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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
UNIVERSITY PARK WASTEWATERUniversity Park0.065 MGD (million gallons per day)2022
UNION WWTPUnion0.064 MGD (million gallons per day)2022
DELTA WWTPDelta0.063 MGD (million gallons per day)2022
RUNNELLS STPRunnells0.063 MGD (million gallons per day)2022
WESLEY WWTPWesley0.063 MGD (million gallons per day)2022
TWIN LAKES STPRockwell City0.062 MGD (million gallons per day)2022
CINCINNATI STLCincinnati0.061 MGD (million gallons per day)2022
LEWIS STLLewis0.061 MGD (million gallons per day)2022
LORIMOR WWTPLorimor0.061 MGD (million gallons per day)2022
TERRIL WWTPTerril0.061 MGD (million gallons per day)2022
AINSWORTH WWTPAinsworth0.06 MGD (million gallons per day)2022
ALTA VISTA WWTPAlta Vista0.06 MGD (million gallons per day)2022
BENNETT STLBennett0.06 MGD (million gallons per day)2022
GRANDVIEW WWTPGrandview0.06 MGD (million gallons per day)2022
MARBLE ROCK WWTPMarble Rock0.06 MGD (million gallons per day)2022
LA MOTTE STPLa Motte0.06 MGD (million gallons per day)2022
UTE WWTLUte0.059 MGD (million gallons per day)2022
CHARTER OAK LGNCharter Oak0.058 MGD (million gallons per day)2022
CRESCENT WWTPCrescent0.058 MGD (million gallons per day)2022
DONAHUE WWTPDonahue0.058 MGD (million gallons per day)2022
IRETON WWTPIreton0.058 MGD (million gallons per day)2022
RUDD WWTPRudd0.057 MGD (million gallons per day)2022
BATAVIA WWTPBatavia0.056 MGD (million gallons per day)2022
FERTILE WWTPFertile0.056 MGD (million gallons per day)2022
HOLY CROSS WWTPHoly Cross0.056 MGD (million gallons per day)2022
LITTLE ROCK WWTPLittle Rock0.056 MGD (million gallons per day)2022
BONAPARTE WWTPBonaparte0.055 MGD (million gallons per day)2022
MALLARD LAGOONMallard0.054 MGD (million gallons per day)2022
SALIX WWTPSalix0.054 MGD (million gallons per day)2022
ARCADIA STLArcadia0.053 MGD (million gallons per day)2022
FARNHAMVILLE STLFarnhamville0.053 MGD (million gallons per day)2022
BALDWIN WWTPBaldwin0.053 MGD (million gallons per day)2022
MILES WWTPMiles0.053 MGD (million gallons per day)2022
MACBRIDE SANITARY SEWER DISTRICTSolon0.051 MGD (million gallons per day)2022
KIMBALLTON STLKimballton0.05 MGD (million gallons per day)2022
DIAMOND JO WORTHNorthwood0.05 MGD (million gallons per day)2022
PIERSON WWTPPierson0.05 MGD (million gallons per day)2022
VAIL LAGOONVail0.05 MGD (million gallons per day)2022
MAHARISHI VEDIC CITY WWTPFairfield0.05 MGD (million gallons per day)2022
STEAMBOAT ROCK WASTE WATERSteamboat Rock0.049 MGD (million gallons per day)2022
ARTHUR STLArthur0.048 MGD (million gallons per day)2022
BLAKESBURG WWTPBlakesburg0.048 MGD (million gallons per day)2022
DEFIANCE STLDefiance0.048 MGD (million gallons per day)2022
GREELEY STLGreeley0.048 MGD (million gallons per day)2022
SOLDIER, WWTPSoldier0.048 MGD (million gallons per day)2022
CLEGHORN WWTPCleghorn0.047 MGD (million gallons per day)2022
Sun Valley Sanitary DistrictEllston0.047 MGD (million gallons per day)2022
MCCALLSBURG STLMc Callsburg0.047 MGD (million gallons per day)2022
MENLO WWTPMenlo0.046 MGD (million gallons per day)2022
STOCKPORT WWTPStockport0.046 MGD (million gallons per day)2022
PROTIVIN WWTPProtivin0.046 MGD (million gallons per day)2022
ASHTON WWTPAshton0.045 MGD (million gallons per day)2022
BLAIRSBURG STLBlairsburg0.045 MGD (million gallons per day)2022
BLENCOE STLBlencoe0.045 MGD (million gallons per day)2022
DIXON WWTPDixon0.045 MGD (million gallons per day)2022
NICHOLS STLNichols0.045 MGD (million gallons per day)2022
WASHTA WWTPWashta0.045 MGD (million gallons per day)2022
SPILLVILLE WWTPSpillville0.045 MGD (million gallons per day)2022
DOON STLDoon0.044 MGD (million gallons per day)2022
FARRAGUT STLFarragut0.044 MGD (million gallons per day)2022
OAKVILLE LAGOONOakville0.044 MGD (million gallons per day)2022
WADENA WW STABIL LAGOONWadena0.044 MGD (million gallons per day)2022
DENMARK SAN. DISTR. STPDenmark0.044 MGD (million gallons per day)2022
CHELSEA LAGOONChelsea0.043 MGD (million gallons per day)2022
LIBERTYVILLE WWTPLibertyville0.043 MGD (million gallons per day)2022
MINGO STLMingo0.043 MGD (million gallons per day)2022
ORIENT LAGOONOrient0.043 MGD (million gallons per day)2022
ROWLEY STLRowley0.043 MGD (million gallons per day)2022
MCCAUSLAND WWTPMc Causland0.042 MGD (million gallons per day)2022
MACEDONIA WW STAB LAGOONMacedonia0.042 MGD (million gallons per day)2022
RIPPEY WWTPRippey0.042 MGD (million gallons per day)2022
WESTSIDE STLWestside0.042 MGD (million gallons per day)2022
CUMBERLAND WWTPCumberland0.041 MGD (million gallons per day)2022
LYNNVILLE STLLynnville0.041 MGD (million gallons per day)2022
QUIMBY WWTPQuimby0.041 MGD (million gallons per day)2022
RAKE WWTPRake0.041 MGD (million gallons per day)2022
ATALISSA STLAtalissa0.04 MGD (million gallons per day)2022
AUBURN STLAuburn0.04 MGD (million gallons per day)2022
CLEARFIELD WWTPClearfield0.04 MGD (million gallons per day)2022
HOUGHTON STLHoughton0.04 MGD (million gallons per day)2022
MALCOM STLMalcom0.04 MGD (million gallons per day)2022
MINBURN STLMinburn0.04 MGD (million gallons per day)2022
PATON WWTPPaton0.04 MGD (million gallons per day)2022
PATTERSON WWTPPatterson0.04 MGD (million gallons per day)2022
RIVERTON WWTPRiverton0.04 MGD (million gallons per day)2022
SILVER CITY WASTEWATERSilver City0.04 MGD (million gallons per day)2022
STOCKTON WWTPStockton0.04 MGD (million gallons per day)2022
TROY MILLS WWTPTroy Mills0.04 MGD (million gallons per day)2022
BARNUM STLBarnum0.038 MGD (million gallons per day)2022
BODE STLBode0.038 MGD (million gallons per day)2022
MOORHEAD WWTPMoorhead0.038 MGD (million gallons per day)2022
LITTLE SIOUX STPLittle Sioux0.037 MGD (million gallons per day)2022
Goose Lake STLGoose Lake0.037 MGD (million gallons per day)2022
DIAGONAL STLDiagonal0.037 MGD (million gallons per day)2022
FORT ATKINSON SEPTICSFort Atkinson0.037 MGD (million gallons per day)2022
DEEP RIVER STLDeep River0.036 MGD (million gallons per day)2022
HARCOURT WWTPHarcourt0.036 MGD (million gallons per day)2022
IONIA WWTPIonia0.036 MGD (million gallons per day)2022
BEAMAN WWTPBeaman0.035 MGD (million gallons per day)2022
COIN WWTPCoin0.035 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.