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

Wastewater treatment plants in United States · Oregon

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213 inventory records · EPA Clean Watersheds Needs Survey 2022

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

213 results

CompareNameNative sizeYear
COLUMBIA BLVD. STPPortland100 MGD (million gallons per day)2022
MWMC - EUGENE/SPRINGFIELD STPEugene49 MGD (million gallons per day)2022
ROCK CREEK STPHillsboro39.05 MGD (million gallons per day)2022
SALEM WILLOW LAKE STPKeizer35 MGD (million gallons per day)2022
MCMINNVILLE WWTPMcminnville35 MGD (million gallons per day)2022
ST HELENS STPPortland30 MGD (million gallons per day)2022
DURHAM STPPortland22.6 MGD (million gallons per day)2022
MEDFORD STPCentral Point20 MGD (million gallons per day)2022
GRESHAM STPPortland17 MGD (million gallons per day)2022
TRI CITY WPCPOregon City13 MGD (million gallons per day)2022
KELLOGG CREEK STPClackamas10 MGD (million gallons per day)2022
CORVALLIS STPCorvallis9.7 MGD (million gallons per day)2022
ALBANY-MILLERSBURG WATER RECLAMATION FACILITYAlbany8.7 MGD (million gallons per day)2022
TRYON CREEK STPLake Oswego8.3 MGD (million gallons per day)2022
Roseburg Urban Sanitary AuthorityRoseburg7.9 MGD (million gallons per day)2022
HILLSBORO WESTSIDE STPHillsboro7.5 MGD (million gallons per day)2022
BEND WRFBend7.1 MGD (million gallons per day)2022
KLAMATH -FALLS SPRING STREETKlamath Falls6 MGD (million gallons per day)2022
FOREST GROVE STPForest Grove5.5 MGD (million gallons per day)2022
PENDLETON STPPendleton5.5 MGD (million gallons per day)2022
NEWBERG WYNOOSKI STREET STPNewberg5 MGD (million gallons per day)2022
ASTORIA STPAstoria4.2 MGD (million gallons per day)2022
THE DALLES STPThe Dalles4.15 MGD (million gallons per day)2022
OAK LODGE STPPortland4 MGD (million gallons per day)2022
SANDY STPBoring4 MGD (million gallons per day)2022
GRANTS PASS STPGrants Pass4 MGD (million gallons per day)2022
WOODBURN POTWWoodburn3.33 MGD (million gallons per day)2022
HERMISTON Recycled Water PlantHermiston3.17 MGD (million gallons per day)2022
ONTARIO STPOntario3.06 MGD (million gallons per day)2022
LEBANON STPLebanon3 MGD (million gallons per day)2022
LINCOLN CITY STPLincoln City3 MGD (million gallons per day)2022
SILVERTON STPSilverton2.5 MGD (million gallons per day)2022
DALLAS STPDallas2.5 MGD (million gallons per day)2022
COOS BAY STP NO. 1Coos Bay2.4 MGD (million gallons per day)2022
ASHLAND STPAshland2.3 MGD (million gallons per day)2022
NEWPORT STPNewport2.3 MGD (million gallons per day)2022
WILSONVILLE STPWilsonville2.25 MGD (million gallons per day)2022
SEASIDE STPSeaside2.25 MGD (million gallons per day)2022
COOS BAY STP NO. 2 - EMPIRECoos Bay2.2 MGD (million gallons per day)2022
NORTH BEND STPNorth Bend2.2 MGD (million gallons per day)2022
COTTAGE GROVE STPCottage Grove2.04 MGD (million gallons per day)2022
CANBY STPCanby2 MGD (million gallons per day)2022
BAKER CITY WWTPBaker City2 MGD (million gallons per day)2022
STAYTON STPStayton1.94 MGD (million gallons per day)2022
SOUTH SUBURBAN STPKlamath Falls1.9 MGD (million gallons per day)2022
MOLALLA STPMolalla1.85 MGD (million gallons per day)2022
TROUTDALE STPTroutdale1.6 MGD (million gallons per day)2022
INDEPENDENCE STPIndependence1.6 MGD (million gallons per day)2022
WINSTON-GREEN STPRoseburg1.6 MGD (million gallons per day)2022
SWEET HOME STPSweet Home1.4 MGD (million gallons per day)2022
BROOKINGS WWTPBrookings1.3 MGD (million gallons per day)2022
VENETA STPVeneta1.25 MGD (million gallons per day)2022
BURNS STPHines1.14 MGD (million gallons per day)2022
PRINEVILLE STPPrineville1.1 MGD (million gallons per day)2022
SUTHERLIN STPSutherlin1.07 MGD (million gallons per day)2022
TILLAMOOK STPTillamook1.06 MGD (million gallons per day)2022
REEDSPORT STPReedsport1.02 MGD (million gallons per day)2022
HOOD RIVER STPHood River1 MGD (million gallons per day)2022
WARRENTON STPWarrenton1 MGD (million gallons per day)2022
MYRTLE CREEK STPMyrtle Creek0.96 MGD (million gallons per day)2022
HOODLAND STPWelches0.9 MGD (million gallons per day)2022
FLORENCE STPFlorence0.9 MGD (million gallons per day)2022
JUNCTION CITY STPJunction City0.9 MGD (million gallons per day)2022
UMATILLA STPUmatilla0.9 MGD (million gallons per day)2022
WINCHESTER BAY STPWinchester0.9 MGD (million gallons per day)2022
LAFAYETTE STPLafayette0.88 MGD (million gallons per day)2022
CANNON BEACH STPCannon Beach0.87 MGD (million gallons per day)2022
COBURG STPCorvallis0.86 MGD (million gallons per day)2022
DEPOE BAY STPDepoe Bay0.85 MGD (million gallons per day)2022
PHILOMATH WWTPPhilomath0.83 MGD (million gallons per day)2022
CRESWELL STPCreswell0.8 MGD (million gallons per day)2022
GOLD BEACH STPGold Beach0.75 MGD (million gallons per day)2022
NESKOWIN REGIONAL SANITARY AUTHORTNeskowin0.75 MGD (million gallons per day)2022
TOLEDO STPToledo0.73 MGD (million gallons per day)2022
NEHALEM BAY STPNehalem0.703 MGD (million gallons per day)2022
SHADY COVE STPShady Cove0.694 MGD (million gallons per day)2022
SCAPPOOSE STPScappoose0.65 MGD (million gallons per day)2022
MT ANGEL STPMount Angel0.61 MGD (million gallons per day)2022
MONMOUTH STPMonmouth0.6 MGD (million gallons per day)2022
ODELL STPOdell0.59 MGD (million gallons per day)2022
VERNONIA STPVernonia0.56 MGD (million gallons per day)2022
MADRAS SWWTPMadras0.54 MGD (million gallons per day)2022
JEFFERSON STPJefferson0.54 MGD (million gallons per day)2022
DAYTON STPDayton0.54 MGD (million gallons per day)2022
COQUILLE STPCoquille0.53 MGD (million gallons per day)2022
CAVE JUNCTION STPCave Junction0.52 MGD (million gallons per day)2022
CANYONVILLE STPCanyonville0.5 MGD (million gallons per day)2022
GARIBALDI STPGaribaldi0.5 MGD (million gallons per day)2022
LAKESIDE STPLakeside0.5 MGD (million gallons per day)2022
MADRAS NWWTPMadras0.5 MGD (million gallons per day)2022
RAINIER STPRainier0.5 MGD (million gallons per day)2022
ROCKAWAY BEACH STPRockaway Beach0.5 MGD (million gallons per day)2022
HARRISBURG LAGOON TREATMENT PLANTHarrisburg0.489 MGD (million gallons per day)2022
HINES STPHines0.48 MGD (million gallons per day)2022
OAKRIDGE STPOakridge0.47 MGD (million gallons per day)2022
BANDON STPBandon0.45 MGD (million gallons per day)2022
ROGUE RIVER STPRogue River0.43 MGD (million gallons per day)2022
SHERIDAN STPSheridan0.422 MGD (million gallons per day)2022
NETARTS-OCEANSIDE SANITARY DISTRICTOceanside0.4 MGD (million gallons per day)2022
PACIFIC CITY STPPacific City0.4 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.