Skip to main content
AirHistory

Air Quality in Louisiana

10-year air quality trends for 22 monitored areas in Louisiana.

See full Louisiana air quality rankings →
22
Cities
41
Avg AQI (5yr)
11
Improving
5
Stable
6
Worsening

All Monitored Areas in Louisiana

Orleans, Louisiana

Orleans County · AQI 36 (5yr avg) · Improving · PM2.5

B

Ascension, Louisiana

Ascension County · AQI 32 (5yr avg) · Stable · Ozone

B

Rapides, Louisiana

Rapides County · AQI 39 (5yr avg) · Improving · PM2.5

B

St. James, Louisiana

St. James County · AQI 30 (5yr avg) · Stable · Ozone

B

St. Martin, Louisiana

St. Martin County · AQI 34 (5yr avg) · Improving · Ozone

B

Ouachita, Louisiana

Ouachita County · AQI 36 (5yr avg) · Improving · Ozone

B

St. John the Baptist, Louisiana

St. John the Baptist County · AQI 33 (5yr avg) · Stable · Ozone

B

St. Tammany, Louisiana

St. Tammany County · AQI 40 (5yr avg) · Improving · PM2.5

B

Caddo, Louisiana

Caddo County · AQI 38 (5yr avg) · Stable · Ozone

B

Lafayette, Louisiana

Lafayette County · AQI 45 (5yr avg) · Improving · PM2.5

B

Pointe Coupee, Louisiana

Pointe Coupee County · AQI 33 (5yr avg) · Stable · Ozone

B

East Baton Rouge, Louisiana

East Baton Rouge County · AQI 48 (5yr avg) · Improving · PM2.5

B

Tangipahoa, Louisiana

Tangipahoa County · AQI 39 (5yr avg) · Stable · PM2.5

B

St. Bernard, Louisiana

St. Bernard County · AQI 48 (5yr avg) · Stable · PM2.5

C

Terrebonne, Louisiana

Terrebonne County · AQI 38 (5yr avg) · Worsening · PM2.5

C

Jefferson, Louisiana

Jefferson County · AQI 44 (5yr avg) · Stable · PM2.5

C

Livingston, Louisiana

Livingston County · AQI 50 (5yr avg) · Stable · PM2.5

C

West Baton Rouge, Louisiana

West Baton Rouge County · AQI 47 (5yr avg) · Stable · PM2.5

C

Iberville, Louisiana

Iberville County · AQI 40 (5yr avg) · Worsening · Ozone

C

Bossier, Louisiana

Bossier County · AQI 47 (5yr avg) · Worsening · PM2.5

C

Calcasieu, Louisiana

Calcasieu County · AQI 52 (5yr avg) · Stable · PM2.5

C

Lafourche, Louisiana

Lafourche County · AQI 48 (5yr avg) · Worsening · PM2.5

C
Cleanest Air Cities in America →Worst Air Quality Cities →Fastest-Improving Cities →Compare Any Two Cities →

Frequently Asked Questions

Louisiana has 22 monitored areas with an average 5-year AQI of 41 and an average Air Quality Grade of B. 11 cities are improving, 6 are worsening, and 5 are stable.

Orleans, Louisiana has the best Air Quality Grade (B) in Louisiana with a 5-year average AQI of 36.

Of 22 monitored areas in Louisiana, 11 are showing improving trends, 6 are worsening, and 5 remain stable over the past decade.

Sources: EPA Air Quality System (AQS)
Last updated: