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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
BROWNSVILLE LAGOONHW:373324,500 population served2012
MOUNT PLEASANT STPHW:374644,500 population served2012
SELMER WWTPHW:375024,500 population served2012
STDSVLE GREENE REG STPHW:383344,500 population served2012
MOUNT OLIVE WWTPHW:344294,494 population served2012
ROCKY FORD SEWAGE LAGOONSHW:262724,486 population served2012
SULLIVAN WWTPHW:280674,482 population served2012
Coldwater WWTP and Sewer SystemHW:349694,482 population served2012
Warsaw V STPHW:341114,480 population served2012
Mineola WWTPHW:379004,480 population served2012
AURORA WWTPHW:330924,479 population served2012
PAXTON STPHW:278674,473 population served2012
DEPOE BAY STPHW:361124,472 population served2012
SEWICKLEY BORO STPHW:367624,468 population served2012
ROSE HILL WWTPHW:298054,467 population served2012
PETERSBURG WWTPHW:311974,464 population served2012
EMMITSBURG WWTPHW:305904,460 population served2012
SAUKVILLE STPHW:394364,459 population served2012
AMERICAN FALLS S_T FACILHW:274934,457 population served2012
GENEVA WWTPHW:251634,452 population served2012
WATERTOWN STPHW:312824,440 population served2012
ESCALON WWTFHW:260664,437 population served2012
MARGARET WWTPHW:250624,428 population served2012
LAWRENCEVILLE STPHW:384504,425 population served2012
MEDFORD WWTPHW:393214,421 population served2012
Wellsville WWTP and Sewer SystemHW:348214,420 population served2012
Sebring WWTP and Sewer SystemHW:354064,420 population served2012
Roseville WWTP and Sewer SystemHW:353854,419 population served2012
DENTON WWTPHW:305694,418 population served2012
Sidney V WWTPHW:337374,418 population served2012
WEST POINT WPCPHW:273154,417 population served2012
STE GENEVIEVE WWTPHW:317674,410 population served2012
UNITY TWP MA PLEASANT UNITY STPHW:367924,407 population served2012
Canastota V STPHW:339264,405 population served2012
SOUTH HAVEN STPHW:310544,403 population served2012
Jamestown WWTP and Sewer SystemHW:351824,403 population served2012
BAXTER SPRINGS WWTPHW:295504,402 population served2012
GLENNVILLE WWTPHW:270644,400 population served2012
OREGON STPHW:278234,400 population served2012
MCCORDSVILLE WWTPHW:279914,400 population served2012
ROCKY BOY LAGOONHW:325544,400 population served2012
Williamson T STP and OnsitesHW:340264,400 population served2012
WILLISTON STPHW:371444,400 population served2008
Sunbury WWTP and Collection SystemHW:354434,389 population served2012
Prairie Grove WWTPHW:257544,380 population served2012
Navarre WWTP and Sewer SystemHW:352914,380 population served2012
KINGFISHER PWA WWTHW:355694,380 population served2012
SYLVANIA WPCPHW:272974,373 population served2012
Guanica WWTPHW:397744,368 population served2012
DWIGHT STPHW:278844,363 population served2012
HAMILTON WWTPHW:325684,363 population served2012
FOREST CITY WWTPHW:286874,362 population served2012
BROADWAY STPHW:384724,361 population served2012
SILVER LAKE SD STPHW:390574,361 population served2012
BEECHER STPHW:275684,359 population served2012
ASBURY WWTPHW:284914,357 population served2012
PAINTSVILLE STPHW:300284,355 population served2012
TINICUM TWP STPHW:362094,353 population served2012
Hermosa SDHW:265194,350 population served2012
Buckley WWTFHW:385454,345 population served2012
CAMDENTON WWTPHW:323384,344 population served2012
POULTNEY WTFHW:382634,344 population served2012
Sag Harbor V WWTPHW:335634,340 population served2012
MC RAE GUM SWAMP CREEKHW:272474,339 population served2012
SULLIVAN STPHW:276184,334 population served2012
FAIRMONT REG WWTPHW:343634,333 population served2012
West Jefferson WWTP and Sewer SystemHW:354954,331 population served2012
SCOTTSVILLEHW:300394,329 population served2012
OCILLA LASHW:270784,325 population served2012
BONNE TERRE NW WWTPHW:322074,325 population served2012
BRISTOW WWTHW:356904,325 population served2012
STONINGTON PAWCATUCK WPCFHW:266044,323 population served2012
Mt Airy WWTPHW:305364,321 population served2012
Shelby Co Lake Loramie WWTPHW:347924,319 population served2012
ST ANTHONY SEWAGE LAGOONHW:273784,317 population served2012
ELDON TREATMENT PLANTHW:317734,317 population served2012
PORTER TOWER JMA STPHW:363474,314 population served2012
KANABHW:381524,312 population served2012
MORRISON STP and COLLECTION SYSTEMHW:276274,307 population served2012
GARDINER WWTFHW:325644,306 population served2012
BURNS STPHW:360964,306 population served2012
Las Animas City of WWTPHW:264494,301 population served2012
Fordyce WWTPHW:255794,300 population served2012
CICERO WWTPHW:279824,300 population served2012
Grant Co San Sewer District WWTPHW:299544,300 population served2012
MARINE CITY STPHW:311104,300 population served2012
Ballinger WWTPHW:380994,300 population served2012
HAWKINSVILLE WPCPHW:272224,299 population served2012
ELIZABETHTOWN WWTPHW:341454,298 population served2012
TUTTLE WWTHW:358084,294 population served2012
Vieques WWTPHW:397894,291 population served2012
BROKEN BOW WWTPHW:327064,290 population served2012
BROKEN BOW PWA WWTHW:355714,290 population served2012
DRIGGS S_T FACILITYHW:274944,288 population served2012
RUTHERFORDTON WWTPHW:343774,287 population served2012
LIGONIER WWTPHW:281704,286 population served2012
TANEYTOWN STPHW:305384,285 population served2012
CENTREVILLE WWTPHW:306114,285 population served2012
Huntingdon Hwy 22 LagoonHW:374074,285 population served2012
GRAFTON LAGOONHW:344694,284 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.