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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
PARK VIEW LAGOONEldridge0.5 MGD (million gallons per day)2022
PARKERSBURG STLParkersburg0.489 MGD (million gallons per day)2022
SHELLSBURG WWTPShellsburg0.48 MGD (million gallons per day)2022
URBANA WWTPUrbana0.48 MGD (million gallons per day)2022
HILLS WWTPHills0.472 MGD (million gallons per day)2022
HEDRICK WWTPHedrick0.465 MGD (million gallons per day)2022
STATE CENTER WWTPState Center0.465 MGD (million gallons per day)2022
LAKE VIEW WWTPLake View0.46 MGD (million gallons per day)2022
WINTHROP STPWinthrop0.46 MGD (million gallons per day)2022
BLUEGRASS WWTPBlue Grass0.454 MGD (million gallons per day)2022
MORNING SUN STLMorning Sun0.452 MGD (million gallons per day)2022
MAXWELL WWTPMaxwell0.45 MGD (million gallons per day)2022
WELLMAN WWTPWellman0.45 MGD (million gallons per day)2022
GILMAN STLGilman0.448 MGD (million gallons per day)2022
REMSEN WWTPRemsen0.444 MGD (million gallons per day)2022
MANSON WWTPManson0.442 MGD (million gallons per day)2022
PEOSTA WWTPPeosta0.442 MGD (million gallons per day)2022
FAYETTE WWTPFayette0.438 MGD (million gallons per day)2022
WYOMING WWTPWyoming0.434 MGD (million gallons per day)2022
MISSOURI VALLEY STPMissouri Valley0.433 MGD (million gallons per day)2022
MECHANICSVILLE WWTPMechanicsville0.43 MGD (million gallons per day)2022
WALFORD WWTPWalford0.43 MGD (million gallons per day)2022
GILBERT STLGilbert0.428 MGD (million gallons per day)2022
KEYSTONE WWTPKeystone0.428 MGD (million gallons per day)2022
DUMONT STLDumont0.423 MGD (million gallons per day)2022
CENTERVILLE WEST WWTPCenterville0.41 MGD (million gallons per day)2022
LANSING WWTPLansing0.407 MGD (million gallons per day)2022
HOSPERS WWTPHospers0.4 MGD (million gallons per day)2022
LISBON WWTPLisbon0.4 MGD (million gallons per day)2022
MANNING WWTPManning0.4 MGD (million gallons per day)2022
ELMA WWTPElma0.4 MGD (million gallons per day)2022
FONTANELLE STLFontanelle0.398 MGD (million gallons per day)2022
PRINCETON WWTPPrinceton0.392 MGD (million gallons per day)2022
IDA GROVE WWTPIda Grove0.39 MGD (million gallons per day)2022
VAN HORNE WWTPVan Horne0.387 MGD (million gallons per day)2022
ALBERT CITY WWTPAlbert City0.38 MGD (million gallons per day)2022
CALMAR WWTPCalmar0.372 MGD (million gallons per day)2022
MOVILLE WWTPMoville0.37 MGD (million gallons per day)2022
MIDDLETOWN WWTPMiddletown0.367 MGD (million gallons per day)2022
MALVERN STLMalvern0.365 MGD (million gallons per day)2022
ELGIN WWTPElgin0.364 MGD (million gallons per day)2022
DURANT WWTPDurant0.358 MGD (million gallons per day)2022
HOLSTEIN WWTPHolstein0.355 MGD (million gallons per day)2022
ANITA STLAnita0.35 MGD (million gallons per day)2022
APLINGTON WWTPAplington0.35 MGD (million gallons per day)2022
BOYDEN WWTPBoyden0.35 MGD (million gallons per day)2022
GRISWOLD WWTPGriswold0.347 MGD (million gallons per day)2022
MEDIAPOLIS STLMediapolis0.34 MGD (million gallons per day)2022
GREENE WWTPGreene0.334 MGD (million gallons per day)2022
ADAIR WWTPAdair0.33 MGD (million gallons per day)2022
WINFIELD WWTPWinfield0.33 MGD (million gallons per day)2022
BELLEVUE STPBellevue0.33 MGD (million gallons per day)2022
ARMSTRONG WWTPArmstrong0.325 MGD (million gallons per day)2022
SWISHER WWTPSwisher0.32 MGD (million gallons per day)2022
WHAT CHEER WWTPWhat Cheer0.32 MGD (million gallons per day)2022
BAXTER WWTPBaxter0.319 MGD (million gallons per day)2022
EDGEWOOD STPEdgewood0.314 MGD (million gallons per day)2022
WEST POINT WASTEWATERWest Point0.314 MGD (million gallons per day)2022
MONONA WASTEWATERMonona0.312 MGD (million gallons per day)2022
RUSSELL WWTPRussell0.31 MGD (million gallons per day)2022
WAYLAND STLWayland0.31 MGD (million gallons per day)2022
LOHRVILLE WWTPLohrville0.308 MGD (million gallons per day)2022
ODEBOLT WWTPOdebolt0.306 MGD (million gallons per day)2022
DAKOTA CITY WWTPDakota City0.3 MGD (million gallons per day)2022
GLIDDEN WWTPGlidden0.3 MGD (million gallons per day)2022
KINGSLEY LAGOONKingsley0.3 MGD (million gallons per day)2022
LAKE CITY WWTPLake City0.3 MGD (million gallons per day)2022
MAPLETON, WWTPMapleton0.3 MGD (million gallons per day)2022
SPRINGVILLE WWTPSpringville0.3 MGD (million gallons per day)2022
OSSIAN WASTEWATEROssian0.293 MGD (million gallons per day)2022
SCRANTON WWTPScranton0.29 MGD (million gallons per day)2022
KALONA WWTPKalona0.285 MGD (million gallons per day)2022
SLOAN WWTPSloan0.285 MGD (million gallons per day)2022
FAIRBANK WWTPFairbank0.282 MGD (million gallons per day)2022
LAKE PARK WWTPLake Park0.282 MGD (million gallons per day)2022
SHELL ROCK WWTPShell Rock0.282 MGD (million gallons per day)2022
ELK RUN HEIGHTS STPEvansdale0.281 MGD (million gallons per day)2022
GLADBROOK WWTPGladbrook0.28 MGD (million gallons per day)2022
LIME SPRINGS WWTPLime Springs0.28 MGD (million gallons per day)2022
GUTHRIE CENTER WWTPGuthrie Center0.279 MGD (million gallons per day)2022
SUTHERLAND STLSutherland0.278 MGD (million gallons per day)2022
WHEATLAND WWTPWheatland0.277 MGD (million gallons per day)2022
NORWAY WWTPNorway0.273 MGD (million gallons per day)2022
CAMBRIDGE STLCambridge0.271 MGD (million gallons per day)2022
HUMESTON LGNHumeston0.27 MGD (million gallons per day)2022
DOWS WWTPDows0.267 MGD (million gallons per day)2022
CONRAD WWTPConrad0.26 MGD (million gallons per day)2022
HARTFORD STLHartford0.26 MGD (million gallons per day)2022
NEWELL WWTPNewell0.255 MGD (million gallons per day)2022
HAMBURG STLHamburg0.252 MGD (million gallons per day)2022
ALBION STLAlbion0.25 MGD (million gallons per day)2022
MCGREGOR WWTPMc Gregor0.25 MGD (million gallons per day)2022
READLYN WWTPReadlyn0.25 MGD (million gallons per day)2022
WEST BEND WWTPWest Bend0.25 MGD (million gallons per day)2022
LOGAN WWTPLogan0.248 MGD (million gallons per day)2022
INWOOD STLInwood0.245 MGD (million gallons per day)2022
NORTH ENGLISH WWTPNorth English0.242 MGD (million gallons per day)2022
ALTON WWTPAlton0.241 MGD (million gallons per day)2022
OXFORD WWTPOxford0.239 MGD (million gallons per day)2022
CORRECTIONVILLE WWTPCorrectionville0.238 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.