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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
MINDEN WASTE STAB LAGOONMinden0.123 MGD (million gallons per day)2022
NEW ALBIN WWTPNew Albin0.123 MGD (million gallons per day)2022
SHELBY WWTPShelby0.123 MGD (million gallons per day)2022
SIDNEY WWTPSidney0.123 MGD (million gallons per day)2022
ROLFE STPRolfe0.123 MGD (million gallons per day)2022
PRIMGAR STLPrimghar0.122 MGD (million gallons per day)2022
GOLDFIELD STLGoldfield0.121 MGD (million gallons per day)2022
ROCKFORD WWTPRockford0.12 MGD (million gallons per day)2022
ST. CHARLES WWTPSaint Charles0.12 MGD (million gallons per day)2022
ZEARING STLZearing0.12 MGD (million gallons per day)2022
RICEVILLE WWPTRiceville0.12 MGD (million gallons per day)2022
RHODES STLRhodes0.118 MGD (million gallons per day)2022
WASHBURN WWTPWaterloo0.118 MGD (million gallons per day)2022
BURT STLBurt0.115 MGD (million gallons per day)2022
TITONKA WWTPTitonka0.115 MGD (million gallons per day)2022
NEOLA WWTPNeola0.112 MGD (million gallons per day)2022
TRURO WASTEWATERTruro0.111 MGD (million gallons per day)2022
JASPER CO. REGIONAL WASTEWATER PROKellogg0.111 MGD (million gallons per day)2022
LIVERMORE STLLivermore0.11 MGD (million gallons per day)2022
SEYMOUR STLSeymour0.11 MGD (million gallons per day)2022
WILLIAMS STLWilliams0.11 MGD (million gallons per day)2022
BADGER STLBadger0.109 MGD (million gallons per day)2022
WALL LAKE STLWall Lake0.107 MGD (million gallons per day)2022
DUNCOMBE STLDuncombe0.105 MGD (million gallons per day)2022
GRAND MOUND STLGrand Mound0.105 MGD (million gallons per day)2022
RYAN WWTPRyan0.105 MGD (million gallons per day)2022
DELHI STLDelhi0.103 MGD (million gallons per day)2022
ELK HORN WWTPElk Horn0.103 MGD (million gallons per day)2022
DANBURY SEWAGE LAGOONDanbury0.102 MGD (million gallons per day)2022
KELLOGG WWTPKellogg0.1 MGD (million gallons per day)2022
MONTROSE WWTPMontrose0.1 MGD (million gallons per day)2022
TEMPLETON WWTPTempleton0.1 MGD (million gallons per day)2022
KIRON WWTPKiron0.098 MGD (million gallons per day)2022
CONESVILLE STLConesville0.097 MGD (million gallons per day)2022
RENWICK STLRenwick0.096 MGD (million gallons per day)2022
PACKWOOD WWTPPackwood0.095 MGD (million gallons per day)2022
SWEA CITY STLSwea City0.095 MGD (million gallons per day)2022
FARMINGTON WWTPFarmington0.094 MGD (million gallons per day)2022
MANILLA WWTPManilla0.093 MGD (million gallons per day)2022
LETTS WWTPLetts0.092 MGD (million gallons per day)2022
SALEM WWTPSalem0.092 MGD (million gallons per day)2022
SCHALLER LAGOONSchaller0.092 MGD (million gallons per day)2022
OXFORD JCT. WWTPOxford Junction0.091 MGD (million gallons per day)2022
DAVIS CITY WWTPDavis City0.09 MGD (million gallons per day)2022
HINTON WWTPHinton0.09 MGD (million gallons per day)2022
RADCLIFFE LAGOONRadcliffe0.09 MGD (million gallons per day)2022
LAMONT STLLamont0.089 MGD (million gallons per day)2022
MONTPELIER SDMontpelier0.088 MGD (million gallons per day)2022
ALBURNETT WWTPAlburnett0.085 MGD (million gallons per day)2022
EARVILLE STPEarlville0.085 MGD (million gallons per day)2022
STANHOPE STLStanhope0.085 MGD (million gallons per day)2022
MURRAY STLMurray0.084 MGD (million gallons per day)2022
NEW VIENNA WWTPNew Vienna0.084 MGD (million gallons per day)2022
OCHEYEDAN WWTPOcheyedan0.084 MGD (million gallons per day)2022
CLERMONT WWTPClermont0.084 MGD (million gallons per day)2022
HOMESTEAD SDHomestead0.084 MGD (million gallons per day)2022
MERRILL WWTPMerrill0.083 MGD (million gallons per day)2022
MONTOUR STLMontour0.083 MGD (million gallons per day)2022
LOST NATION STLLost Nation0.082 MGD (million gallons per day)2022
MILTON WWTPMilton0.082 MGD (million gallons per day)2022
EARLY WWTPEarly0.081 MGD (million gallons per day)2022
GILMORE CITY STLGilmore City0.081 MGD (million gallons per day)2022
LACONA WWTPLacona0.081 MGD (million gallons per day)2022
MAYNARD WWTPMaynard0.081 MGD (million gallons per day)2022
BATTLE CREEK WWTPBattle Creek0.08 MGD (million gallons per day)2022
DOW CITY SEWAGE LAGOONDow City0.08 MGD (million gallons per day)2022
MARTELLE WASTE STAB PONDSMartelle0.08 MGD (million gallons per day)2022
NEW MARKET WWTPNew Market0.08 MGD (million gallons per day)2022
QUASQUETON STLQuasqueton0.08 MGD (million gallons per day)2022
LATIMER-COULTER WWTPLatimer0.079 MGD (million gallons per day)2022
ANDREW STPAndrew0.079 MGD (million gallons per day)2022
EMERSON WWTPEmerson0.077 MGD (million gallons per day)2022
RINGSTED WWTPRingsted0.077 MGD (million gallons per day)2022
CHARLOTTE STLCharlotte0.076 MGD (million gallons per day)2022
CASEY WWTPCasey0.075 MGD (million gallons per day)2022
GARRISON WWTPGarrison0.075 MGD (million gallons per day)2022
GARWIN STLGarwin0.075 MGD (million gallons per day)2022
ARLINGTON WWTPArlington0.075 MGD (million gallons per day)2022
ELLIOTT STLElliott0.074 MGD (million gallons per day)2022
GALVA WWTPGalva0.074 MGD (million gallons per day)2022
THOMPSON WWTPThompson0.074 MGD (million gallons per day)2022
LAUREL STLLaurel0.073 MGD (million gallons per day)2022
LAWTON LAGOONLawton0.073 MGD (million gallons per day)2022
STANTON STLStanton0.073 MGD (million gallons per day)2022
LEHIGH WWTPLehigh0.072 MGD (million gallons per day)2022
RICHLAND WWTPRichland0.072 MGD (million gallons per day)2022
THORNTON STLThornton0.072 MGD (million gallons per day)2022
MYSTIC WWTPMystic0.071 MGD (million gallons per day)2022
HAWKEYE WWTPHawkeye0.071 MGD (million gallons per day)2022
BAYARD WWTPBayard0.07 MGD (million gallons per day)2022
FLOYD WWTPFloyd0.07 MGD (million gallons per day)2022
HARPERS FERRY WWTPHarpers Ferry0.07 MGD (million gallons per day)2022
FREMONT STPFremont0.07 MGD (million gallons per day)2022
DELMAR STLDelmar0.069 MGD (million gallons per day)2022
ROYAL WSPRoyal0.069 MGD (million gallons per day)2022
PISGAH STLPisgah0.068 MGD (million gallons per day)2022
PRESCOTT, WWTPPrescott0.068 MGD (million gallons per day)2022
CALAMUS STLCalamus0.067 MGD (million gallons per day)2022
IRWIN WASTE STAB PONDSIrwin0.065 MGD (million gallons per day)2022
BUSSEY STLBussey0.065 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.