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RankingsLouisianaWorst air quality

Counties with the Worst Air Quality in Louisiana

The top 22 of 22 Louisiana counties on GIS Map, ranked by median Air Quality Index, counting only counties that host an EPA air monitor.

#CountyMedian AQI
1East Baton Rouge Parish
51
2Lafayette Parish
51
3Calcasieu Parish
49
4West Baton Rouge Parish
49
5Lafourche Parish
48
6Bossier Parish
47
7Tangipahoa Parish
47
8Jefferson Parish
46
9St. Bernard Parish
45
10Livingston Parish
44
11Caddo Parish
41
12Iberville Parish
41
13Orleans Parish
41
14Ouachita Parish
41
15Rapides Parish
39
16St. Tammany Parish
39
17Terrebonne Parish
39
18St. Martin Parish
38
19Pointe Coupee Parish
36
20St. John the Baptist Parish
36
21Ascension Parish
33
22St. James Parish
32

Source: EPA Air Quality Index annual summary (2024). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties with the Worst Air Quality in Louisiana”, https://gismap.land/rankings/louisiana/worst-air-quality-counties. Figures from EPA Air Quality Index annual summary (2024).

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