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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · Louisiana

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318 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

318 results

CompareNameNative sizeYear
NEW ORLEANS EAST BANKNew Orleans122 MGD (million gallons per day)2022
EAST BANK PLANTNew Orleans33.46 MGD (million gallons per day)2022
SHREVEPORT, LUCAS WWTPShreveport31.25 MGD (million gallons per day)2022
BATON ROUGE SOUTH WWTPBaton Rouge30 MGD (million gallons per day)2022
Alexandria WWTPAlexandria22 MGD (million gallons per day)2022
NEW ORLEANS W. BANK STPNew Orleans20 MGD (million gallons per day)2022
MONROE WATER POLL CONTROL CENTERMonroe18 MGD (million gallons per day)2022
HOUMA N REG TRTMT PLTHouma16 MGD (million gallons per day)2022
BATON ROUGE NORTH WWTPBaton Rouge15 MGD (million gallons per day)2022
HARVEY PLANTHarvey13.7 MGD (million gallons per day)2022
KENNER STP 3Kenner13.55 MGD (million gallons per day)2022
BATON ROUGE CENTRAL WWTPBaton Rouge12 MGD (million gallons per day)2022
MARRERO PLANTMarrero9.6 MGD (million gallons per day)2022
RED RIVER TREAT PLTBossier City8.9 MGD (million gallons per day)2022
HAMMOND NORTH STPHammond8 MGD (million gallons per day)2022
HOUMA S REG TRTMT PLTHouma8 MGD (million gallons per day)2022
THIBODAUX WWTPThibodaux8 MGD (million gallons per day)2022
BRIDGE CITY OLD PLANTWestwego7.23 MGD (million gallons per day)2022
LAFAYETTE - SOUTH SEWAGE PLANTLafayette7 MGD (million gallons per day)2022
Shreveport North Regional WWTPShreveport7 MGD (million gallons per day)2022
LAKE CHARLES PLANT ALake Charles6.7 MGD (million gallons per day)2022
RUSTON NORTH PLANTRuston6.52 MGD (million gallons per day)2022
Lake Charles Plant B/CLake Charles6.2 MGD (million gallons per day)2022
DestrehanDestrehan6 MGD (million gallons per day)2022
AMBASSADOR CAFFERY STPLafayette6 MGD (million gallons per day)2022
NEW IBERIA STPNew Iberia6 MGD (million gallons per day)2022
TERRACE AVE PLANTSlidell6 MGD (million gallons per day)2022
NORTHEAST WWTPBossier City5.4 MGD (million gallons per day)2022
GRETNA STPGretna5 MGD (million gallons per day)2022
Lake Charles Plant DLake Charles4.95 MGD (million gallons per day)2022
CITY OF SULFUR SOUTH REGIONAL STPSulphur4.9 MGD (million gallons per day)2022
MORGAN CITY SD #1 WWCTSMorgan City4.5 MGD (million gallons per day)2022
ST. CHARLES EAST BANK STPDestrehan4.4 MGD (million gallons per day)2022
LAFAYETTE - EAST SEWAGE PLANTLafayette4 MGD (million gallons per day)2022
TETE BAYOU STPNew Iberia3.5 MGD (million gallons per day)2022
WARDS 5&8 REG WWCTSBerwick3.5 MGD (million gallons per day)2022
DRAVO TREATMENT PLANTChalmette3.5 MGD (million gallons per day)2022
OPELOUSAS STPOpelousas3.4 MGD (million gallons per day)2022
NATCHITOCHES STPNatchitoches3.3 MGD (million gallons per day)2022
DERIDDER WWTFDeridder3.03 MGD (million gallons per day)2022
St. John the Baptist - Reserve WWTPReserve3 MGD (million gallons per day)2022
PINEVILLE STPPineville3 MGD (million gallons per day)2022
WEST MONROE REG STPWest Monroe3 MGD (million gallons per day)2022
WESTWEGO STPWestwego3 MGD (million gallons per day)2022
DENHAM SPRINGS WWTPDenham Springs3 MGD (million gallons per day)2022
BELLE CHASSE HWY 23 WWTPBelle Chasse3 MGD (million gallons per day)2022
ABBEVILLE STPAbbeville2.6 MGD (million gallons per day)2022
EUNICE STPEunice2.5 MGD (million gallons per day)2022
JENNINGS STPJennings2.5 MGD (million gallons per day)2022
TRIUMPH-BURAS STPBuras2.5 MGD (million gallons per day)2022
GONZALES WWTPGonzales2.5 MGD (million gallons per day)2022
CROWLEY STPCrowley2.47 MGD (million gallons per day)2022
Hahnville Wastewater Treatment PlantHahnville2.3 MGD (million gallons per day)2022
LULING STPLuling2.2 MGD (million gallons per day)2022
MUNSTER WWTPChalmette2.2 MGD (million gallons per day)2022
BOGALUSA STPBogalusa2.1 MGD (million gallons per day)2022
LEESVILLE STPLeesville2.08 MGD (million gallons per day)2022
DELHI SEWERAGE SYSTEMDelhi2 MGD (million gallons per day)2022
MANDEVILLE STPMandeville2 MGD (million gallons per day)2022
PLAQUEMINE SOUTH STPPlaquemine2 MGD (million gallons per day)2022
MARKSVILLE LAGOON (WWTP)Marksville2 MGD (million gallons per day)2022
VILLE PLATTE STPVille Platte2 MGD (million gallons per day)2022
YOUNGSVILLE STPYoungsville1.8 MGD (million gallons per day)2022
Covington CityCovington1.75 MGD (million gallons per day)2022
ST CHARLES WEST BK STPHahnville1.7 MGD (million gallons per day)2022
FRANKLIN WEST REG WCTSFranklin1.6 MGD (million gallons per day)2022
HARAHAN STPNew Orleans1.6 MGD (million gallons per day)2022
FERRIDAY NORTH PONDFerriday1.6 MGD (million gallons per day)2022
Arrow Wood STPCovington1.6 MGD (million gallons per day)2022
GRAMBLING STPGrambling1.5 MGD (million gallons per day)2022
LAFAYETTE - NORTHEAST OXID PONDLafayette1.5 MGD (million gallons per day)2022
RAYVILLE STPRayville1.5 MGD (million gallons per day)2022
SPRINGHILL, TOWN OFSpringhill1.5 MGD (million gallons per day)2022
WALKER STPWalker1.5 MGD (million gallons per day)2022
RAYNE STPRayne1.5 MGD (million gallons per day)2022
ST. MARTINVILLE STPSaint Martinville1.5 MGD (million gallons per day)2022
OAKDALE WWT FACILITYOakdale1.46 MGD (million gallons per day)2022
WINNFIELD STPWinnfield1.46 MGD (million gallons per day)2022
JENA SEWERAGE SYSTEMJena1.4 MGD (million gallons per day)2022
PONCHATOULA PONDPonchatoula1.4 MGD (million gallons per day)2022
JEANERETTE STPJeanerette1.33 MGD (million gallons per day)2022
Lakeshore Subdivision SD #1Monroe1.3 MGD (million gallons per day)2022
AMITE CITY STPAmite1.3 MGD (million gallons per day)2022
West St. Tammany Parish WWTP ConsolidationMadisonville1.25 MGD (million gallons per day)2022
DONALDSONVILLE STPDonaldsonville1.25 MGD (million gallons per day)2022
WINNSBORO STPWinnsboro1.2 MGD (million gallons per day)2022
TALLULAH/RICHMOND STPTallulah1.2 MGD (million gallons per day)2022
BUNKIE STPBunkie1 MGD (million gallons per day)2022
MINDEN TREATMENT PLANTMinden1 MGD (million gallons per day)2022
PORT SULPHUR STPPort Sulphur1 MGD (million gallons per day)2022
PORT ALLEN STPPort Allen1 MGD (million gallons per day)2022
FAZENDVILLE PLANTChalmette1 MGD (million gallons per day)2022
VINTON SEWERAGE SYSTEMVinton0.92 MGD (million gallons per day)2022
St. Tammany Regional WWTPSlidell0.9 MGD (million gallons per day)2022
ARCADIA SEWERAGE SYSTEMArcadia0.85 MGD (million gallons per day)2022
LAKE PROVIDENCE N. PONDLake Providence0.85 MGD (million gallons per day)2022
GRAMERCY STPGramercy0.85 MGD (million gallons per day)2022
CHURCH POINT STPChurch Point0.8 MGD (million gallons per day)2022
VIDALIA MAIN PONDVidalia0.8 MGD (million gallons per day)2022
ZWOLLE STPZwolle0.8 MGD (million gallons per day)2022

Regulatory context

General reference. This is not an exhaustive review of applicable law.

United States: Clean Water Act / NPDES

NPDES regulates pollutant discharges from point sources to waters of the United States. The permit sets limits and monitoring conditions. A CWNS code identifies an inventory record, not an NPDES permit.

  • Permit identifier and permitting authority: EPA or an authorized state.
  • Outfall and receiving water; sewer connections follow a different control route.
  • Current permit conditions, limits and dated measurements; these are not included in CWNS.

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.