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

Wastewater treatment plants in United States · Massachusetts

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124 inventory records · EPA Clean Watersheds Needs Survey 2022

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

124 results

CompareNameNative sizeYear
MWRA Deer Island WWTFBoston310 MGD (million gallons per day)2022
Springfield Sewerage Collection System and WPCFSpringfield67.1 MGD (million gallons per day)2022
Upper Blackstone Clean WaterMillbury63 MGD (million gallons per day)2022
Greater Lawrence Sanitary DistrictNorth Andover55 MGD (million gallons per day)2022
Lowell Sewerage Collection System and WWTFLowell32 MGD (million gallons per day)2022
Fall River Sewerage Collection System and WWTFFall River30.9 MGD (million gallons per day)2022
New Bedford Sewerage Collection System and WPCFNew Bedford30 MGD (million gallons per day)2022
South Essex Sewer District WWTPSalem29.71 MGD (million gallons per day)2022
Lynn Sewerage Collection System and WPCFLynn25.8 MGD (million gallons per day)2022
Haverhill Sewerage Collection System and WWTFHaverhill18.1 MGD (million gallons per day)2022
Brockton Sewerage Collection System and WWTFBrockton18 MGD (million gallons per day)2022
Holyoke Sewerage Collection System and WPCFHolyoke17.5 MGD (million gallons per day)2022
Chicopee Sewerage Collection System and WPCFChicopee15.5 MGD (million gallons per day)2022
Fitchburg Sewerage Collection System and WWTFFitchburg12.4 MGD (million gallons per day)2022
Pittsfield Sewerage Collection System and WPCFPittsfield11.3 MGD (million gallons per day)2022
Attleboro Sewerage Collection System and WWTFAttleboro9.69 MGD (million gallons per day)2022
Northampton Sewerage Collection System and WWTFNorthampton8.65 MGD (million gallons per day)2022
Taunton Sewerage Collection System and WWTFTaunton8.4 MGD (million gallons per day)2022
Westborough Sewerage Collection System and WWTFWestborough7.89 MGD (million gallons per day)2022
Amherst Sewerage Collection System and WWTFHadley7.1 MGD (million gallons per day)2022
Leominster Sewerage Collection System and WWTFLeominster7.1 MGD (million gallons per day)2022
Webster Sewerage Collection System and WWTFWebster6 MGD (million gallons per day)2022
Hoosac Water Pollution Control FacilityWilliamstown5.4 MGD (million gallons per day)2022
Charles River Water Pollution Control FacilityMedway5.35 MGD (million gallons per day)2022
Gloucester Sewerage Collection System and WPCFGloucester5.155 MGD (million gallons per day)2022
South Hadley Sewerage Collection System and WWTFSouth Hadley5.1 MGD (million gallons per day)2022
Fairhaven Sewerage Collection System and WPCFFairhaven5 MGD (million gallons per day)2022
Gardner Sewerage Collection System and WPCFEast Templeton5 MGD (million gallons per day)2022
Dartmouth Sewerage Collection System and WPCFSouth Dartmouth4.92 MGD (million gallons per day)2022
Billerica Sewerage Collection System and WWTFBillerica4.46 MGD (million gallons per day)2022
Milford Sewerage Collection System and WWTFHopedale4.3 MGD (million gallons per day)2022
Barnstable Sewerage Collection System and WWTFBarnstable4.2 MGD (million gallons per day)2022
Marlborough (Westerly) Sewerage Collection System and WWTPMarlborough4.15 MGD (million gallons per day)2022
Somerset Sewerage Collection System and WPCFSomerset4.14 MGD (million gallons per day)2022
Adams Sewerage Collection System and WWTFAdams4.14 MGD (million gallons per day)2022
Mansfield (MFN) Sewerage Collection System and WWTFNorton4.14 MGD (million gallons per day)2022
Nantucket Sewerage Collection System and WWTFNantucket4 MGD (million gallons per day)2022
Westfield Sewerage Collection System and WWTFWestfield3.8 MGD (million gallons per day)2022
Easthampton Sewerage Collection System and WWTFEasthampton3.8 MGD (million gallons per day)2022
Southbridge Sewerage Collection System and WWTFSouthbridge3.77 MGD (million gallons per day)2022
Rockland Sewerage Collection System and WWTFRockland3.5 MGD (million gallons per day)2022
Greenfield Sewerage Collection System and WPCFGreenfield3.4 MGD (million gallons per day)2022
Newburyport Sewerage Collection System and WPCFNewburyport3.4 MGD (million gallons per day)2022
North Attleborough Sewerage Collection System and WWTFNorth Attleboro3.39 MGD (million gallons per day)2022
Hull Sewerage Collection System and WPCFHull3.07 MGD (million gallons per day)2022
MWRA Clinton WWTFClinton3 MGD (million gallons per day)2022
Hudson Sewerage Collection System and WPCFHudson3 MGD (million gallons per day)2022
Erving Sewerage Collection System and WWTFsErving2.7 MGD (million gallons per day)2022
Athol Sewerage Collection System and WWTFAthol2.48 MGD (million gallons per day)2022
Grafton Sewerage Collection System and WWTFGrafton2.4 MGD (million gallons per day)2022
Palmer Sewerage Collection System and WPCFPalmer2.34 MGD (million gallons per day)2022
Amesbury Sewerage Collection System and WWTFAmesbury2.26 MGD (million gallons per day)2022
Marshfield Sewerage Collection System and WWTFMarshfield2.1 MGD (million gallons per day)2022
Wareham Sewerage Collection System and WPCFWareham2 MGD (million gallons per day)2022
Northbridge Sewerage Collection System and WWTFNorthbridge2 MGD (million gallons per day)2022
Montague Sewerage Collection System and WPCFMontague1.83 MGD (million gallons per day)2022
Ipswich Sewerage Collection System and WWTFIpswich1.8 MGD (million gallons per day)2022
Ayer Sewerage Collection System and WWTFAyer1.79 MGD (million gallons per day)2022
Scituate Sewerage Collection System and WPCFScituate1.6 MGD (million gallons per day)2022
Plymouth Sewerage Collection System and WWTFPlymouth1.55 MGD (million gallons per day)2022
Medfield Sewerage Collection System and WWTFMedfield1.52 MGD (million gallons per day)2022
Uxbridge Sewerage Collection System and WWTFUxbridge1.51 MGD (million gallons per day)2022
Warren Sewerage Collection System and WWTFWest Warren1.5 MGD (million gallons per day)2022
Middleborough Sewerage Collection System and WPCFMiddleboro1.48 MGD (million gallons per day)2022
Maynard Sewerage Collection System and WPCFMaynard1.45 MGD (million gallons per day)2022
Bridgewater Sewerage Collection System and WWTFBridgewater1.44 MGD (million gallons per day)2022
Pepperell Sewerage Collection System and WWTFPepperell1.35 MGD (million gallons per day)2022
Chatham Sewerage Collection System and WWTFChatham1.32 MGD (million gallons per day)2022
Sturbridge Sewerage Collection System and WWTFSturbridge1.3 MGD (million gallons per day)2022
Salisbury Sewerage Collection System and WWTFSalisbury1.3 MGD (million gallons per day)2022
Concord Sewerage Collection System and WWTFConcord1.2 MGD (million gallons per day)2022
Great Barrington Sewerage Collection System and WWTFGreat Barrington1.2 MGD (million gallons per day)2022
Lenox Sewerage Collection System and WWTFLenox Dale1.18 MGD (million gallons per day)2022
Winchendon Sewerage Collection System and WPCFWinchendon1.1 MGD (million gallons per day)2022
Spencer Sewerage Collection System and WWTFSpencer1.08 MGD (million gallons per day)2022
Orange Sewerage Collection System and WWTFOrange1.04 MGD (million gallons per day)2022
Ware Sewerage Collection System and WWTFWare1 MGD (million gallons per day)2022
Belchertown Sewerage Collection System and WWTFBelchertown1 MGD (million gallons per day)2022
Lee Sewerage Collection System and WPCFLee0.86 MGD (million gallons per day)2022
Deerfield Sewerage Collection System and WWTFsDeerfield0.85 MGD (million gallons per day)2022
Rockport Sewerage Collection System and WWTFRockport0.8 MGD (million gallons per day)2022
North Brookfield Sewerage Collection System and WWTPNorth Brookfield0.76 MGD (million gallons per day)2022
Edgartown Sewerage Collection System and WWTFEdgartown0.75 MGD (million gallons per day)2022
Kingston Sewerage Collection System and WWTFKingston0.725 MGD (million gallons per day)2022
Falmouth Sewerage Collection System and WWTFNorth Falmouth0.71 MGD (million gallons per day)2022
Hopedale Sewerage Collection System and WWTFHopedale0.69 MGD (million gallons per day)2022
Provincetown Sewerage Collection System and WWTFProvincetown0.65 MGD (million gallons per day)2022
Douglas Sewerage Collection System and WWTFDouglas0.6 MGD (million gallons per day)2022
Templeton Sewerage Collection System and WWTFBaldwinville0.6 MGD (million gallons per day)2022
Marion Sewerage Collection System and WPCFMarion0.59 MGD (million gallons per day)2022
Hadley Sewerage Collection System and WWTFHadley0.54 MGD (million gallons per day)2022
Hatfield Sewerage Collection System and WPCFHatfield0.5 MGD (million gallons per day)2022
Sunderland Sewerage Collection System and WWTFSunderland0.5 MGD (million gallons per day)2022
Manchester-By-The-Sea Sewerage Collection System and WWTFManchester0.5 MGD (million gallons per day)2022
Rochdale Sewerage Collection System and WPCF (Leicester)Oxford0.5 MGD (million gallons per day)2022
Stockbridge Sewerage Collection System and WWTFStockbridge0.49 MGD (million gallons per day)2022
Cohasset Sewerage Collection System and WWTFCohasset0.45 MGD (million gallons per day)2022
Merrimac Sewerage Collection System and WWTFMerrimac0.45 MGD (million gallons per day)2022
Charlton Sewerage Collection System and WWTFCharlton0.45 MGD (million gallons per day)2022
Upton Sewerage Collection System and WWTFUpton0.4 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.