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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · Alaska

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142 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

142 results

CompareNameNative sizeYear
Point Woronzof, John Asplund WWTPAnchorage58 MGD (million gallons per day)2022
Fairbanks WWTPFairbanks8 MGD (million gallons per day)2022
Mendenhall Treatment PlantJuneau4.9 MGD (million gallons per day)2022
Kodiak WWTPKodiak3.7 MGD (million gallons per day)2022
Juneau-Douglas WWTFJuneau2.76 MGD (million gallons per day)2022
Charcoal Point WWTPKetchikan2.68 MGD (million gallons per day)2022
Eagle River WWTPEagle River2.5 MGD (million gallons per day)2022
Haines WWTPHaines1.9 MGD (million gallons per day)2022
Valdez Aerated LagoonValdez1.85 MGD (million gallons per day)2022
Sitka WWTPSitka1.8 MGD (million gallons per day)2022
Kenai WastewaterKenai1.3 MGD (million gallons per day)2022
Soldotna WWTSoldotna1.2 MGD (million gallons per day)2022
Petersburg WWTPPetersburg1 MGD (million gallons per day)2022
Craig WWTPCraig0.997 MGD (million gallons per day)2022
Palmer Aerated LagoonPalmer0.95 MGD (million gallons per day)2022
Seward Aerated LagoonSeward0.9 MGD (million gallons per day)2022
Homer WWTPHomer0.88 MGD (million gallons per day)2022
Barrow WWTPBarrow0.75 MGD (million gallons per day)2022
Nome Aerated LagoonNome0.73 MGD (million gallons per day)2022
Klawock WWTPKlawock0.623 MGD (million gallons per day)2022
Girdwood WWTPGirdwood0.6 MGD (million gallons per day)2022
Unalaska WWTPUnalaska0.6 MGD (million gallons per day)2022
North Pole Aerated LagoonNorth Pole0.6 MGD (million gallons per day)2022
Mountain Point WWTPKetchikan0.5 MGD (million gallons per day)2022
Wasilla Aerated LagoonWasilla0.5 MGD (million gallons per day)2022
Bethel LagoonBethel0.455 MGD (million gallons per day)2022
Thorne Bay WWTPThorne Bay0.4 MGD (million gallons per day)2022
Kotzebue LagoonKotzebue0.31 MGD (million gallons per day)2022
Dillingham Aerated LagoonDillingham0.273 MGD (million gallons per day)2022
Cordova WWTPCordova0.25 MGD (million gallons per day)2022
Wrangell Aerated LagoonWrangell0.231 MGD (million gallons per day)2022
Yakutat Aerated LagoonYakutat0.2 MGD (million gallons per day)2022
Hooper Bay LagoonHooper Bay0.2 MGD (million gallons per day)2022
Talkeetna LagoonTalkeetna0.18 MGD (million gallons per day)2022
Service Area 10 WWTPPrudhoe Bay0.18 MGD (million gallons per day)2022
Auke Bay Treatment PlantAuke Bay0.16 MGD (million gallons per day)2022
Skagway WWTPSkagway0.14 MGD (million gallons per day)2022
Metlakatla Aerated LagoonMetlakatla0.13 MGD (million gallons per day)2022
Hoonah WWTPHoonah0.125 MGD (million gallons per day)2022
Noorvik LagoonNoorvik0.1 MGD (million gallons per day)2022
Akiak LagoonAkiak0.1 MGD (million gallons per day)2022
Atqasuk WWTPAtqasuk0.1 MGD (million gallons per day)2022
Chevak LagoonChevak0.1 MGD (million gallons per day)2022
Kasigluk LagoonKasigluk0.1 MGD (million gallons per day)2022
Selawik LagoonSelawik0.1 MGD (million gallons per day)2022
Naknek LagoonNaknek0.1 MGD (million gallons per day)2022
Gambell LagoonGambell0.1 MGD (million gallons per day)2022
Kipnuk LagoonKipnuk0.1 MGD (million gallons per day)2022
Togiak LagoonTogiak0.1 MGD (million gallons per day)2022
Unalakleet LagoonUnalakleet0.1 MGD (million gallons per day)2022
Kiana LagoonKiana0.085 MGD (million gallons per day)2022
Toksook Bay LagoonToksook Bay0.08 MGD (million gallons per day)2022
Point Hope WWTPPoint Hope0.076 MGD (million gallons per day)2022
Mountain Village LagoonMountain Village0.075 MGD (million gallons per day)2022
Emmonak LagoonEmmonak0.07 MGD (million gallons per day)2022
King Salmon Aerated LagoonNaknek0.07 MGD (million gallons per day)2022
Pilot Station LagoonPilot Station0.06 MGD (million gallons per day)2022
Kotlik LagoonKotlik0.06 MGD (million gallons per day)2022
Aniak LagoonAniak0.06 MGD (million gallons per day)2022
New Stuyahok LagoonNew Stuyahok0.06 MGD (million gallons per day)2022
Sand Point LagoonSand Point0.06 MGD (million gallons per day)2022
Savoogna LagoonSavoonga0.06 MGD (million gallons per day)2022
Fort Yukon LagoonFort Yukon0.059 MGD (million gallons per day)2022
Akiachak LagoonAkiachak0.059 MGD (million gallons per day)2022
Seldovia Collection and Community SepticSeldovia0.05 MGD (million gallons per day)2022
Anderson LagoonAnderson0.05 MGD (million gallons per day)2022
Nenana WWTPNenana0.05 MGD (million gallons per day)2022
Saint Paul LagoonSaint Paul Island0.05 MGD (million gallons per day)2022
Ambler LagoonAmbler0.05 MGD (million gallons per day)2022
Scammon Bay LagoonScammon Bay0.05 MGD (million gallons per day)2022
Glennallen LagoonGlennallen0.05 MGD (million gallons per day)2022
Alakanuk LagoonAlakanuk0.05 MGD (million gallons per day)2022
Saint Mary's LagoonSaint Marys0.05 MGD (million gallons per day)2022
Tuluksak LagoonTuluksak0.043 MGD (million gallons per day)2022
Marshall LagoonMarshall0.04 MGD (million gallons per day)2022
Nulato LagoonNulato0.04 MGD (million gallons per day)2022
Kaltag LagoonKaltag0.04 MGD (million gallons per day)2022
Quinhagak LagoonQuinhagak0.04 MGD (million gallons per day)2022
Anaktuvak Pass WWTPAnaktuvuk Pass0.03 MGD (million gallons per day)2022
Wainwright WWTPWainwright0.03 MGD (million gallons per day)2022
Kaktovik WWTPKaktovik0.03 MGD (million gallons per day)2022
Aleknagik LagoonAleknagik0.03 MGD (million gallons per day)2022
Kwethluk LagoonKwethluk0.03 MGD (million gallons per day)2022
Noatak LagoonNoatak0.03 MGD (million gallons per day)2022
Nondalton LagoonNondalton0.03 MGD (million gallons per day)2022
Russian Mission LagoonRussian Mission0.03 MGD (million gallons per day)2022
Nuiqsuit WWTPNuiqsut0.028 MGD (million gallons per day)2022
Lower Kalskag LagoonLower Kalskag0.027 MGD (million gallons per day)2022
Koliganek LagoonDillingham0.024 MGD (million gallons per day)2022
Shungnak LagoonShungnak0.02 MGD (million gallons per day)2022
Grayling LagoonGrayling0.02 MGD (million gallons per day)2022
Minto LagoonMinto0.02 MGD (million gallons per day)2022
Deering LagoonDeering0.018 MGD (million gallons per day)2022
Egegik LagoonEgegik0.018 MGD (million gallons per day)2022
Anvik LagoonAnvik0.016 MGD (million gallons per day)2022
Whittier WWTPWhittier0.015 MGD (million gallons per day)2022
Twin Hills LagoonTogiak0.012 MGD (million gallons per day)2022
Shishmaref LagoonSShishmaref0.012 MGD (million gallons per day)2022
Galena LagoonGalena0.01 MGD (million gallons per day)2022
McGrath LagoonMc Grath0.01 MGD (million gallons per day)2022

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.