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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
VEEDERSBURG WWTPHW:282493,018 population served2012
KELLEY LAND SUBDHW:303623,017 population served2012
EATONTON EAST WPCPHW:271263,015 population served2012
DELPHI WWTPHW:282153,015 population served2012
Suffolk Co SCSD7 Medford W STPHW:335433,010 population served2012
INARAJAN DISTRICT WWTFHW:397423,010 population served2012
MARION WWTPHW:250633,006 population served2012
BONDURANT WWTPHW:285263,005 population served2012
Belmont Co Fox Shannon WWTPHW:349903,005 population served2012
NEKOOSA WWTPHW:393493,005 population served2012
PETERSBURG WWTPHW:283403,004 population served2012
PORT ALLEGANY STPHW:368583,004 population served2012
GALENA WWTPHW:295683,002 population served2012
Barrow County Barber Cr WPCPHW:273383,001 population served2012
GLADWIN TREATMENT PLANTHW:311013,001 population served2012
HANCEVILLE WWTPHW:251743,000 population served2012
Williams WWTFHW:252873,000 population served2012
Taylor WWTFHW:253503,000 population served2012
West Point STPHW:260273,000 population served2012
Forest Meadows STPHW:260343,000 population served2012
BASALT WWTPHW:263013,000 population served2012
BACA GRANDE WSDHW:264273,000 population served2012
SOUTH DURANGO SDHW:264343,000 population served2012
BEACON FALLS WPCFHW:265343,000 population served2012
HAMMONASSETT PARK WPCFHW:266193,000 population served2012
SNEADS STPHW:267773,000 population served2012
Silver Springs Regional WRFHW:268113,000 population served2012
WAIMEA WWTF KauaiHW:273543,000 population served2012
BYRON STPHW:275773,000 population served2012
EAST DUNDEE STPHW:277553,000 population served2012
TWIN LAKES RSD WWTPHW:280113,000 population served2012
LA GRANGE WWTPHW:283073,000 population served2012
JENKINS STPHW:298903,000 population served2012
EMINENCE STPHW:298923,000 population served2012
GRAMERCY STPHW:303053,000 population served2012
INDEPENDENCE PONDHW:303163,000 population served2012
FOUNTAINDALE WWTPHW:305873,000 population served2012
Mystic Harbour WWTPHW:306463,000 population served2012
Barre Board of Sewer CommissionersHW:307683,000 population served2012
POPLAR WWTPHW:325733,000 population served2012
BIG SKY CO WandS DISTHW:326053,000 population served2012
CENTRAL CITY WWTPHW:327363,000 population served2012
Highlands T Fort Montgomery STPHW:336133,000 population served2012
NEUSE RIVER WandS DIST WWTPHW:341963,000 population served2012
Fairfield Co Sycamore Creek WRFHW:348103,000 population served2012
WILBURTON PWA WWTHW:358663,000 population served2012
MCLOUD PWA WWTHW:359613,000 population served2012
EASTERN YORK STP HELLAMHW:365613,000 population served2012
CENTRAL BERKELEY WWTPHW:371893,000 population served2008
Adamsville LagoonHW:373103,000 population served2012
WHITE BLUFF WWTPHW:375393,000 population served2012
Dublin WWTPHW:377733,000 population served2012
WINTERGREEN MOUNTAIN STPHW:385193,000 population served2012
ZILLAH TREATMENTHW:386843,000 population served2012
BARBOURSVILLE WWTPHW:388183,000 population served2012
LOGAN WWTPHW:389003,000 population served2012
BRILLION STPHW:391253,000 population served2012
MADELINE SD STPHW:395623,000 population served2012
YOUNTVILLE VETERANS WWTFHW:258822,999 population served2012
EAST PROSPECT STPHW:365242,999 population served2012
ONAWA WWTPHW:289362,998 population served2012
TIPTON WWTP WestHW:290822,998 population served2012
FAIRMOUNT STPHW:282542,996 population served2012
Clifton WWTFHW:252972,995 population served2012
SHICKSHINNY BORO STPHW:364352,994 population served2012
PINCKNEYVILLE STP 1HW:279022,993 population served2012
DERRY BOROUGH STPHW:367852,991 population served2012
CLINTWOOD STPHW:383192,991 population served2012
Hardwick WPCFHW:307922,990 population served2012
GUILFORD SANGERVILLE WWTFHW:304232,988 population served2012
BROWNSTOWN WWTPHW:282782,986 population served2012
CHATSWORTH WPCPHW:271622,984 population served2012
WINDSOR WWTPHW:341412,984 population served2012
Trimble Township WWT DistrictHW:347452,982 population served2012
Caslon WWTPHW:283942,981 population served2012
DAWSON SPRINGSHW:299562,981 population served2012
Loudonville WWTP and Sewer SystemHW:349252,981 population served2012
BIGFORK COUNTY WATER and SEWER DISHW:325912,980 population served2012
Clayton Town ofHW:335202,980 population served2012
PETERSBURG STPHW:278572,973 population served2012
COALGATE PWA WWTHW:357632,973 population served2012
FOWLERVILLE WWSLHW:310972,972 population served2012
HALLS WWTPHW:373962,971 population served2012
LOGAN CO PSD WWTPHW:389022,971 population served2012
SHELBY POTWHW:316082,970 population served2012
MOUNT HOLLY SPRINGS STPHW:365382,970 population served2012
WEST GROVE BORO STPHW:362862,968 population served2012
MOUNTAIN GROVE WWTP EASTHW:324622,964 population served2012
MINDEN WWTPHW:329362,964 population served2012
Mercer Co Montezuma_Club Island SDHW:355292,962 population served2012
PELAHATCHIE POTWHW:315712,961 population served2012
CUMBERLAND WWTPHW:391762,961 population served2012
Cottonwood WWTPHW:261212,960 population served2012
ROBERSONVILLE WWTPHW:343062,960 population served2012
WEED WWTFHW:258152,959 population served2012
STORY CITY WWTPHW:290642,959 population served2012
LINN WWTPHW:321952,959 population served2012
MARION STPHW:300102,956 population served2012
Jal City ofHW:334422,956 population served2012
BINGEN POTWHW:386882,955 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.