Bad Air Days in Bossier Parish, Louisiana: under 1 a Year
under 1 bad air day a year
Rare: among the cleanest-air counties EPA monitors. Ranked 786 of 996 monitored counties, where 1 is worst.
What makes them bad: mostly particles: smoke and dust (67% particle days).
The bad-air season here
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Most bad days here fall in June and August and February and July. Averaged over 2016 to 2025.
What to buy, and what not to
- 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 Bossier
In 2000 to 2009 this county averaged 15 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2024, with 3 bad days on 364 monitored days.
| Date | AQI | Main pollutant |
|---|---|---|
| 2023-02-27 | 114 | PM10 |
| 2024-08-01 | 111 | PM2.5 |
| 2024-07-31 | 106 | PM2.5 |
| 2020-06-26 | 105 | PM2.5 |
| 2024-06-14 | 101 | Ozone |
An ordinary day in Bossier
Across 3,626 monitored days from 2016 to 2025, the air in Bossier Parish rated Good on 63% of them, less often than the 72% typical of monitored counties, and Moderate on 37%. The median day sat at AQI 45; one day in ten went above 61.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)59%2,130 days
- ozone40%1,441 days
- coarse dust (PM10)2%55 days
Bossier Parish by year
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2025* | 365 | 288 | 76 | 1 | 0 | 42 | 101 |
| 2024 | 364 | 209 | 152 | 3 | 0 | 47 | 111 |
| 2023 | 360 | 148 | 211 | 1 | 0 | 53 | 114 |
| 2022 | 358 | 162 | 196 | 0 | 0 | 52 | 99 |
| 2021 | 365 | 172 | 193 | 0 | 0 | 51 | 88 |
| 2020 | 362 | 269 | 92 | 1 | 0 | 40 | 105 |
| 2019 | 357 | 282 | 75 | 0 | 0 | 37 | 86 |
| 2018 | 365 | 280 | 85 | 0 | 0 | 38 | 96 |
| 2017 | 364 | 256 | 108 | 0 | 0 | 42 | 100 |
| 2016 | 366 | 226 | 140 | 0 | 0 | 44 | 90 |
| 2015 | 364 | 206 | 157 | 1 | 0 | 46 | 140 |
| 2014 | 364 | 177 | 186 | 1 | 0 | 51 | 112 |
| 2013 | 365 | 195 | 167 | 3 | 0 | 49 | 119 |
| 2012 | 365 | 198 | 163 | 4 | 0 | 48 | 140 |
| 2011 | 365 | 170 | 167 | 28 | 4 | 52 | 159 |
| 2010 | 364 | 167 | 182 | 15 | 2 | 52 | 161 |
*2025 may be a partial year in EPA's file.
Louisiana 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.