Bad Air Days in Edmonson County, Kentucky: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 847 of 996 monitored counties, where 1 is worst.

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

The bad-air season here

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.

The record for Edmonson

In 2000 to 2009 this county averaged 13 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2023, with 4 bad days on 363 monitored days.

Date	AQI	Main pollutant
2023-06-10	115	Ozone
2023-06-05	112	Ozone
2023-06-06	112	Ozone
2023-06-15	101	Ozone
2018-08-15	100	PM2.5

An ordinary day in Edmonson

Across 3,608 monitored days from 2016 to 2025, the air in Edmonson County rated Good on 82% of them, more often than the 72% typical of monitored counties, and Moderate on 18%. The median day sat at AQI 39; one day in ten went above 53.

The pollutant setting the AQI on an ordinary day here:

ozone73%2,620 days
fine particles (PM2.5)27%967 days
carbon monoxide1%21 days

Edmonson County by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	356	328	28	0	0	36	77
2024	364	329	35	0	0	38	77
2023	363	319	40	4	0	39	115
2022	365	334	31	0	0	37	84
2021	364	327	37	0	0	36	74
2020	365	350	15	0	0	33	64
2019	365	225	140	0	0	46	77
2018	365	234	131	0	0	43	100
2017	365	218	147	0	0	47	87
2016	336	296	40	0	0	37	97
2015	365	321	44	0	0	37	90
2014	364	294	70	0	0	39	90
2013	364	306	57	1	0	39	105
2012	366	265	87	14	1	43	161
2011	363	252	107	4	0	44	108
2010	364	240	118	6	0	44	126

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

Elsewhere in Kentucky

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.