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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
TUSCOLA NORTH WWTPHW:278164,279 population served2012
CALIFORNIA SOUTH WWTFHW:322224,278 population served2012
Medfield Sewer CommissionHW:307844,275 population served2012
Hebronville WWTPHW:376514,270 population served2012
CASTLETON WPCFHW:382364,268 population served2012
BLUEFIELD ADA WWTPHW:389264,267 population served2012
PIEDMONT LAGOONHW:252064,265 population served2012
CAMDEN WPCFHW:304774,265 population served2012
SCOTT CITY WWTPHW:321034,265 population served2012
BRIDGEVILLE STPHW:266254,263 population served2012
Gouverneur V WWTPHW:338784,263 population served2012
FAIRBURY WWTPHW:327984,262 population served2012
PRESCOTT WWTPHW:394064,255 population served2012
Harbor Road WWTFHW:267484,250 population served2012
CUTHBERT PONDHW:270584,249 population served2012
Lonoke WWTPHW:256754,245 population served2012
ELBURN WWTPHW:277464,243 population served2012
Rockport North WWTPHW:284344,242 population served2012
SCHUYLER WWTPHW:330194,241 population served2012
SOUTHEAST BRUNSWICK SD WWTPHW:341564,238 population served2012
COLD SPRING STPHW:312694,235 population served2012
LIBERTY WWTPHW:281784,234 population served2012
ELEANOR WWTPHW:389814,233 population served2012
New Lebanon WWTP and Sewer SystemHW:353004,231 population served2012
SEWANEE WWTPHW:375044,228 population served2012
Chino ValleyHW:252964,225 population served2012
SEA TRAILS WWTPHW:341534,225 population served2012
Barnesville WWTP and Sewer SystemHW:349774,225 population served2012
FREMONT STPHW:308794,224 population served2012
GROVETOWN LASHW:270654,222 population served2012
Blanchester WWTP and Sewer SystemHW:349384,220 population served2012
McGehee WWTPHW:255474,219 population served2012
BUTLER WWTPHW:321634,219 population served2012
HAMPTON WWTPHW:287284,218 population served2012
CHETEK STPHW:391524,217 population served2012
CARVER STPHW:312794,216 population served2012
TROY WWTPHW:343154,205 population served2012
Eagar WWTPHW:252714,200 population served2012
CORYDON STPHW:282644,200 population served2012
CAMANCHE WWTPHW:285454,200 population served2012
WAMEGO WWTPHW:294084,200 population served2012
BENTON STPHW:301114,200 population served2012
FranklintonHW:303814,200 population served2012
PERRYVILLE WWTPHW:305584,200 population served2012
MONTGOMERY CO MA EUREKA STPHW:362264,200 population served2012
BJWSA_ Marine Corps Air StationHW:372784,200 population served2008
Bull Hide Creek WWTPHW:377414,200 population served2012
WEST ORANGE STPHW:379584,200 population served2012
MINERAL WELLS PSDHW:390414,200 population served2012
ROSCOMMON TWP WWTFHW:308514,199 population served2012
KITTANNING BORO STPHW:367494,195 population served2012
Lake of the Pines WWTPHW:261494,192 population served2012
CLARE WWTPHW:311064,192 population served2012
SMITHVILLE STPHW:375084,189 population served2012
BUFFALO CREEK PSD WWTPHW:388994,189 population served2012
MOSINEE WWTPHW:393424,189 population served2012
IMPERIAL WWTFHW:261934,188 population served2012
FAYETTE WWTPHW:323854,188 population served2012
GRAND VALLEY COLLEGE STPHW:309024,181 population served2012
South Hutchinson Island WWTFHW:269824,180 population served2012
RICHMOND N WWTPHW:319854,179 population served2012
EATON RAPIDS WWTPHW:308254,178 population served2012
BAY RIVER BAYBORO MSD WWTPHW:343414,178 population served2012
Lyons V WWTPHW:340194,176 population served2012
Gateway Services District 1 STPHW:267934,175 population served2012
LIVINGSTON STPHW:374364,175 population served2012
North Bay WWTPHW:387834,175 population served2012
FREDERICK WWTHW:359984,173 population served2012
CLE ELUM S_T FACILITYHW:386944,168 population served2012
MARSHALL STPHW:275644,165 population served2012
Lexington WWTP and Sewer SystemHW:352174,165 population served2012
NORTHWESTERN CHESTER CO MUN AUTHHW:362554,160 population served2012
VIVIAN STPHW:302014,156 population served2012
CARMICHAELS CUMBERLAND STPHW:367724,156 population served2012
Springville V WWTPHW:340954,152 population served2012
CLAIBORNE CO UD STPHW:375604,150 population served2012
SPRINGFIELD TWP SEW AUTHHW:365884,145 population served2012
CLAY CENTER WWTPHW:294504,140 population served2012
YOUNGWOOD BORO STPHW:367954,138 population served2012
WHITE LAKE WWTPHW:341464,137 population served2012
BROOKVILLE WWTPHW:281724,135 population served2012
S CAPE ELIZABETH WWTFHW:303874,135 population served2012
DILLON WWTPHW:325384,134 population served2012
WEST BRANCH SEW AUTH STPHW:366434,132 population served2012
MADISONVILLE WWTPHW:374444,130 population served2012
MONTE VISTA WWTPHW:262684,129 population served2012
CARLISLE WWTPHW:285484,127 population served2012
TUNICA POTWHW:316314,126 population served2012
TELFORD BORO AUTH STPHW:362114,126 population served2012
KANE BORO KINZUA STPHW:368734,126 population served2012
BUHL SEWAGE LAGOONHW:274694,122 population served2012
CASSVILLE WWTPHW:322184,116 population served2012
Saint Henry WWTP and Sewer SystemHW:353904,116 population served2012
Williamston_Big Creek EastHW:371434,116 population served2008
SAYRE WWTHW:357284,114 population served2012
RANGELY WWTPHW:263864,112 population served2012
FERRIDAY SOUTHWEST WWTPHW:302374,111 population served2012
LONSDALE WWTPHW:312964,111 population served2012
SHELBURNE FD1 WPCFHW:382754,110 population served2012
COLONIAL BEACH STPHW:383314,110 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.