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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
NEW HOPE HCR LAGOONHW:250712,833 population served2012
PIXLEY WWTFHW:261372,833 population served2012
HEALDTON WWTHW:357502,830 population served2012
SHINNSTON WWTPHW:388662,829 population served2012
JUNE LAKE WWTFHW:261702,828 population served2012
England WWTPHW:256732,825 population served2012
ERIN STPHW:373772,824 population served2012
VASSAR STPHW:309452,823 population served2012
PEOTONE STPHW:275672,822 population served2012
Hebron WWTP and Sewer SystemHW:351732,820 population served2012
EAGLE BUTTE STPHW:372992,820 population served2012
Bethlehem WWTFHW:331732,819 population served2012
SIBLEY WWTPHW:290392,815 population served2012
WIND GAP BORO STPHW:363852,812 population served2012
SHOEMAKERSVILLE SEW FACHW:363162,811 population served2012
QUITMAN POTWHW:315852,808 population served2012
RICHWOOD WWTPHW:389552,808 population served2012
Suffolk CoStrathmoreHuntingtonSTPHW:335382,807 population served2012
Allen Co American 2 WWTPHW:347982,806 population served2012
Windham WWTP and Sewer SystemHW:355152,806 population served2012
TULAROSA WWTPHW:334552,804 population served2012
MARION WWTPHW:295822,802 population served2012
BODEGA BAY WWTFHW:258062,800 population served2012
PALISADE WWTPHW:263732,800 population served2012
Innlet Beach WWTPHW:268732,800 population served2012
PARK VIEW LAGOONHW:291552,800 population served2012
Warwick T SD1 Wickham Lake STPHW:336032,800 population served2012
YADKINVILLE WWTPHW:344422,800 population served2012
Lakengren WWTP and Sewer SystemHW:353722,800 population served2012
LAKEVIEW JSA STPHW:369102,800 population served2012
Ranger WWTPHW:377922,800 population served2012
LORDSBURG STPHW:334402,797 population served2012
NORTHERN LANC CO BRECKNOCK STPHW:363942,795 population served2012
STERLINGTON STPHW:302872,794 population served2012
Minster WWTP and Sewer SystemHW:352832,794 population served2012
LUCEDALE POTWHW:315292,792 population served2012
LITTLE RIVER WPCPHW:270182,791 population served2012
SELBYVILLE STPHW:266292,790 population served2012
ALBIA WWTP NOHW:284672,790 population served2012
Copper Cove STPHW:260312,783 population served2012
SSSD_Clifton WWTPHW:372522,783 population served2008
WENDELL SEWAGE TRT FACHW:275272,782 population served2012
BYRNES MILL SOUTH WWTPHW:320472,781 population served2012
DALLAS NORTH WPCPHW:271792,780 population served2012
Sabina WWTP and Sewer SystemHW:353872,780 population served2012
OKOLONA POTW SOUTHHW:315632,777 population served2012
Stony Brook RSA Pennington STPHW:332912,776 population served2012
MORTON POTWHW:315492,775 population served2012
EATONVILLE STPHW:385712,775 population served2012
VERONA POTWHW:316402,773 population served2012
FAIRVIEW WWTHW:358982,773 population served2012
ELKTONHW:299622,772 population served2012
BELTZVILLE STATE PARKHW:369702,772 population served2012
FORT BRANCH WWTPHW:280952,771 population served2012
Marianna East WWTPHW:256562,770 population served2012
CORNELIA WPCPHW:271752,770 population served2012
Point Lookout State Park WWTPHW:306542,770 population served2012
FORSYTH WWTPHW:321202,770 population served2012
REDFIELD WWTFHW:372932,770 population served2012
Reno WWTPHW:379402,770 population served2012
DECATUR POTW NUMBER 1HW:314462,768 population served2012
ROARING SPRING MUN AUTHHW:366252,768 population served2012
Green Forest WWTPHW:254992,761 population served2012
NORTON WWTPHW:297522,760 population served2012
EAST TAWAS WWTPHW:308542,760 population served2012
SHADY COVE STPHW:361842,760 population served2012
Glen Rose WWTPHW:377582,760 population served2012
DODGE CENTER WWTPHW:313642,759 population served2012
MIDDLEBURG BORO STPHW:366032,758 population served2012
Manchester Shortsville V Jt STPHW:340002,755 population served2012
Syracuse Racine WSD WWTP and SewersHW:354462,750 population served2012
CHARLES TOWN TUSCAWILLA WWTPHW:388762,750 population served2012
Mountain View WWTPHW:255872,748 population served2012
Columbiana Co Beaver Local WWTPHW:348162,745 population served2012
ELK RAPIDS STPHW:310912,744 population served2012
WORTHINGTON WWTPHW:389072,742 population served2012
SHERWOOD STPHW:394442,741 population served2012
MILLSBORO STPHW:266272,740 population served2012
WEST TERRE HAUTE WWTPHW:280572,739 population served2012
CACHE WWTHW:357032,738 population served2012
ELDORA WWTPHW:286542,737 population served2012
HOISINGTON WWTPHW:292602,734 population served2012
STIGLER MA WWTHW:358292,731 population served2012
CAVE JUNCTION STPHW:361022,731 population served2012
HILLSBORO WWTPHW:295752,730 population served2012
Farmington WWTFHW:332152,730 population served2012
PEARISBURG STPHW:383272,729 population served2012
WINFIELD WWTPHW:251162,728 population served2012
HORTONVILLE STPHW:392612,728 population served2012
HILDALEHW:382032,726 population served2012
BUTLER WWTPHW:280442,725 population served2012
TILTON STPHW:278762,724 population served2012
STERLING WWTPHW:292922,721 population served2012
MIDDLEVILLE LAGOONHW:310552,721 population served2012
COKATO WASTEWATER PLANTHW:312852,721 population served2012
FRUITLANDCITY OF SNAKE RIVERHW:273862,720 population served2012
JONESVILLE STPHW:301512,720 population served2012
SNOW HILL WWTPHW:306492,720 population served2012
Franklin Co Darbydale Area WWTP and SewersHW:350682,720 population served2012
Monterey WWTPHW:374582,717 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.