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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
Armona WWTFHW:260433,239 population served2012
NNASHVILLE CITY OFHW:272623,238 population served2012
TWIN BORO STPHW:365313,237 population served2012
CANTON WWTPHW:317743,235 population served2012
DEMOTTE WWTPHW:282823,234 population served2012
CANTON LAGOONHW:372883,233 population served2012
Gravel Ridge SID 213 WWTPHW:257173,232 population served2012
MONTESANO WWPCPHW:386113,232 population served2012
RUSHVILLE STWHW:279653,229 population served2012
NORTH WALES BORO STPHW:362823,229 population served2012
PORTAGEVILLE WWTPHW:320963,228 population served2012
BLISSFIELD STPHW:310243,223 population served2012
ANDREWS WASTE TRMT PLTHW:371033,223 population served2008
Bushnell East WWTPHW:277353,221 population served2012
Tuscarawas Co Sandyville East Sparta WWTP and SewerHW:347743,220 population served2012
BOARDMAN STPHW:360913,220 population served2012
TREMONT MA STPHW:363513,218 population served2012
Alvarado WWTPHW:378423,216 population served2012
BRODHEAD STPHW:391263,215 population served2012
CRAMERTON WWTPHW:342393,214 population served2012
SALYERSVILLE STPHW:298713,213 population served2012
BENSON STPHW:313013,213 population served2012
WRIGHT CITY SOUTH WWTPHW:317943,211 population served2012
MOUNTAIN GREENHW:381813,209 population served2012
ROCKAWAY BEACH WWTPHW:321213,205 population served2012
HEAVENER UA WWTHW:356183,201 population served2012
MURPHYS WWTFHW:261353,200 population served2012
HAMILTON STPHW:276193,200 population served2012
Bass Lake CDHW:284163,200 population served2012
WARSAWHW:300543,200 population served2012
MACON POTWHW:315363,200 population served2012
Hillsborough WWTFHW:331873,200 population served2012
TABOR CITY WWTPHW:341943,200 population served2012
Lake Co Heatherstone WWTPHW:352033,200 population served2012
OAK RIDGE Rarity Ridge WWTPHW:374793,200 population served2012
San Augustine WWTPHW:379623,200 population served2012
Jourdanton WWTPHW:380823,200 population served2012
LAKELAND SD 1 STP OneidaHW:395983,200 population served2012
NEW MORGAN BOROHW:370393,192 population served2012
HUGOTON WWTPHW:293323,190 population served2012
HOWARDS GROVE STPHW:393303,190 population served2012
Brinkley WWTPHW:256883,188 population served2012
MONTROSE STPHW:312883,188 population served2012
New Paris CDHW:279783,184 population served2012
Deerfield Dept of Public WorksHW:307573,184 population served2012
MACKS INN IS PK VILLAGE POTWHW:274023,182 population served2012
ST MARIES S_T LAGOONHW:274093,182 population served2012
SPOONER WWTPHW:394563,181 population served2012
DEWEY PWA WWTHW:355703,179 population served2012
HEADLAND JIMMY CARR WWTPHW:251763,178 population served2012
KOOTENAI PONDERAY SEWAGE_TRTMT FACHW:273993,176 population served2012
Ashville WWTP and Sewer SystemHW:349213,174 population served2012
FRONTENAC WWTPHW:295693,173 population served2012
CLAXTON LASHW:270533,171 population served2012
ABINGDON STPHW:279143,171 population served2012
LANGSTON WWTHW:358793,170 population served2012
Blaine Wastewater SystemHW:373273,170 population served2012
Tornillo WWTPHW:376133,170 population served2012
Oakland STPHW:374773,169 population served2012
SAUGATUCK WWTPHW:311263,167 population served2012
HESSTON WWTPHW:294353,166 population served2012
Mount Morris V WWTPHW:339843,166 population served2012
CHILHOWIE STP andCOLLSYSHW:383733,165 population served2012
TOCCOA CREEK WPCPHW:273023,164 population served2012
GIRARD BORO STPHW:368983,164 population served2012
MID CAMERON AUTH EMPORIUM STPHW:369633,163 population served2012
TISHOMINGO WWTHW:358503,162 population served2012
WEST BURLINGTON WWTPHW:291283,161 population served2012
Gentry WWTPHW:254843,158 population served2012
Winebrenner WWTPHW:306283,157 population served2012
FLOYD CENTRAL HS STPHW:281233,154 population served2012
VINTON SEWERAGE SYSTEMHW:302003,154 population served2012
Key Colony Beach STPHW:268193,152 population served2012
MOUNT CARMEL MA STPHW:366423,151 population served2012
BCUD _ Port St John WWTPHW:267293,150 population served2012
LAKE BUTLER STPHW:269743,150 population served2012
MASON CITY STPHW:278933,150 population served2012
Fishkill T Rombout SD and WWTPHW:335843,150 population served2012
Madison Co SD 2 Choctaw Lake WWTPHW:347953,149 population served2012
New Castle Town ofHW:265143,148 population served2012
OAKRIDGE STPHW:360573,148 population served2012
BENTON CITY S_T FACHW:386873,145 population served2012
ALBION BORO STPHW:368703,144 population served2012
Shannon Hills WWTPHW:257313,143 population served2012
LICKING WWTPHW:321903,143 population served2012
GRANGEVILLE S_T FACILITYHW:274213,141 population served2012
FARMINGTON STPHW:279503,138 population served2012
FLEMINGSBURG STPHW:299673,138 population served2012
STANLEY WWTPHW:342423,136 population served2012
MAXTON WWTPHW:343643,135 population served2012
SPRINGFIELD STPHW:300443,134 population served2012
Port Henry V STPHW:337923,132 population served2012
GARNER STLHW:286973,129 population served2012
TOMPKINSVILLEHW:300493,129 population served2012
EATONTON WEST WPCPHW:271273,127 population served2012
DONALSONVILLEHW:271893,127 population served2012
Neosho Crowder WWTPHW:320063,125 population served2012
Ontario Co Honeoye Lake SD WWTPHW:340013,125 population served2012
CALAIS WWTFHW:304763,124 population served2012
BANDON STPHW:360873,122 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.