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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 LLANO SEWERAGE FACILINewllano0.75 MGD (million gallons per day)2022
SCOTT STPScott0.75 MGD (million gallons per day)2022
MANSFIELD STPMansfield0.75 MGD (million gallons per day)2022
LAKE ARTHUR WWSSLake Arthur0.75 MGD (million gallons per day)2022
BALL STPBall0.75 MGD (million gallons per day)2022
MANY STPMany0.75 MGD (million gallons per day)2022
STATE PENITNETIARY PONDAngola0.75 MGD (million gallons per day)2022
FranklintonFranklinton0.74 MGD (million gallons per day)2022
NEWELLTON PONDNewellton0.72 MGD (million gallons per day)2022
WELSH STPWelsh0.7 MGD (million gallons per day)2022
BREAUX BRIDGE STPBreaux Bridge0.7 MGD (million gallons per day)2022
INDEPENDENCE PONDIndependence0.7 MGD (million gallons per day)2022
KENTWOOD LAGOONKentwood0.7 MGD (million gallons per day)2022
BRUSLY STPBrusly0.7 MGD (million gallons per day)2022
CAMERON STPCameron0.685 MGD (million gallons per day)2022
KAPLAN STPKaplan0.65 MGD (million gallons per day)2022
St. Mary Parish Water & Sewer Commission No. 1Amelia0.6 MGD (million gallons per day)2022
LUTCHER SEW SYSLutcher0.6 MGD (million gallons per day)2022
VIVIAN STPVivian0.6 MGD (million gallons per day)2022
MANSURA WWTPMansura0.6 MGD (million gallons per day)2022
FERRIDAY SOUTHWEST WWTPFerriday0.6 MGD (million gallons per day)2022
Town of RidgecrestFerriday0.6 MGD (million gallons per day)2022
CADDO PARISH SD 7 WWTFShreveport0.6 MGD (million gallons per day)2022
DEQUINCY SEWER SYSTEMDequincy0.56 MGD (million gallons per day)2022
St. Mary Parish Water & Sewer Commission #4Charenton0.5 MGD (million gallons per day)2022
CARENCRO SEW OXY PONDCarencro0.5 MGD (million gallons per day)2022
CARENCRO MANOLO ST PLANTCarencro0.5 MGD (million gallons per day)2022
PEARL RIVER WWTPPearl River0.5 MGD (million gallons per day)2022
PLAIN DEALING STPPlain Dealing0.5 MGD (million gallons per day)2022
HAYNESVILLE STPHaynesville0.5 MGD (million gallons per day)2022
HOMER WWTPHomer0.5 MGD (million gallons per day)2022
LAKE PROVIDENCE S. PONDLake Providence0.5 MGD (million gallons per day)2022
BASILE STPBasile0.5 MGD (million gallons per day)2022
MAMOU STPMamou0.5 MGD (million gallons per day)2022
BOOTHVILLE-VENICE STPBoothville0.5 MGD (million gallons per day)2022
NEW ROADS LAGOONNew Roads0.5 MGD (million gallons per day)2022
BOYCE SEWERAGE FACILITYBoyce0.45 MGD (million gallons per day)2022
GREENWOOD STPGreenwood0.45 MGD (million gallons per day)2022
WEST PONDBastrop0.44 MGD (million gallons per day)2022
JACKSON CSJackson0.439 MGD (million gallons per day)2022
JONESBORO NORTH PONDJonesboro0.41 MGD (million gallons per day)2022
JONESVILLE STPJonesville0.4 MGD (million gallons per day)2022
LOGANSPORT STPLogansport0.4 MGD (million gallons per day)2022
FARMERVILLE STPFarmerville0.4 MGD (million gallons per day)2022
WBR Westport WWTPPort Allen0.4 MGD (million gallons per day)2022
STERLINGTON STPSterlington0.375 MGD (million gallons per day)2022
ARNAUDVILLE WWTPArnaudville0.36 MGD (million gallons per day)2022
COUSHATTA WWTPCoushatta0.36 MGD (million gallons per day)2022
GLENMORA SEWERAGE SYSTEMGlenmora0.35 MGD (million gallons per day)2022
WOODWORTH WWTPWoodworth0.35 MGD (million gallons per day)2022
DELCAMBRE STPDelcambre0.35 MGD (million gallons per day)2022
WHITE CASTLE STPWhite Castle0.35 MGD (million gallons per day)2022
LOCKPORT STPLockport0.35 MGD (million gallons per day)2022
DUSON STPDuson0.34 MGD (million gallons per day)2022
JONESBORO SOUTH PONDJonesboro0.34 MGD (million gallons per day)2022
Town of EltonElton0.333 MGD (million gallons per day)2022
ABITA SPRINGS STPAbita Springs0.33 MGD (million gallons per day)2022
IOWA SEWERAGE SYSTEMIowa0.33 MGD (million gallons per day)2022
Northwest WWTPHammond0.3 MGD (million gallons per day)2022
ADDIS STPAddis0.3 MGD (million gallons per day)2022
ST FRANCISVILLE WWTPSaint Francisville0.3 MGD (million gallons per day)2022
KINDERKinder0.3 MGD (million gallons per day)2022
ST. GABRIEL STPSunshine0.3 MGD (million gallons per day)2022
JONESBORO EAST PONDJonesboro0.3 MGD (million gallons per day)2022
POINTE COUPEE SD # 1 LAGOONNew Roads0.3 MGD (million gallons per day)2022
SUNSET LAGOONSunset0.3 MGD (million gallons per day)2022
St. Mary SD #5Centerville0.3 MGD (million gallons per day)2022
BERNICE STPBernice0.3 MGD (million gallons per day)2022
OAK GROVE PONDOak Grove0.3 MGD (million gallons per day)2022
CLINTON WWTPClinton0.28 MGD (million gallons per day)2022
ERATH WWCTSErath0.28 MGD (million gallons per day)2022
URANIA STPUrania0.28 MGD (million gallons per day)2022
OIL CITY STAB PONDOil City0.27 MGD (million gallons per day)2022
MELVILLE STPMelville0.25 MGD (million gallons per day)2022
BROUSSARD SEW OXY PONDBroussard0.24 MGD (million gallons per day)2022
SIMMESPORT STPSimmesport0.24 MGD (million gallons per day)2022
PORT BARRE STPPort Barre0.24 MGD (million gallons per day)2022
BALDWIN EAST WWCTSBaldwin0.24 MGD (million gallons per day)2022
Benton Wastewater SystemBenton0.22 MGD (million gallons per day)2022
HENDERSON WWCTSBreaux Bridge0.22 MGD (million gallons per day)2022
Calcasieu SD # 11Lake Charles0.22 MGD (million gallons per day)2022
Leonville WWTPLeonville0.2 MGD (million gallons per day)2022
CLARKS & GRAYSON STPClarks0.2 MGD (million gallons per day)2022
COTTONPORT WWTFCottonport0.2 MGD (million gallons per day)2022
GUEYDAN STPGueydan0.2 MGD (million gallons per day)2022
MER ROUGE STPMer Rouge0.2 MGD (million gallons per day)2022
ROSEPINE WASTEWATER SYSRosepine0.2 MGD (million gallons per day)2022
IOTA OX PONDIota0.2 MGD (million gallons per day)2022
COLFAX STPColfax0.2 MGD (million gallons per day)2022
LIVINGSTON STPLivingston0.2 MGD (million gallons per day)2022
EPPS LAGOONEpps0.2 MGD (million gallons per day)2022
BLANCHARD SEWERAGE SYSTEMBlanchard0.19 MGD (million gallons per day)2022
OBERLIN LAGOONOberlin0.19 MGD (million gallons per day)2022
RINGGOLD NORTH STPRinggold0.185 MGD (million gallons per day)2022
Bedico Regional STPPonchatoula0.18 MGD (million gallons per day)2022
OLLA WWTPOlla0.18 MGD (million gallons per day)2022
MONTGOMERY LAGOONSMontgomery0.18 MGD (million gallons per day)2022
CHENEYVILLE SEWAGE DISPOSAL SYSTEMCheneyville0.175 MGD (million gallons per day)2022
CULLEN STPCullen0.171 MGD (million gallons per day)2022
HAUGHTON STPHaughton0.16 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.