Bad Air Days in Jackson County, Mississippi: under 1 a Year
under 1 bad air day a year
Fewer bad air days than most monitored US counties. Ranked 749 of 996 monitored counties, where 1 is worst.
What makes them bad: mostly ozone: summer smog (0% particle days).
Which months to watch
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Most bad days here fall in May and June and March and August. 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 Jackson
In 2000 to 2009 this county averaged 20 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2018, with 2 bad days on 362 monitored days.
| Date | AQI | Main pollutant |
|---|---|---|
| 2023-06-10 | 108 | Ozone |
| 2018-05-09 | 105 | Ozone |
| 2019-08-16 | 105 | Ozone |
| 2017-05-08 | 101 | Ozone |
| 2018-05-17 | 101 | Ozone |
Most days, not the worst ones
Across 3,594 monitored days from 2016 to 2025, the air in Jackson County rated Good on 66% of them, less often than the 72% typical of monitored counties, and Moderate on 33%. The median day sat at AQI 44; one day in ten went above 60.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)62%2,237 days
- ozone34%1,215 days
- nitrogen dioxide4%142 days
Jackson County by year
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2025* | 365 | 255 | 110 | 0 | 0 | 44 | 93 |
| 2024 | 363 | 236 | 127 | 0 | 0 | 44 | 97 |
| 2023 | 364 | 176 | 186 | 2 | 0 | 51 | 108 |
| 2022 | 365 | 243 | 121 | 1 | 0 | 44 | 101 |
| 2021 | 359 | 242 | 117 | 0 | 0 | 44 | 84 |
| 2020 | 356 | 204 | 152 | 0 | 0 | 47 | 84 |
| 2019 | 365 | 232 | 132 | 1 | 0 | 46 | 105 |
| 2018 | 362 | 219 | 141 | 2 | 0 | 47 | 105 |
| 2017 | 355 | 294 | 60 | 1 | 0 | 34 | 101 |
| 2016 | 340 | 288 | 52 | 0 | 0 | 39 | 93 |
| 2015 | 363 | 291 | 72 | 0 | 0 | 36 | 93 |
| 2014 | 361 | 322 | 31 | 8 | 0 | 32 | 122 |
| 2013 | 356 | 328 | 27 | 1 | 0 | 31 | 105 |
| 2012 | 361 | 305 | 48 | 8 | 0 | 33 | 119 |
| 2011 | 364 | 259 | 99 | 6 | 0 | 39 | 115 |
| 2010 | 364 | 264 | 92 | 8 | 0 | 41 | 140 |
*2025 may be a partial year in EPA's file.
Nearby counties on file
- DeSoto County2/yr
- Harrison County1/yr
- Hinds Countyunder 1/yr
- Bolivar Countyunder 1/yr
- Forrest Countyunder 1/yr
- Lee Countyunder 1/yr
- Hancock Countyunder 1/yr
- Yalobusha Countyunder 1/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, and on why a purifier does not touch ozone in smoke vs ozone.