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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
MASONTOWN MUN AUTH BIG RUNHW:368122,954 population served2012
Lincoln WWTFHW:331792,953 population served2012
KEWAUNEE WWTPHW:392812,952 population served2012
WILLIAMSTOWN WWTPHW:390442,950 population served2012
Avon V WWTPHW:339792,947 population served2012
BERRYVILLE STPHW:384032,947 population served2012
OSSIAN WWTPHW:280492,943 population served2012
COLUMBUS JUNCTION STLHW:285872,935 population served2012
HARRISBURG LAGOON TREATMENT PLANTHW:361312,935 population served2012
LA CENTER STPHW:385932,935 population served2012
Limestone Correctional FacilityHW:252512,933 population served2012
OURAY WWTPHW:263852,932 population served2012
DURANT POTWHW:314622,932 population served2012
ELIZABETHVILLE STPHW:365832,925 population served2012
MANGUM WWTHW:358192,924 population served2012
WHITE HALL STWHW:278262,922 population served2012
Madison WWTP and Sewer SystemHW:352452,921 population served2012
OCONTO FALLS STPHW:393652,921 population served2012
WESTERN CLINTON C0 RENOVO STPHW:366202,920 population served2012
EAGLE LAKE UD 1 STPHW:394882,920 population served2012
ABBOTTSTOWN PARADISE STPHW:365212,919 population served2012
TUSKEGEE SOUTH WWTPHW:251112,917 population served2012
Tipton_ Getrag Division E WWTPHW:284492,917 population served2012
SHADE CENTRAL CITY STPHW:365042,917 population served2012
ROGERS CITY STPHW:310732,915 population served2012
ST JOSEPH STPHW:275852,912 population served2012
WELCH WWTPHW:389542,910 population served2012
New Bremen WWTP and Sewer SystemHW:352942,909 population served2012
VIENNA WPCP CITY OFHW:270942,905 population served2012
ELLSWORTH WWTPHW:296332,905 population served2012
FRANKFORD DAGSBORO SSDHW:266222,903 population served2012
New Concord WWTP and Sewer SystemHW:352972,901 population served2012
Mid Clay WWTPHW:267532,900 population served2012
HAMPSHIRE WWTPHW:277532,900 population served2012
St Leon WWTPHW:283962,900 population served2012
STANTONHW:300462,900 population served2012
LEXINGTON POTWHW:315242,900 population served2012
LINDSAY WWTHW:358022,900 population served2012
LAKEVIEW STPHW:361392,900 population served2012
Berry s Chapel Utility DistrictHW:373252,900 population served2012
PARHAM LANDING STPHW:384432,900 population served2012
BLANCHARD SEWERAGE SYSTEMHW:301122,899 population served2012
Bald Knob WWTPHW:255852,897 population served2012
OAKBORO WWTPHW:343932,897 population served2012
Silver Creek V WWTPHW:340772,896 population served2012
NEW WILMINGTON BORO STPHW:369402,896 population served2012
AFTON STPHW:312272,895 population served2012
Malakoff WWTPHW:379312,895 population served2012
COVINGTON WWTPHW:282452,893 population served2012
EUREKA WWTPHW:297702,893 population served2012
ST MARYS WWTPHW:389602,892 population served2012
Charlestown WWTFHW:332202,891 population served2012
AMERY STPHW:390722,891 population served2012
VALENTINE WWTPHW:326502,890 population served2012
EAST HANOVER TWP GRANTVILLE STPHW:365812,890 population served2012
Hoxie WWTPHW:255842,889 population served2012
OOSTBURG STPHW:393692,889 population served2012
LENA WASTEWATER TREAT WKSHW:276262,887 population served2012
Orocovis WWTPHW:397722,887 population served2012
WOODSTOCK STPHW:383452,885 population served2012
MCCOLL OXIDATION POND_WWTFHW:371392,884 population served2008
LOUISBURG 2 SOUTH WWTPHW:294892,880 population served2012
BUCKNER WWTPHW:319042,876 population served2012
RUGBY LAGOONHW:346692,876 population served2012
WILLISTON STPHW:267992,875 population served2012
CLAIBORNE NEW TAZEWELL STPHW:375502,875 population served2012
DEPT OF WELFARE POLK BORO STPHW:369132,872 population served2012
LECLAIRE WWTPHW:288032,868 population served2012
Henniker WWTFHW:331962,868 population served2012
NEW CORDELL WWTHW:355682,867 population served2012
QUINCY DOMESTIC STPHW:386442,864 population served2012
Winter Park Estates WWTPHW:266732,862 population served2012
GRANITE FALLS STPHW:313182,862 population served2012
Warm Springs WWTPHW:361452,860 population served2012
RULEVILLE POTWHW:315982,859 population served2012
ALCORN STATE UNIVERSITYHW:316702,859 population served2012
HALEYVILLE SOUTH WWTPHW:251722,857 population served2012
Hamburg WWTPHW:254752,857 population served2012
CHATFIELD TREATMENT SYSHW:312322,856 population served2012
MANY STPHW:303002,853 population served2012
MOOSE LAKE STPHW:313482,853 population served2012
Superior WWTFHW:253702,850 population served2012
CLARION WWTPHW:285722,850 population served2012
CALEDONIA STPHW:313352,849 population served2012
DEXTER EAST WWTPHW:321282,849 population served2012
FREDRICKSTOWN STPHW:368322,849 population served2012
Santa Rosa City ofHW:334382,848 population served2012
COLFAX STPHW:385582,845 population served2012
ROLAND WWTHW:356302,842 population served2012
DRUMRIGHT UT WWTHW:356922,842 population served2012
CHANDLER MA WWTHW:358702,842 population served2012
GREENWOOD STPHW:392402,841 population served2012
GRAYSON STPHW:299752,839 population served2012
Pottsville WWTPHW:257112,838 population served2012
MISSOURI VALLEY STPHW:288822,838 population served2012
MACBRIDE SANITARY SEWER DISTRICTHW:288412,837 population served2012
LA GRANGE WWTPHW:342922,835 population served2012
HANOVER WWTPHW:282882,834 population served2012
BELLE PLAINE WWTPHW:285122,834 population served2012
FOX LAKE WWCC STPHW:396272,834 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.