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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
SLIPPERY ROCK STPHW:369946,445 population served2012
BROADWATER WWTPHW:305296,444 population served2012
ZUNI PUEBLO LAGOONSHW:334536,434 population served2012
Carbondale Town ofHW:265216,427 population served2012
MILFORD TRUMBAUERSVILLE STPHW:369906,427 population served2012
Buena Borough MUA Septics_CS_STPHW:333266,425 population served2012
Hope Bois D Arc WWTPHW:255676,419 population served2012
DANVILLE WWTPHW:279956,418 population served2012
Guayanilla WWTPHW:397706,418 population served2012
PORT ALLEN STPHW:303396,416 population served2012
FORD CITY STPHW:368426,411 population served2012
MONTEVALLO WWTPHW:250646,400 population served2012
LINCOLN SOUTH WWTPHW:251876,400 population served2012
FERRIDAY NORTH PONDHW:302366,400 population served2012
Saugerties V Sewers and STPHW:336816,400 population served2012
Geneva on the Lake WWTP and SewersHW:348456,400 population served2012
Pickens_12 Mile RV and Wolf CreekHW:371766,400 population served2008
Ripley STPHW:374946,400 population served2012
DeFuniak Springs WWTPHW:269776,398 population served2012
MarlinHW:377876,390 population served2012
PRICHARD STANLEY BROOKS WWTPHW:250886,386 population served2012
NORTH MANCHESTER WWTPHW:281286,383 population served2012
WAPATO STPHW:386756,375 population served2012
Hillsboro WWTP and Sewer SystemHW:351766,368 population served2012
Lake Wildwood WWTPHW:261586,366 population served2012
COLUMBIA POTW SOUTHHW:314326,345 population served2012
BUTLER TWP ST JOHNS STPHW:364376,344 population served2012
EBENSBURG BORO STPHW:365956,343 population served2012
RUSHVILLE WWTPHW:281636,341 population served2012
Lawrence V WWTPHW:335286,337 population served2012
SALISBURY TOWNSHIPHW:363956,335 population served2012
BUFORD SOUTHSIDEHW:270276,332 population served2012
ERWIN STPHW:373786,331 population served2012
HENDERSON LAGOON SOUTHHW:374016,331 population served2012
HENDERSON LAGOON NORTHHW:374026,331 population served2012
EASTANOLLE CREEK WPCPHW:273036,329 population served2012
PRINCETON STPHW:300356,329 population served2012
DCNR SHAWNEE STATE PARK STPHW:369666,325 population served2012
CAMBRIA TWP REVLOC MYLO PARK STPHW:366016,323 population served2012
Marlborough Westerly WWTPHW:307006,321 population served2012
BIXBY PWA SOUTH WWTHW:356696,321 population served2012
Rittman WWTP and Sewer SystemHW:348276,314 population served2012
POWELL LAGOONHW:397086,314 population served2012
HURON WWTFHW:260106,306 population served2012
IOLA WWTPHW:295746,302 population served2012
MONROEVILLE DOUBLE BRANCH WWTPHW:251986,300 population served2012
AVALON WWRFHW:259616,300 population served2012
MILAN SEW TREATMENT PLANTHW:276696,300 population served2012
GLAIZE CREEK WWTPHW:319586,300 population served2012
AHOSKIE WWTPHW:342686,300 population served2012
PRINEVILLE STPHW:361736,300 population served2012
White Oak WWTPHW:379466,300 population served2012
WILDERNESS WWTPHW:385326,300 population served2012
SPRINGFIELD WPCPHW:272946,298 population served2012
Alma WWTPHW:255316,295 population served2012
NEW HOLLAND BORO STPHW:363136,292 population served2012
CONSOLIDATED KOSHKONONG SD STPHW:395336,292 population served2012
ENTERPRISE WWTP 3 SEHW:250216,290 population served2012
ENTERPRISE WWTP 4 NEHW:250226,290 population served2012
Belchertown Sewer DeptHW:308046,289 population served2012
MONACA BORO STPHW:368036,286 population served2012
Milford WWTP and Sewer SystemHW:352776,284 population served2012
PERRY CITYHW:381536,284 population served2012
SIDNEY WWTPHW:330316,282 population served2012
Conway Village WWTFHW:332306,280 population served2012
PAULS VALLEY WWTHW:358036,280 population served2012
KOSCIUSKO POTW SOUTHHW:315176,275 population served2012
MILFORD WWTPHW:309636,272 population served2012
DOUGLAS LAGOONHW:396566,263 population served2012
Cornwall T Joint T_V STPHW:336046,258 population served2012
Atwood Regional WSDHW:350266,258 population served2012
Thompson T Sackett Lake SD STPHW:336676,257 population served2012
LEEDS NORMAN R SKINNER WWTPHW:252406,250 population served2012
Waterway Estates WWTPHW:267956,250 population served2012
JASPER WWTFHW:269206,250 population served2012
Gallipolis WWTP and Sewer SystemHW:351226,244 population served2012
BERKS MONTGOMERY MORYSVILLE STPHW:363236,244 population served2012
SANDY STPHW:360316,240 population served2012
ELY WASTE TREATMENT FACHW:312396,239 population served2012
Erie Co Sawmill Creek WWTPHW:350986,239 population served2012
VACHERIE STPHW:303066,237 population served2012
Pickaway Correctional InstituteHW:353286,237 population served2012
Hopedale Deptof Public WorksHW:307836,226 population served2012
Airway Heights WWTPHW:387806,220 population served2012
Eastman Sugar Cr WPCPHW:270606,208 population served2012
CHANNAHON STPHW:276056,200 population served2012
OAK PARK CDHW:281196,200 population served2012
Waverly WWTP and Sewer SystemHW:354856,200 population served2012
HALLSTEAD GREAT BEND JNT SEW AHW:364406,200 population served2012
SUMMERTON WWTP_LAND APPHW:371056,200 population served2008
STOWE WPCFHW:382806,200 population served2012
PLAINWELL STPHW:311126,197 population served2012
STAR SEWER AND WATER DISTRICTHW:274066,195 population served2012
INDEPENDENCE STPHW:360516,195 population served2012
Union WWTP and Sewer SystemHW:354676,194 population served2012
Quiggs Branch WPCPHW:271696,188 population served2012
BEECH MOUNTAIN_POND CREEK WWTPHW:344276,180 population served2012
SALEM WWTPHW:282176,172 population served2012
South Plant KingsvilleHW:376696,170 population served2012
Walden V Sewers and WWTPHW:336326,164 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.