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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
COLUMBUS WWTPHW:391684,684 population served2012
BUCHANAN STPHW:310434,681 population served2012
DAUPHIN ISLAND WWTPHW:251234,678 population served2012
HAZELHURST POTW ACTIVATED SLUDGEHW:314994,678 population served2012
PROVIDENCEHW:300364,676 population served2012
WILTON W P C FHW:304564,676 population served2012
FIREBAUGH WWTFHW:260054,666 population served2012
HOT SPRINGS REGSTPHW:384744,664 population served2012
Hamilton V WWTPHW:339284,659 population served2012
IRCUD_North Reg WWTFHW:267734,658 population served2012
WATONGA WWTHW:357334,658 population served2012
BROWN TWP REEDSVILLE STPHW:365694,658 population served2012
SULTAN SEWER SYSTEMHW:386534,655 population served2012
GUNNISON CENTERFIELD LAGOONHW:382064,652 population served2012
PHILOMATH WWTPHW:361674,650 population served2012
Barling WWTPHW:257334,649 population served2012
West Milton WWTP and Sewer SystemHW:354984,645 population served2012
SHENANGO TWP STPHW:369224,644 population served2012
MARY ESTHER WWTPHW:268344,642 population served2012
ROYERSFORD BORO STP and CSHW:369884,642 population served2012
CLINTONVILLE WWTPHW:391594,641 population served2012
Ocean Beach V STPHW:335594,638 population served2012
WHITEVILLE STPHW:375414,638 population served2012
Lake George V STPHW:338144,635 population served2012
Crestline WWTP and Sewer SystemHW:350654,630 population served2012
MOSHEIM WWTPHW:375454,630 population served2012
LOUISVILLE POTW SOUTHHW:315274,628 population served2012
Nashville WWTPHW:256294,627 population served2012
JEFFERSON WWTPHW:287664,626 population served2012
REMINGTON REGIONAL STPHW:384764,626 population served2012
NESQUEHONING BORO STPHW:363434,623 population served2012
MCCORMICK WWT PLNTHW:371154,620 population served2008
CHARITON WWTPHW:285594,616 population served2012
SALEM WWTPHW:323024,614 population served2012
FAYETTE WWTPHW:250254,612 population served2012
Cambridge Oakland WW CommissionHW:396424,609 population served2012
PECULIAR WWTPHW:319164,608 population served2012
Waverly V STPHW:339624,607 population served2012
Sheridan WWTPHW:255624,603 population served2012
SISSONVILLE WWTPHW:388894,602 population served2012
ONEONTA WWTPHW:252044,600 population served2012
PAGOSA SPRINGS WWTPHW:262864,600 population served2012
MARSEILLES STPHW:279684,600 population served2012
POCOMOKE CITY WWTPHW:306484,600 population served2012
Newfane T WWTP and OnsitesHW:341004,600 population served2012
Wichita Falls Northside WWTPHW:378814,600 population served2012
FT CHISWELL STP and COLL SYSHW:385224,600 population served2012
ASHLAND WWTPHW:385084,597 population served2012
POLSON WWTPHW:325374,593 population served2012
Comerio WWTPHW:397834,590 population served2012
BATTLE MOUNTAIN STPHW:331254,586 population served2012
Toho Cypress West WRFHW:269634,585 population served2012
BUFFALO WWTPHW:396944,585 population served2012
BOILING SPRINGS WWTPHW:341904,584 population served2012
Newcomerstown WWTP and SewersHW:352964,581 population served2012
L ANSE WWTPHW:311364,580 population served2012
JENNER AREA BOSWELL STPHW:364984,580 population served2012
NEW WHITELAND WWTPHW:280054,579 population served2012
Highland Falls V Sewers and STPHW:336124,578 population served2012
PITTSFIELD MAIN PLANTHW:275514,576 population served2012
Ipswich Dept of Public WorksHW:307044,576 population served2012
NEGAUNEE STPHW:311224,576 population served2012
LEADVILLE WWTPHW:263064,575 population served2012
MT VERNON WWTPHW:324564,575 population served2012
HOUTZDALE BORO STPHW:368914,573 population served2012
POTOSI WWTPHW:322814,570 population served2012
SANDERSVILLE WPCPHW:272834,568 population served2012
WILKESBORO CUB CRK WWTPHW:344384,567 population served2012
VENETA STPHW:360594,561 population served2012
WAUCHULA STPHW:269244,560 population served2012
COLBY WWTPHW:297434,558 population served2012
BOONE CO PSD LITTLE COAL RIVER TPHW:388084,555 population served2012
HARLAN STPHW:299784,550 population served2012
WASHINGTON WPCPHW:273134,549 population served2012
MOUNT VERNON WWTPHW:289044,549 population served2012
Erwin T STP and Onsite SystemsHW:340144,546 population served2012
SISTER BAY WWTPHW:394484,543 population served2012
Catskill V WWTPHW:337564,542 population served2012
STONEWALL JACKSON LAKE SP WWTPHW:388954,535 population served2012
BAR HARBOR STPHW:304034,527 population served2012
Genoa WWTP and Sewer SystemHW:351424,524 population served2012
SMETHPORT STPHW:369314,521 population served2012
Bonne Terre NE WWTPHW:322084,519 population served2012
CHESTERTOWN WWTPHW:306074,512 population served2012
Wellington WWTP and Sewer SystemHW:354894,511 population served2012
Brentwood Regional WWTFHW:269924,510 population served2012
NORWAY WASTEWATER PLANTHW:311114,510 population served2012
BLAIRSVILLE STPHW:367764,507 population served2012
MILLINOCKET WWTFHW:304364,506 population served2012
ALTUS SW WWTHW:355424,503 population served2012
NORTH BREWTON LAGOONHW:249934,500 population served2012
JEA Julington Creek WWTFHW:266624,500 population served2012
WAKULLA COUNTY STPHW:270044,500 population served2012
SPRING HILL WWTP 2HW:295104,500 population served2012
HWEA OAK GROVE WTPHW:300854,500 population served2012
CARENCRO MANOLO ST PLANTHW:301184,500 population served2012
Mingo Junction WWTP and Sewer SystemHW:352824,500 population served2012
Trumbull Co Brookfield SD 1 and 2HW:354554,500 population served2012
FRANKLIN TWP GREENE STPHW:367644,500 population served2012
ASHLAND CITY WWTPHW:373144,500 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.