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

Wastewater treatment plants in United States · Pennsylvania

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851 inventory records · EPA Clean Watersheds Needs Survey 2022

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

851 results

CompareNameNative sizeYear
ALCOSAN STP (ALLEGHENY COUNTY)Pittsburgh250 MGD (million gallons per day)2022
PHILADELPHIA WATER DEPT (NE)Philadelphia210 MGD (million gallons per day)2022
PHILADELPHIA WATER DEPT (SW)Philadelphia200 MGD (million gallons per day)2022
PHILADELPHIA WATER DEPT (SE)Philadelphia112 MGD (million gallons per day)2022
DELCORA CHESTER STPChester44 MGD (million gallons per day)2022
LEHIGH CO A - ALLENTOWNAllentown40 MGD (million gallons per day)2022
LANCASTER CITY STPLancaster32.08 MGD (million gallons per day)2022
BETHLEHEM CITY STPBethlehem20 MGD (million gallons per day)2022
TYRONE BORO STPTyrone17.04 MGD (million gallons per day)2022
Capital Region WaterHarrisburg15.2 MGD (million gallons per day)2022
LANCASTER AREA SEWER AUTH STPLancaster15 MGD (million gallons per day)2022
JOHNSTOWN CITY STPJohnstown12 MGD (million gallons per day)2022
ALTOONA WESTERLY STPAltoona10.8 MGD (million gallons per day)2022
BUTLER AREA STPButler10.03 MGD (million gallons per day)2022
EASTON AREA STPEaston10 MGD (million gallons per day)2022
E NORR PLYM WHIT STPPlymouth Meeting9.3 MGD (million gallons per day)2022
GREATER HAZLETON STPHazleton8.9 MGD (million gallons per day)2022
UPPER MORELAND-HATBORO JNT SEWWillow Grove8.37 MGD (million gallons per day)2022
GTR POTTSVILLE AREA - MAIN STPPottsville8.21 MGD (million gallons per day)2022
WARMINSTER STPWarminster8.18 MGD (million gallons per day)2022
LEBANON CITY STPLebanon8 MGD (million gallons per day)2022
SHARON CITY STPSharon7.8 MGD (million gallons per day)2022
INDIANA BORO STPIndiana7.75 MGD (million gallons per day)2022
MEADVILLE STPMeadville7.501 MGD (million gallons per day)2022
DOWNINGTOWN AREA STPDowningtown7.134 MGD (million gallons per day)2022
KISKI VALLEY WPCALeechburg7.04 MGD (million gallons per day)2022
LRBSA THROOP STPScranton7 MGD (million gallons per day)2022
SHAMOKIN-COAL TWP STPShamokin7 MGD (million gallons per day)2022
AMBLER BORO STPAmbler6.5 MGD (million gallons per day)2022
NEW CASTLE STPNew Castle6.5 MGD (million gallons per day)2022
HATFIELD TWP STPColmar6.43 MGD (million gallons per day)2022
SWATARA TWP AUTHHummelstown6.3 MGD (million gallons per day)2022
MCCANDLESS TWP - PINE CREEK STPGibsonia6 MGD (million gallons per day)2022
WEST GOSHEN STPWest Chester6 MGD (million gallons per day)2022
LOWER LACKAWANNA VLY STPDuryea6 MGD (million gallons per day)2022
LRBSA ARCHBALD STPJermyn6 MGD (million gallons per day)2022
CARLISLE BORO STPCarlisle6 MGD (million gallons per day)2022
LOWER ALLEN TWP STPNew Cumberland5.95 MGD (million gallons per day)2022
CANONSBURG HOUSTON JOINT AUTHCanonsburg5.6 MGD (million gallons per day)2022
CLARKS SUMMIT / S ABINGTON STPChinchilla5 MGD (million gallons per day)2022
EPHRATA BORO STPEphrata4.3 MGD (million gallons per day)2022
DOVER TWP STPDover4 MGD (million gallons per day)2022
ELLWOOD CITY BORO STPEllwood City3.3 MGD (million gallons per day)2022
DANVILLE BORO STPDanville3.22 MGD (million gallons per day)2022
GROVE CITY BORO STPGrove City3.02 MGD (million gallons per day)2022
CONSHOHOCKEN BORO AUTHConshohocken3 MGD (million gallons per day)2022
WARMINSTER MUN AUTH NAWC WWTPWarminster3 MGD (million gallons per day)2022
WARREN BORO STPWarren3 MGD (million gallons per day)2022
LEWISTOWN BORO STPLewistown2.818 MGD (million gallons per day)2022
UPPER GWYNEDD TWP STPNorth Wales2.7 MGD (million gallons per day)2022
MILTON REGIONAL STPMilton2.6 MGD (million gallons per day)2022
LEWISBURG AREA STPLewisburg2.42 MGD (million gallons per day)2022
EBENSBURG BORO STPEbensburg2.25 MGD (million gallons per day)2022
AMITY TWP (BERKS) STPDouglassville2.2 MGD (million gallons per day)2022
RIDGWAY BORO STPRidgway2.2 MGD (million gallons per day)2022
PENN HILL MUN - PLUM CREEK STPVerona2.19 MGD (million gallons per day)2022
MECHANICSBURG STPMechanicsburg2.09 MGD (million gallons per day)2022
SAXONBURG AREA STPRenfrew2.05 MGD (million gallons per day)2022
CHIPPEWA TWP STPBeaver Falls2.03 MGD (million gallons per day)2022
SHENANDOAH SEWAGE TFShenandoah2.01 MGD (million gallons per day)2022
DUQUESNE STPDuquesne2.01 MGD (million gallons per day)2022
WHITEMARSH TWP AUTH STPLafayette Hill2 MGD (million gallons per day)2022
UPPER MONTGOMERY JOINT AUTHPennsburg2 MGD (million gallons per day)2022
MOON TWP MA - FLAUGHERTY RUNCoraopolis2 MGD (million gallons per day)2022
MOSHANNON VALLEY STPPhilipsburg1.77 MGD (million gallons per day)2022
DILLSBURG BOROUGH STPDillsburg1.7 MGD (million gallons per day)2022
NORTHEASTERN YORK MT WOLF STPMount Wolf1.7 MGD (million gallons per day)2022
COALDALE LANSFORD STPCoaldale1.65 MGD (million gallons per day)2022
BANGOR BORO STPBangor1.6 MGD (million gallons per day)2022
CENTRAL CARBON Municipal AuthorityLehighton1.6 MGD (million gallons per day)2022
NORTH COVENTRY MUN AUTHPottstown1.5 MGD (million gallons per day)2022
NORTHAMPTON BORO STPNorthampton1.5 MGD (million gallons per day)2022
PINE GROVE STPPine Grove1.5 MGD (million gallons per day)2022
SLATINGTON BORO STPSlatington1.5 MGD (million gallons per day)2022
KUTZTOWN BORO STPKutztown1.5 MGD (million gallons per day)2022
BADEN BORO STPBaden1.5 MGD (million gallons per day)2022
Tiadaghton Valley MA - WW Treatment and Conveyance SystemJersey Shore1.5 MGD (million gallons per day)2022
ROBESONIA-WERNERSVILLE STPWernersville1.4 MGD (million gallons per day)2022
MYERSTOWN BOROMyerstown1.4 MGD (million gallons per day)2022
FRACKVILLE AREA MUN AUTHFrackville1.4 MGD (million gallons per day)2022
MIDLAND BORO STPMidland1.39 MGD (million gallons per day)2022
MAHANOY CITY STPMahanoy City1.38 MGD (million gallons per day)2022
MT PLEASANT BORO STPMount Pleasant1.36 MGD (million gallons per day)2022
KELLY TWP MUN AUTHLewisburg1.31 MGD (million gallons per day)2022
PINE CREEK MA STPJersey Shore1.31 MGD (million gallons per day)2022
MOUNT JOY BORO STPMount Joy1.3 MGD (million gallons per day)2022
NAZARETH BORO STPNazareth1.3 MGD (million gallons per day)2022
DUBOIS CITY STPDu Bois1.3 MGD (million gallons per day)2022
SPRING TOWNSHIP STPReading1.25 MGD (million gallons per day)2022
MCCANDLESS TWP - LONGVUE #1 STPPittsburgh1.21 MGD (million gallons per day)2022
OAKMONT BORO STPOakmont1.21 MGD (million gallons per day)2022
MOUNT UNION BOROMount Union1.2 MGD (million gallons per day)2022
FOREST HILLS SOUTH FORK STPSouth Fork1.2 MGD (million gallons per day)2022
EDINBORO BORO STPEdinboro1.2 MGD (million gallons per day)2022
CONCORD TWP SEW AUTHGlen Mills1.2 MGD (million gallons per day)2022
MONACA BORO STPMonaca1.16 MGD (million gallons per day)2022
NEW HOLLAND BORO STPNew Holland1.14 MGD (million gallons per day)2022
HEMPFIELD TWP MA - DARRAGH STPDarragh1.12 MGD (million gallons per day)2022
FORD CITY STPFord City1.11 MGD (million gallons per day)2022
TELFORD BORO AUTH STPTelford1.1 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.