How many wastewater treatment plants are there in Alaska?

Klarifi tracks 36 publicly owned wastewater treatment plants in Alaska with a combined average flow of 17 million gallons per day, serving about 148,722 residents. 5 of them treat more than 1 MGD and 0 more than 10 MGD.

What is the largest wastewater treatment plant in Alaska?

Golden Heart Utilities WWTP in Fairbanks is the largest plant in Alaska by average flow, treating about 4.69 MGD.

What treatment technologies are common in Alaska?

7 of Alaska's plants use lagoon systems and 2 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in Alaska are up for renewal?

3 permits held by Alaska plants expire in 2026 and 11 in 2027. Renewals typically bring new limits and trigger upgrade projects.

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Wastewater treatment plants in Alaska

Name: Wastewater treatment plants in Alaska
Creator: Klarifi
License: https://klarifi.io/terms-of-service

36 facilities · 17 MGD combined flow

Klarifi tracks 36 publicly owned wastewater treatment plants in Alaska with a combined average flow of 17 MGD, serving about 148,722 residents. 5 plants treat more than 1 MGD and 0 more than 10 MGD; 7 use lagoon systems and 2 have digesters or biogas infrastructure. The largest is Golden Heart Utilities WWTP in Fairbanks at 4.69 MGD. 3 NPDES permits expire this year and 11 next year.

Every plant below links to a profile with average and design flow, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city. Treatment technology and verified contacts are shown with a free Klarifi account.

36 plant locations in Alaska; dot size follows average flow. Boundaries: U.S. Census Bureau.

NPDES permits and renewals in Alaska

Every plant discharges under an NPDES permit that is renewed every five years, usually with tighter limits. The renewal year is the year a plant budgets for upgrades.

All NPDES permits in Alaska →11 permits expiring in 2027 →9 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in Alaska

The 10 largest publicly owned wastewater treatment plants in Alaska by average flow, with NPDES permit, expiry and three-year violation count. Source: EPA ICIS-NPDES via Klarifi.
Facility	City	Avg flow (MGD)	Design (MGD)	NPDES permit	Expires	Violations (3y)
Golden Heart Utilities WWTP	Fairbanks	4.69	—	AK0023451	Dec 2026	1
Mendenhall Valley WWTP	Juneau	2.15	—	AK0022951	May 2025	63
Kodiak Wastewater Treatment Facility	Kodiak	1.78	—	AK0021555	May 2029	2
Charcoal Point WWTP	Ketchikan	1.61	4	AK0021440	Oct 2030	10
Eagle River WWTP	Eagle River	1.39	—	AK0022543	Jan 2031	1
Juneau Douglas Wastewater Treatment Plant	Juneau	0.96	—	AK0023213	Feb 2026	25
Palmer WWTP	Palmer	0.7	—	AK0022497	Feb 2030	11
Mountain Point Wastewater Treatment Plant	Ketchikan	0.48	—	AKG572028	Dec 2027	21
Girdwood WWTP	Girdwood	0.47	—	AK0047856	Oct 2005	6
Lowell Point WWTP	Seward	0.45	—	AK0021890	Sep 2027	19

Treatment technology for each plant is shown with a free Klarifi account. Create one →

The 50 largest plants in Alaska →EPA enforcement actions in Alaska →Alaska capital improvement plans →

Alaska plants by treatment technology

Lagoon systems (10)Activated sludge and clarifiers (8)Chlorine disinfection (6)

All 36 plants in Alaska

Facility	City	Flow (MGD)
Golden Heart Utilities WWTP	Fairbanks	4.69
Mendenhall Valley WWTP	Juneau	2.15
Kodiak Wastewater Treatment Facility	Kodiak	1.78
Charcoal Point WWTP	Ketchikan	1.61
Eagle River WWTP	Eagle River	1.39
Juneau Douglas Wastewater Treatment Plant	Juneau	0.96
Palmer WWTP	Palmer	0.7
Mountain Point Wastewater Treatment Plant	Ketchikan	0.48
Girdwood WWTP	Girdwood	0.47
Lowell Point WWTP	Seward	0.45
Kenai STP	Kenai	0.44
Homer Public Works Department And WWTP	Homer	0.44
Petersburg WWTP	Petersburg	0.43
Metlakatla Sewer Treatment Plant	Metlakatla	0.23
Thorne Bay WWTF	Thorne Bay	0.22
Skagway WWTP	Skagway	0.21
Dillingham WWTP	Dillingham	0.18
North Pole WWTP	North Pole	0.17
Talkeetna Sewage Treatment Lagoons	Talkeetna	0.12
Auke Bay Wastewater Treatment Facility	Juneau	0.05
Seldovia Water System	Seldovia	0.05
Nenana WWTF	Nenana	0.04
King Salmon WWTF	King Salmon	0.04
Saint Marys WWTF	Saint Marys	0.03
Kaktovik WWTF	Kaktovik	0.03
Point Hope WWTF	Point Hope	0.02
Nuiqsut WWTF	Nuiqsut	0.02
Atqasuk WWTF	Atqasuk	0.01
Point Lay WWTF	Point Lay	0.0076
Kisimgiugtuq School Wastewater Treatment Facility	Kivalina	0.0052
Mcneil Canyon Elementary School	Homer	0.00035
Waterfall Creek WWTP	Ketchikan	0.00000022
Alakanuk Lagoon	Alakanuk	—
Buckland Sewage Lagoon	Buckland	—
Chuathbaluk Wastewater Lagoon	Aniak	—
Mountain Village Lagoon	Mountain Village	—

Wastewater treatment in Alaska: questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026.

Wastewater terms: WWTP · POTW · MGD · NPDES permit · Centrate · Ozonation · all terms

Cite this page

Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.

Klarifi. “Wastewater treatment plants in Alaska.” Updated October 26, 2026. https://klarifi.io/facilities/alaska

Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.

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