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

Wastewater treatment plants in the United States

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14,626 inventory records · HydroWASTE v1.0 / United States

Data years: 2008, 2012. The inventory date does not establish current operation.

States

14,626 results

CompareNameNative sizeYear
Plum Creek WWTPHW:377262,450 population served2012
FERRUM STPHW:383592,450 population served2012
San Andreas Sanitary District WWTPHW:260692,449 population served2012
KNIGHTSTOWN STPHW:282702,445 population served2012
WEST RUTLAND WPCFHW:382842,445 population served2012
LAMONI WWTPHW:287912,444 population served2012
Ransom Canyon WWTPHW:381132,442 population served2012
DARLINGTON WWTPHW:391792,442 population served2012
ANTHONY WWTPHW:293022,440 population served2012
HAWARDEN STPHW:287372,439 population served2012
JACKSON STP and CSHW:299912,439 population served2012
Brilliant Water and Sewer DistrictHW:350032,438 population served2012
CHASE CITY REGIONAL STPHW:383502,438 population served2012
FREEBURG WEST NO 2HW:276342,436 population served2012
FILLMOREHW:381172,435 population served2012
Savannah TRAVIS FIELD WPCPHW:270422,434 population served2012
FENNIMORE STPHW:392172,432 population served2012
TYLERTOWN POTWHW:316342,431 population served2012
HERMANN WWTPHW:324332,431 population served2012
HORACE LAGOONHW:344552,430 population served2012
LONDON GROVE WWTP and Spray FieldsHW:362492,430 population served2012
ERATH WWCTSHW:303282,428 population served2012
Fredericktown WWTP and Sewer SystemHW:351122,428 population served2012
RISING SUN WWTPHW:283322,427 population served2012
Dillonvale_Mount Pleasant WWSD WWTP and SewersHW:350752,427 population served2012
Owego T SD No1 WWTP and OnsitesHW:339592,425 population served2012
NORTHEAST HARBOR STPHW:304372,424 population served2012
MARKEY TWP WWTFHW:308492,424 population served2012
NORTHWESTERN LANCASTER CO AUTHHW:363752,422 population served2012
BRONSON WWTFHW:311002,421 population served2012
CAVELAND ENV AUTH HORSE CAVE STPHW:299842,420 population served2012
CUMBERLAND TWP SOUTH STPHW:364832,420 population served2012
MINONK STPHW:277042,419 population served2012
MADRID WWTPHW:288432,418 population served2012
ENFIELD WWTPHW:342542,418 population served2012
FORT FAIRFIELD WWTFHW:304212,417 population served2012
Bradford WWTP and Sewer SystemHW:349982,417 population served2012
WORTHINGTON WWTPHW:282612,415 population served2012
HARDINSBURG STPHW:299032,415 population served2012
DREW POTWHW:314592,415 population served2012
Earle WWTPHW:255372,414 population served2012
BEAVER LAKE HOMEOWNERS ASSOCHW:329482,413 population served2012
CECIL TWP MILLERS RUN STPHW:367942,413 population served2012
HAZEN LAGOONHW:346002,411 population served2012
Danville WWTPHW:255952,409 population served2012
CLAYSVILLE DONEGAL STPHW:367472,408 population served2012
WINSTED STPHW:313412,407 population served2012
CARLISLE CO REG STPHW:298962,405 population served2012
PEQUOT LAKES STPHW:313452,405 population served2012
MILAN COLL SYSTEMHW:334782,405 population served2012
BRIDGEPORT WWTPHW:386902,405 population served2012
Marana High School WWTPHW:253592,400 population served2012
MONTALVO WWTFHW:259582,400 population served2012
Otter Creek Lake Utility DistrictHW:278452,400 population served2012
Bullitt County Sanitation District Hillview 2HW:298452,400 population served2012
NORTONVILLE WWTPHW:299172,400 population served2012
St Mary SD 5HW:303142,400 population served2012
Jackson POTW Presidential HillsHW:316782,400 population served2012
Greenport V STPHW:335562,400 population served2012
HEMINGWAY WWTPHW:370952,400 population served2008
WAVERLY WWTPHW:375352,400 population served2012
Crandall WWTPHW:378482,400 population served2012
ALEDO STPHW:378672,400 population served2012
Crockett WWTP 2HW:379702,400 population served2012
HALL CREEK WWTP and COLLECTION SYSHW:384282,400 population served2012
Gorham WWTFHW:332342,398 population served2012
Pulaski V WWTPHW:339552,398 population served2012
WAVERLY STPHW:383902,398 population served2012
GREENSBURG STPHW:299762,396 population served2012
FLORENCE POTWHW:314752,396 population served2012
LUVERNE LAGOONHW:251932,395 population served2012
MORGANTOWNHW:300182,394 population served2012
Gambier WWTP and Sewer SystemHW:349572,391 population served2012
ATHENS WWTPHW:389252,391 population served2012
FREEPORT WWTFHW:304642,390 population served2012
PRENTISS POTWHW:315822,390 population served2012
ROSEDALE POTWHW:315962,390 population served2012
DENTON WWTPHW:342092,390 population served2012
DAYTON STPHW:361102,390 population served2012
Wolfforth WWTPHW:376962,390 population served2012
MONROE CITY WWTPHW:317782,388 population served2012
Cooper WWTPHW:379162,386 population served2012
POSTVILLE WWTPHW:289742,385 population served2012
WINSLOW TREATMENTHW:387612,385 population served2012
Victor V STPHW:339992,383 population served2012
PRATT WWTPHW:388852,383 population served2012
SCHWENKSVILLE BORO AUTHHW:362392,381 population served2012
Woodsfield WWTP and Sewer SystemHW:355202,380 population served2012
De Cordova Bend WWTPHW:377992,380 population served2012
Jefferson WWTPHW:379272,380 population served2012
REED CITY STPHW:310302,379 population served2012
Leipsic WWTP and Sewer SystemHW:352152,378 population served2012
ITTA BENA POTWHW:315122,377 population served2012
ST GEORGE WWTPHW:371192,376 population served2008
WOODVILLE POTWHW:316612,375 population served2012
Holiday Island SID WWTPHW:254612,373 population served2012
HALSTEAD WWTPHW:294342,373 population served2012
McConnelsville WWTP and Sewer SystemHW:352442,372 population served2012
PLATTEVILLE STPHW:263872,371 population served2012
MESCALERO LAGOONHW:334562,371 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.