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

Wastewater treatment plants in United States · Maryland

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172 inventory records · HydroWASTE v1.0 / United States

Data years: 2012. The inventory date does not establish current operation.

172 results

CompareNameNative sizeYear
Middletown East WWTPHW:305931,197 population served2012
PRINCE FREDERICK WWTP IIHW:306801,193 population served2012
GRANTSVILLE WWTPHW:306031,175 population served2012
POINT OF ROCKS STPHW:305841,103 population served2012
PITTSVILLE WWTPHW:306381,100 population served2012
SWALLOW FALLS STATE PARKHW:306551,000 population served2012
WOODSBORO STPHW:306781,000 population served2012
Twin Cities WWTPHW:30669998 population served2012
Deep Creek Lake State ParkHW:30658968 population served2012
UNION BRIDGE WWTPHW:30539947 population served2012
Swan Point WWTPHW:30576945 population served2012
Willards WWTPHW:30637940 population served2012
Talbot County Region V WWTPHW:30623900 population served2012
Elk Neck State ParkHW:30656900 population served2012
Forest Farm WWTFHW:30614882 population served2012
Cherry Hill WWTPHW:30552800 population served2012
Clifton on the Potomac WWTPHW:30579800 population served2012
Rawlings WWTP and Collection SystemHW:30565750 population served2012
OXFORD WWTPHW:30627750 population served2012
RICHLYN MANOR WWTPHW:30684738 population served2012
HEBRON WWTPHW:30641730 population served2012
Preston WWTPHW:30572719 population served2012
Martingham Wastewater Treatment SystemHW:30625719 population served2012
St Clement s Shores WWTPHW:30613706 population served2012
Charlotte Hall Veterans Home WWTSHW:30692704 population served2012
SHARPTOWN WWTPHW:30643670 population served2012
QUEENSTOWN WWTPHW:30610617 population served2012
Ewell Rhodes Point WWTPHW:30619600 population served2012
NEW GERMANY STATE PARKHW:30657600 population served2012
CHURCH HILL STPHW:30687600 population served2012
FAIRMOUNT STPHW:30620570 population served2012
CLEAR SPRING WWTPHW:30632570 population served2012
Worton_Butlertown STPHW:30604556 population served2012
Friendsville WWTPHW:30602550 population served2012
Mill Bottom WWTSHW:30689550 population served2012
VIENNA WWTPHW:30670548 population served2012
BETTERTON WWTPHW:30674510 population served2012
EASTERN PRERELEASE STPHW:30650497 population served2012
Sudlersville WWTPHW:30688497 population served2012
Barton Business Park WWTPHW:30561490 population served2012
GALENA WWTPHW:30686480 population served2012
CECILTON WWTPHW:30554475 population served2012
Millington_Sandfield WWTPHW:30676470 population served2012
FLINTSTONE GILPIN WWTPHW:30563450 population served2012
Harbor View WWTPHW:30553437 population served2012
OLDTOWN WWTPHW:30564430 population served2012
GORMAN WWTPHW:30600430 population served2012
ASSATEAGUE STATE PARK TPHW:30667425 population served2012
Chesapeake City South STPHW:30556400 population served2012
Bloomington WWTPHW:30601400 population served2012
Chesapeake City North STPHW:30555385 population served2012
ACCIDENT WWTPHW:30672365 population served2012
Jude House Package WWTP Bel Alton WWTPHW:30578345 population served2012
GREENRIDGE FORESTRY CAMPHW:30661304 population served2012
Industrial Park WWTPHW:30681300 population served2012
WHITE ROCK WWTPHW:30588265 population served2012
Kitzmiller WWTSHW:30597250 population served2012
Poplar HillHW:30665250 population served2012
KENNEDYVILLE STPHW:30605234 population served2012
Southern MD Prerelease UHW:30651230 population served2012
Newark STPHW:30645224 population served2012
Cheltenham WWTPHW:30666220 population served2012
Mt Carmel Woods WWTPHW:30577200 population served2012
CRELLIN WWTPHW:30599175 population served2012
TYLERTON WWTPHW:30621173 population served2012
Manchester Park WWTP PrivateHW:30685173 population served2012
SPRING MEADOWS WWTPHW:30542153 population served2012
Pleasant Valley WWTPHW:30534145 population served2012
Sandy Hook WWTPHW:30630145 population served2012
Victor Cullen WWTPHW:30664135 population served2012
Hyattstown WWTPHW:30691105 population served2012
Fort Frederick State ParkHW:30668100 population served2012

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.