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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
PALMYRA WWTPHW:320023,371 population served2012
GRANITE FALLS STPHW:385833,370 population served2012
Sherrill C STPHW:338703,367 population served2012
MAIDEN WWTPHW:341743,367 population served2012
WILLOW SPRINGS WWTPHW:317763,366 population served2012
HAYTI AERATED WWT LAGOONHW:317723,365 population served2012
CHESTNUT RIDGE AREA JMA STPHW:370353,365 population served2012
MIDDLEBURY WWTPHW:282433,364 population served2012
ALGOMA WWTPHW:390673,362 population served2012
SURF CITY WWTPHW:343443,361 population served2012
CITRONELLE WWTPHW:250063,360 population served2012
NORTH LEBANON JONESTOWN STPHW:363303,360 population served2012
Turkey Creek WWTP BryanHW:377533,360 population served2012
FRANKLIN COUNTY WWTPHW:342323,356 population served2012
TOLEDO STPHW:360753,356 population served2012
CUMBERLAND GAP WWTPHW:373603,356 population served2012
WINNER LAGOONHW:372833,354 population served2012
HOLTON WWTPHW:293643,353 population served2012
North Baltimore WWTP and Sewer SystemHW:353173,351 population served2012
Monticello East WWTPHW:255523,350 population served2012
METTER LASHW:270753,350 population served2012
BUCK CREEK WPCPHW:271493,350 population served2012
HOGANSVILLE WPCPHW:272273,350 population served2012
Manila WWTPHW:256863,342 population served2012
CROSS PLAINS STPHW:391743,341 population served2012
St Johns WWTPHW:252733,340 population served2012
BOONSBORO WWTPHW:306313,336 population served2012
Timber Ridge WWTPHW:380213,335 population served2012
PARK FALLS WWTPHW:393813,335 population served2012
FARMERVILLE STPHW:303253,334 population served2012
DANIEL ISLAND WWTPHW:371943,333 population served2008
WEST LIBERTY WWTPHW:291323,332 population served2012
Akron V WWTP and CollectionHW:340793,332 population served2012
KINZUA WARREN CLARENDON BORO STPHW:369603,325 population served2012
CHILDERSBURG BAILEY BR LAGOONHW:250043,323 population served2012
NEW HOLSTEIN WWTPHW:393543,322 population served2012
BREAKNECK CREEK REGIONAL STPHW:367433,316 population served2012
Mount Orab WWTP and Sewer SystemHW:352873,315 population served2012
HAWTHORNE WWTFHW:331353,313 population served2012
DEXTER TREATMENT PLANTHW:304153,312 population served2012
MOMENCE STPHW:279553,310 population served2012
Lancaster WWTFHW:331653,310 population served2012
BURLINGTON WWTPHW:263053,309 population served2012
Cadiz WWTP and Sewer SystemHW:350153,308 population served2012
Baltimore WWTP and Sewer SystemHW:349753,307 population served2012
Swanton WWTP and Sewer SystemHW:354453,307 population served2012
CURWENSVILLE STPHW:368613,305 population served2012
HAVANA STPHW:278923,301 population served2012
CARRABELLE STPHW:269143,300 population served2012
Effingham CountyHW:273333,300 population served2012
WAILUA WWTFHW:273533,300 population served2012
Northport V WWTP and On Site SysHW:335583,300 population served2012
Carrollton WWTP and Sewer SystemHW:350273,300 population served2012
Oliver Springs WWTPHW:374813,300 population served2012
Caldwell WWTPHW:377673,300 population served2012
Winnsboro WWTPHW:379453,300 population served2012
BLUE EARTH STPHW:313203,299 population served2012
TONKAWA MA WWTHW:358563,299 population served2012
Prescott WWTPHW:256933,296 population served2012
DeWitt WWTPHW:254693,292 population served2012
BETHANY WWTPHW:322103,292 population served2012
PADDOCK LAKE STPHW:393783,292 population served2012
Mount Gilead WWTP and Sewer SystemHW:349063,290 population served2012
Calera Northside WWTP Camp BranchHW:249963,287 population served2012
BUCKS CO WandS AUTH KING S PLAZA STPHW:362203,285 population served2012
MIDWAY STPHW:367973,285 population served2012
CLEVELAND WWTHW:359423,282 population served2012
GARNETT WWTP South SiteHW:294853,280 population served2012
WEST LIBERTYHW:299163,277 population served2012
STILWELL ADA WWTHW:355723,276 population served2012
Brazoria WWTPHW:379823,276 population served2012
MANTIHW:381383,276 population served2012
PHILIPPI WWTPHW:387863,275 population served2012
CHESTER WWTPHW:388543,273 population served2012
MT MORRIS STPHW:278223,272 population served2012
GRANGER POTWHW:385823,270 population served2012
MOUNTAIN VIEW WWTPHW:320743,269 population served2012
HERCULANEUM WWTPHW:318843,268 population served2012
Minoa V WWTPHW:339413,268 population served2012
SPRING GREEN WWTPHW:394573,263 population served2012
DUTCHMAN CREEK MOCKSVILLE WWTPHW:342123,262 population served2012
Woodstown Borough CS_Septics_STPHW:333393,260 population served2012
Cowpens_Pacolet River PlantHW:371223,260 population served2008
MOUNT CARMEL WWCSHW:374633,260 population served2012
MT PLEASANTHW:381223,260 population served2012
JACKSON STPHW:313253,259 population served2012
SALIDA TRTMNT PLANTHW:260783,257 population served2012
EAST VINCENT TWP MUN AUTHHW:362413,257 population served2012
EUTAW LAGOONHW:250233,250 population served2012
MOULTON WWTPHW:250693,250 population served2012
N Hutchinson Island WWTFHW:268773,250 population served2012
FREEPORT WWTPHW:269863,250 population served2012
CASEY N WASTEW TRT PLANTHW:276883,250 population served2012
MCCREARY CO WDHW:300803,250 population served2012
Clermont Co Wards Corners WWTPHW:350483,250 population served2012
WINNSBORO JACKSON CR WWTPHW:371453,250 population served2008
Lost Creek WWTPHW:378153,250 population served2012
RANDOLPH WPCFHW:382983,245 population served2012
Greenport T STP and On SitesHW:337103,240 population served2012
Bellville WWTPHW:380323,240 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.