Bad Air Days in Madison County, Kentucky
Not enough data
EPA monitors in Madison County ran on too few days between 2016 and 2025 to give a fair yearly count (about 29% of days covered). Neighbouring counties below are a better guide.
What to buy, and what not to
- EPA monitors here ran too few days to give a fair yearly count. Use AirNow for today's air.
The record for Madison
| Date | AQI | Main pollutant |
|---|---|---|
| 2016-11-08 | 91 | PM2.5 |
| 2016-09-25 | 74 | PM2.5 |
| 2017-07-21 | 73 | PM2.5 |
| 2016-11-14 | 72 | PM2.5 |
| 2017-11-30 | 69 | PM2.5 |
The air on a normal day
Across 210 monitored days from 2016 to 2017, the air in Madison County rated Good on 72% of them, close to the 72% typical of monitored counties, and Moderate on 28%. The median day sat at AQI 39; one day in ten went above 56.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)100%210 days
Madison County by year
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2017 | 113 | 84 | 29 | 0 | 0 | 39 | 73 |
| 2016 | 97 | 68 | 29 | 0 | 0 | 39 | 91 |
| 2015 | 112 | 80 | 32 | 0 | 0 | 39 | 74 |
| 2014 | 110 | 66 | 44 | 0 | 0 | 44 | 76 |
| 2013 | 114 | 74 | 40 | 0 | 0 | 44 | 72 |
| 2012 | 119 | 64 | 55 | 0 | 0 | 43 | 71 |
| 2011 | 117 | 67 | 50 | 0 | 0 | 47 | 77 |
| 2010 | 115 | 40 | 75 | 0 | 0 | 53 | 85 |
Kentucky compared
- Jefferson County9/yr
- Oldham County3/yr
- Henderson County2/yr
- Campbell County2/yr
- Boone County2/yr
- Bullitt County2/yr
- McCracken County2/yr
- Daviess County2/yr
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.