Louisiana(LA)
Air quality overview and monitoring data — 2025
186
Monitoring Sites
10,204
Active Monitors
37
Counties with Data
52
Cities Monitored
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County Air Quality
| County | Median AQI ▲ | 90th %ile | Max AQI | Good | Moderate | USG | Unhealthy |
|---|---|---|---|---|---|---|---|
| Ascension | 33 | 48 | 108 | 256 | 15 | 1 | 0 |
| St. James | 34 | 49 | 84 | 247 | 20 | 0 | 0 |
| Pointe Coupee | 35 | 49 | 93 | 253 | 20 | 0 | 0 |
| Rapides | 35 | 53 | 67 | 45 | 12 | 0 | 0 |
| St. John the Baptist | 35 | 49 | 87 | 251 | 22 | 0 | 0 |
| St. Martin | 36 | 50 | 77 | 249 | 22 | 0 | 0 |
| Caddo | 38 | 54 | 80 | 226 | 42 | 0 | 0 |
| St. Tammany | 38 | 58 | 105 | 230 | 40 | 1 | 0 |
| Tangipahoa | 38 | 53 | 63 | 51 | 11 | 0 | 0 |
| Terrebonne | 39 | 57 | 66 | 47 | 14 | 0 | 0 |
| Bossier | 40 | 54 | 101 | 236 | 36 | 1 | 0 |
| Iberville | 41 | 61 | 105 | 214 | 58 | 1 | 0 |
| Orleans | 44 | 56 | 71 | 182 | 92 | 0 | 0 |
| Livingston | 45 | 59 | 84 | 168 | 103 | 0 | 0 |
| St. Bernard | 45 | 59 | 93 | 190 | 83 | 0 | 0 |
| Lafourche | 46 | 58 | 77 | 169 | 104 | 0 | 0 |
| Ouachita | 46 | 58 | 71 | 166 | 106 | 0 | 0 |
| Calcasieu | 47 | 61 | 108 | 168 | 103 | 2 | 0 |
| Lafayette | 47 | 61 | 79 | 166 | 104 | 0 | 0 |
| Jefferson | 48 | 64 | 101 | 160 | 112 | 1 | 0 |
| West Baton Rouge | 50 | 61 | 112 | 138 | 134 | 1 | 0 |
| East Baton Rouge | 51 | 63 | 115 | 135 | 138 | 1 | 0 |
Pollutant Trends
Ozone
No data available
PM2.5
No data available
PM10
No data available
CO
No data available
NO2
No data available
SO2
No data available