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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
BRANDON WWTFHW:382953,122 population served2012
BEULAH LAGOONHW:345323,121 population served2012
RIDGEMARK WWTFHW:259313,120 population served2012
FORKS TREAT STPHW:385533,120 population served2012
North Crossett WWTPHW:254733,119 population served2012
CLINTON POTW NORTHEASTHW:314243,118 population served2012
MURFREESBORO WWTPHW:342673,117 population served2012
BAD AXE WWTPHW:308643,116 population served2012
NEW MADRID WWTPHW:320943,116 population served2012
Dresden LagoonHW:373683,116 population served2012
ORWIGSBURG BORO STPHW:363273,115 population served2012
SALMON SEWAGE LAGOONHW:274923,112 population served2012
CEDAR SPRINGS STPHW:311843,112 population served2012
BEAVERHW:381343,112 population served2012
LIVINGSTON MAIN LAGOONHW:251913,109 population served2012
SANDSTONE WWTPHW:313433,109 population served2012
NEW BADEN STPHW:275593,105 population served2012
MULDROW UA WWTHW:356293,104 population served2012
CARLETON LAGOONHW:309803,103 population served2012
GUERNSEY LAGOONHW:396623,102 population served2012
RIO DELL WWTFHW:257963,100 population served2012
PERRY PARK WWTPHW:263273,100 population served2012
NEWTON COUNTY STPHW:271293,100 population served2012
MIDDLETOWN WWTPHW:282673,100 population served2012
River Rock County W and S DistrictHW:326293,100 population served2012
MAGGIE VALLEY SD WWTPHW:342643,100 population served2012
Delta WWTP and Sewer SystemHW:350743,100 population served2012
Stark Co Magnolia WWTPHW:352503,100 population served2012
MOUNTAIN CITY WWTPHW:374623,100 population served2012
Quanah WWTPHW:375913,100 population served2012
Nolanville WWTPHW:377323,100 population served2012
Hallsville WWTPHW:379213,100 population served2012
HEMPSTEAD STPHW:380463,100 population served2012
WARM SPRINGS PSD BERK SPRNGS TPHW:389483,100 population served2012
CUT BANK LAGOONHW:325493,096 population served2012
CHANDLER STPHW:281073,094 population served2012
CRYSTAL STPHW:308803,092 population served2012
HEYBURN STPHW:274673,089 population served2012
MUNISING STPHW:311283,083 population served2012
WEST NEWTON BORO STPHW:367523,083 population served2012
Cascade Shores WWTPHW:261593,081 population served2012
CASTLE DALEHW:381313,080 population served2012
HENDERSON STP2 and CSHW:298513,077 population served2012
Tahoka WWTPHW:377213,076 population served2012
NYSSA STPHW:361613,075 population served2012
CASHMERE STP FACILITYHW:386913,075 population served2012
Seymour WWTPHW:378653,074 population served2012
MOUNT OLIVE NORTH STPHW:279273,073 population served2012
ROGERSVILLE WWTPHW:324063,073 population served2012
BERWICK WPCFHW:304083,071 population served2012
HINCKLEY STPHW:279333,070 population served2012
PERHAM WWTPHW:313123,070 population served2012
Walton V WWTPHW:337193,070 population served2012
Sonora WWTPHW:381073,070 population served2012
DAYTON STPHW:385673,068 population served2012
FULTON STPHW:299713,067 population served2012
ODESSA SE WWTFHW:317683,067 population served2012
LODI WWTPHW:392983,067 population served2012
DELHI SEWERAGE SYSTEMHW:301253,066 population served2012
ELLSWORTH WWTPHW:392043,066 population served2012
Coxsackie V Sewers and WWTPHW:337453,065 population served2012
NEVADA CITY WWTFHW:260833,064 population served2012
CARROLTON STPHW:278253,064 population served2012
Hinsdale WWTFHW:331593,062 population served2012
Lodi WWTP and Sewer SystemHW:352213,061 population served2012
LINDSBORG WWTPHW:296463,060 population served2012
LAS ANIMAS WWTPHW:264003,059 population served2012
OWENSVILLE WWTPHW:324353,059 population served2012
SODA SPRINGS WW TREAT FACHW:273773,058 population served2012
Muddy Run RA Madera STPHW:370523,056 population served2012
SALTILLO POTWHW:315993,054 population served2012
NANTY GLO STPHW:366353,054 population served2012
BATTLEMENT MESA STPHW:263763,053 population served2012
BENSON WWTPHW:342813,052 population served2012
Doylestown WWTP and Sewer SystemHW:350773,051 population served2012
Stark Co Bob O Link Allotment WWTPHW:355013,051 population served2012
KURE BEACH WWTPHW:343283,050 population served2012
THOMPSON CREED WWTPHW:371073,050 population served2008
Cotter Gassville WWTPHW:256183,048 population served2012
SUTTONS BAY STPHW:310873,047 population served2012
Granville V STPHW:338193,041 population served2012
Plain City WWTP and Sewer SystemHW:353513,040 population served2012
BLANCHARD WWTHW:358833,040 population served2012
NEWPORT STPHW:386173,040 population served2012
SYRACUSE WWTPHW:283003,038 population served2012
OKEMAH PWA WWTHW:359333,038 population served2012
WHITE HAVEN STPHW:364343,036 population served2012
BROOKFIELD NE WWTPHW:323533,035 population served2012
ELLPORT BORO STPHW:369073,035 population served2012
Twin Lakes RSD Big Monon BayHW:284393,034 population served2012
OSAGE CITY WWTPHW:294953,034 population served2012
ITHACA WWSLHW:311083,031 population served2012
LAKE CITY BORO STPHW:368693,031 population served2012
MAIZE WWTPHW:292663,030 population served2012
Fleming NeonHW:300843,024 population served2012
UNION CITY BORO STPHW:368573,022 population served2012
LUMMI TRIBE STPHW:387213,022 population served2012
UNION WILLIAMS PSDHW:390393,021 population served2012
Tansi Sewer Utility DistrictHW:374673,020 population served2012
Clyde WWTPHW:377093,020 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.