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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
MOREAUVILLE STPMoreauville0.16 MGD (million gallons per day)2022
MORGANZA PONDMorganza0.16 MGD (million gallons per day)2022
Lukeville WWTPPort Allen0.16 MGD (million gallons per day)2022
Pellon St. WWTPPineville0.15 MGD (million gallons per day)2022
GILBERT STPGilbert0.15 MGD (million gallons per day)2022
MORSE WWCTSMorse0.15 MGD (million gallons per day)2022
GIBSLAND STPGibsland0.15 MGD (million gallons per day)2022
ALBANY STPAlbany0.15 MGD (million gallons per day)2022
CAMPTI STPCampti0.15 MGD (million gallons per day)2022
KROTZ SPRINGS STPKrotz Springs0.15 MGD (million gallons per day)2022
WASHINGTON STPWashington0.15 MGD (million gallons per day)2022
Tangipahoa Parish GovernmentHammond0.15 MGD (million gallons per day)2022
WATERPROOF WWTPWaterproof0.15 MGD (million gallons per day)2022
ST. BERNARD, HEIGHTS DR. WWTPSaint Bernard0.15 MGD (million gallons per day)2022
LOREAUVILLE STPLoreauville0.14 MGD (million gallons per day)2022
DUBACH SOUTH STPDubach0.14 MGD (million gallons per day)2022
S E LA STATE HOSP W T FMandeville0.14 MGD (million gallons per day)2022
SICILY ISLAND STPSicily Island0.135 MGD (million gallons per day)2022
RINGGOLD SOUTH PLANTRinggold0.13 MGD (million gallons per day)2022
CLAYTON LAGOONClayton0.13 MGD (million gallons per day)2022
SIBLEY LAGOONSibley0.13 MGD (million gallons per day)2022
HARRISONBURG STPHarrisonburg0.125 MGD (million gallons per day)2022
MOORINGSPORT STPMooringsport0.12 MGD (million gallons per day)2022
MARINGOUIN STPMaringouin0.12 MGD (million gallons per day)2022
MARION LAGOONMarion0.12 MGD (million gallons per day)2022
MERRYVILLE STPMerryville0.11 MGD (million gallons per day)2022
GREENSBURG PONDGreensburg0.11 MGD (million gallons per day)2022
DOYLINE LAGOONDoyline0.11 MGD (million gallons per day)2022
Deerfield WWTPAlexandria0.1 MGD (million gallons per day)2022
Kellyland Treatment PlantAlexandria0.1 MGD (million gallons per day)2022
North Monroe Subdivision Sewer District #1Monroe0.1 MGD (million gallons per day)2022
FOREST HILL STPForest Hill0.1 MGD (million gallons per day)2022
LECOMPTE STPLecompte0.1 MGD (million gallons per day)2022
SPRINGFIELD STPSpringfield0.1 MGD (million gallons per day)2022
ESTHERWOOD STPEstherwood0.1 MGD (million gallons per day)2022
Village of MermentauMermentau0.1 MGD (million gallons per day)2022
SORRENTO STPSorrento0.1 MGD (million gallons per day)2022
PINE PRAIRIE PONDSPine Prairie0.1 MGD (million gallons per day)2022
SIMSBORO STPSimsboro0.1 MGD (million gallons per day)2022
PLEASANT HILL STPPleasant Hill0.1 MGD (million gallons per day)2022
PARKS WWCTSSaint Martinville0.1 MGD (million gallons per day)2022
MAURICE WWTPMaurice0.1 MGD (million gallons per day)2022
COTTON VALLEY STPCotton Valley0.1 MGD (million gallons per day)2022
WISNER LAGOONWisner0.095 MGD (million gallons per day)2022
MANGHAM PONDMangham0.095 MGD (million gallons per day)2022
POLLOCK STPPollock0.09 MGD (million gallons per day)2022
MADISONVILLE STPMadisonville0.08 MGD (million gallons per day)2022
CHATHAM PONDChatham0.08 MGD (million gallons per day)2022
GOLDEN MEADOW STPGolden Meadow0.08 MGD (million gallons per day)2022
CONVERSE LAGOONConverse0.08 MGD (million gallons per day)2022
TANGIPAHOA PONDTangipahoa0.076 MGD (million gallons per day)2022
HESSMER LAGOONSHessmer0.075 MGD (million gallons per day)2022
PROVENCAL WWCTSProvencal0.075 MGD (million gallons per day)2022
HARDWOOD COLLECTION SYS.Saint Francisville0.075 MGD (million gallons per day)2022
KILBOURNE LAGOONKilbourne0.073 MGD (million gallons per day)2022
DOWNSVILLE STPDownsville0.07 MGD (million gallons per day)2022
DODSON LAGOONDodson0.07 MGD (million gallons per day)2022
REDDELL PONDMamou0.068 MGD (million gallons per day)2022
NATCHEZ WWCTSNatchez0.068 MGD (million gallons per day)2022
E. COLUMBIA SD #1Columbia0.06 MGD (million gallons per day)2022
EAST HODGE STPHodge0.06 MGD (million gallons per day)2022
DELTA STPDelta0.06 MGD (million gallons per day)2022
CLARENCE WWCTSClarence0.06 MGD (million gallons per day)2022
DIXIE INN STPMinden0.06 MGD (million gallons per day)2022
PENNY ACRES SUBDIVISIONAlexandria0.06 MGD (million gallons per day)2022
Bossier Parish SD #1Benton0.06 MGD (million gallons per day)2022
RODESSA STPRodessa0.058 MGD (million gallons per day)2022
GEORGETOWN STPGeorgetown0.052 MGD (million gallons per day)2022
COLUMBIA SEWERAGE SYSTEMColumbia0.05 MGD (million gallons per day)2022
FOLSOM STPFolsom0.05 MGD (million gallons per day)2022
NORTH HODGE STPHodge0.05 MGD (million gallons per day)2022
ELIZABETH STPElizabeth0.05 MGD (million gallons per day)2022
ATHENS STPAthens0.05 MGD (million gallons per day)2022
GRAND CANE STPGrand Cane0.05 MGD (million gallons per day)2022
Village of WilsonWilson0.05 MGD (million gallons per day)2022
TURKEY CREEK STPTurkey Creek0.05 MGD (million gallons per day)2022
CHATAIGNIER PONDChataignier0.05 MGD (million gallons per day)2022
GROSSE TETE STPGrosse Tete0.05 MGD (million gallons per day)2022
FENTON WWSSFenton0.05 MGD (million gallons per day)2022
CHOUDRANT STPChoudrant0.05 MGD (million gallons per day)2022
BONITA STPBonita0.05 MGD (million gallons per day)2022
HALL SUMMIT LAGOONHall Summit0.05 MGD (million gallons per day)2022
HORNBECK WWCTSHornbeck0.05 MGD (million gallons per day)2022
LEWISTOWN PONDRaceland0.045 MGD (million gallons per day)2022
SALINE STPSaline0.04 MGD (million gallons per day)2022
NORWOOD LAGOONNorwood0.04 MGD (million gallons per day)2022
DRY PRONG WWTPDry Prong0.04 MGD (million gallons per day)2022
QUITMAN STPThibodaux0.04 MGD (million gallons per day)2022
JONATAN DAVIS STPBarataria0.04 MGD (million gallons per day)2022
ROBELINE WWCTSRobeline0.04 MGD (million gallons per day)2022
CALVIN LAGOONCalvin0.04 MGD (million gallons per day)2022
Harmony Hills WWTPPineville0.04 MGD (million gallons per day)2022
EVERGREEN WWTPEvergreen0.037 MGD (million gallons per day)2022
Mandela WWTPNew Roads0.035 MGD (million gallons per day)2022
COLLINSTON STPCollinston0.032 MGD (million gallons per day)2022
PARISH SD 6 PONDSpringfield0.032 MGD (million gallons per day)2022
Peterville WWTPPaincourtville0.03 MGD (million gallons per day)2022
CASTOR STPCastor0.03 MGD (million gallons per day)2022
EVANGELINE PAR. IND. PONDVille Platte0.03 MGD (million gallons per day)2022
EROS STPEros0.03 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.