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

Wastewater treatment plants in United States · Iowa

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775 inventory records · EPA Clean Watersheds Needs Survey 2022

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

775 results

CompareNameNative sizeYear
WELDON WWTPWeldon0.021 MGD (million gallons per day)2022
WESTGATE WWTPWestgate0.021 MGD (million gallons per day)2022
SAINT LUCAS WWTPSaint Lucas0.021 MGD (million gallons per day)2022
HARVEY STPHarvey0.021 MGD (million gallons per day)2022
ORAN SAN. DISTRICT STPOran0.021 MGD (million gallons per day)2022
ALLERTON NORTH LAGOONAllerton0.02 MGD (million gallons per day)2022
CHESTER WWTPChester0.02 MGD (million gallons per day)2022
DELAWARE STLDelaware0.02 MGD (million gallons per day)2022
GRAND RIVER WWTPGrand River0.02 MGD (million gallons per day)2022
PLEASANT PLAIN WWTPBrighton0.02 MGD (million gallons per day)2022
PORTSMOUTH STLPortsmouth0.02 MGD (million gallons per day)2022
STANLEY STLStanley0.02 MGD (million gallons per day)2022
SWALEDALE STLSwaledale0.02 MGD (million gallons per day)2022
MINEOLA CDPMineola0.019 MGD (million gallons per day)2022
ELWOOD COMMUNITY SDLost Nation0.019 MGD (million gallons per day)2022
MILLERSBURG WWTPNorth English0.019 MGD (million gallons per day)2022
MT AUBURN WWTPMount Auburn0.019 MGD (million gallons per day)2022
CASTALIA STLCastalia0.019 MGD (million gallons per day)2022
WEBB STPWebb0.019 MGD (million gallons per day)2022
BERNARD STPBernard0.018 MGD (million gallons per day)2022
DECATUR CITY WWTPDecatur0.018 MGD (million gallons per day)2022
LONE ROCK STLLone Rock0.018 MGD (million gallons per day)2022
OTO LAGOONOto0.018 MGD (million gallons per day)2022
TINGLEY WASTEWATERTingley0.018 MGD (million gallons per day)2022
WESTFIELD WWTPWestfield0.018 MGD (million gallons per day)2022
DRAKESVILLE WWTPDrakesville0.017 MGD (million gallons per day)2022
FLORIS LAGOONFloris0.017 MGD (million gallons per day)2022
ST PAUL STPSaint Paul0.017 MGD (million gallons per day)2022
TORONTO WASTEWATERWheatland0.017 MGD (million gallons per day)2022
WEST CHESTER WWTPWest Chester0.017 MGD (million gallons per day)2022
WILLIAMSON WWTPWilliamson0.017 MGD (million gallons per day)2022
ROSE HILLRose Hill0.017 MGD (million gallons per day)2022
LARRABEE WWTPLarrabee0.016 MGD (million gallons per day)2022
MACKSBURG WWTPMacksburg0.016 MGD (million gallons per day)2022
ROCK FALLS WWTPRock Falls0.016 MGD (million gallons per day)2022
MASONVILLE LAGOONSMasonville0.015 MGD (million gallons per day)2022
HILLSBORO STLHillsboro0.015 MGD (million gallons per day)2022
MELROSE WWTPMelrose0.015 MGD (million gallons per day)2022
MARTINSBURG-RUSSMartinsburg0.014 MGD (million gallons per day)2022
RICKETTS STPRicketts0.014 MGD (million gallons per day)2022
Watkins CDPWatkins0.013 MGD (million gallons per day)2022
CARPENTER SEPTICSCarpenter0.013 MGD (million gallons per day)2022
CHILLICOTHE WWTPChillicothe0.013 MGD (million gallons per day)2022
HARPER WWTPHarper0.013 MGD (million gallons per day)2022
ORCHARD LAGOONOrchard0.013 MGD (million gallons per day)2022
PROMISE CITY STLPromise City0.013 MGD (million gallons per day)2022
SPRAGUEVILLE STPSpragueville0.013 MGD (million gallons per day)2022
ANDOVER STLAndover0.012 MGD (million gallons per day)2022
CROMWELL LAGOONCromwell0.012 MGD (million gallons per day)2022
ROME STLRome0.012 MGD (million gallons per day)2022
ST MARYS WASTEWATERSaint Marys0.012 MGD (million gallons per day)2022
SHARPSBURG WASTEWATERSharpsburg0.012 MGD (million gallons per day)2022
WEBSTER RUSSWebster0.012 MGD (million gallons per day)2022
ZWINGLE STPZwingle0.012 MGD (million gallons per day)2022
MAPLE RIVER JUNCTION STPCarroll0.011 MGD (million gallons per day)2022
OYENS LAGOONOyens0.011 MGD (million gallons per day)2022
ST ANTHONY WASTEWATERSaint Anthony0.011 MGD (million gallons per day)2022
SPRINGBROOK WWTPSpragueville0.011 MGD (million gallons per day)2022
UNIONVILLE WWTPUnionville0.011 MGD (million gallons per day)2022
FESTINA WWTFFort Atkinson0.01 MGD (million gallons per day)2022
ARGYLEArgyle0.01 MGD (million gallons per day)2022
COLESBURG NW STLColesburg0.01 MGD (million gallons per day)2022
TRUESDALE WASTEWATERTruesdale0.009 MGD (million gallons per day)2022
RANDALIA WWTRandalia0.009 MGD (million gallons per day)2022
DOLLIVER STPDolliver0.008 MGD (million gallons per day)2022
DOUGHERTY WWTPDougherty0.007 MGD (million gallons per day)2022
KINROSS-RUSSWellman0.007 MGD (million gallons per day)2022
THAYER WASTEWATERThayer0.007 MGD (million gallons per day)2022
BALLTOWN SEPTIC TANKSSherrill0.006 MGD (million gallons per day)2022
PLANO WWTPPlano0.006 MGD (million gallons per day)2022
RINARD STLFarnhamville0.006 MGD (million gallons per day)2022
SAGEVILLE WASTEWATERDubuque0.006 MGD (million gallons per day)2022
MT. STERLING-RUSSMount Sterling0.005 MGD (million gallons per day)2022
BANKSTON STPDyersville0.004 MGD (million gallons per day)2022
MARATHON WWTPMarathonNot reported 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.