	248	235	12	1	0	37	105
2019	261	237	24	0	0	41	77
2018	257	226	31	0	0	39	97
2017	259	234	25	0	0	40	93
2016	260	221	38	1	0	39	115
2015	260	227	32	1	0	40	105
2014	256	222	34	0	0	41	97
2013	241	203	37	1	0	41	108
2012	242	149	68	25	4	46	197
2011	231	167	60	4	0	43	122
2010	245	188	56	1	0	43	108

*2025 may be a partial year in EPA's file.

Kentucky compared

How this is counted

A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day, and on why a purifier does not touch ozone in smoke vs ozone.