Is Anchorage, AK Tap Water Safe to Drink?
Anchorage, AK tap water has a qualified safety concern. A PFAS compound called 11Cl-PF3OUdS was detected at or above EPA's health reference level in water serving 11 of 20 ZIP codes. While the water meets many federal standards, this PFAS finding is worth taking seriously, especially for households with infants or pregnant individuals.
Where Does Anchorage Get Its Water?
Anchorage draws its drinking water from a combination of surface water and groundwater sources. The primary utility serving most residents is the Municipality of Anchorage water system. Additional water systems on Joint Base Elmendorf-Richardson serve military personnel and some nearby residents.
Major treatment facilities include the Eklutna Water Treatment Facility, which processes surface water from the Eklutna Lake area, and the Ship Creek Treatment Plant, which handles water from Ship Creek. Well treatment plants throughout the area serve portions of the city that rely on groundwater.
Smaller systems also operate within Anchorage. Doyon Utilities serves the Richardson area of Joint Base Elmendorf-Richardson, the Elmendorf side of the base has its own system, and Valli Vue serves a residential subdivision. Each system operates under EPA and state oversight.
How Is Anchorage Tap Water Treated?
Anchorage's main water systems use a multi-step treatment process. Surface water goes through coagulation and filtration to remove particles, sediment, and microorganisms before it reaches your tap. Groundwater wells receive treatment suited to their source quality, including well-specific treatment steps.
Disinfection is applied using free chlorine or chloramines, depending on the system and point in the distribution network. Disinfection kills bacteria and viruses and is required by federal rules. A small portion of the supply receives no disinfection, which is permitted for certain groundwater sources that meet specific federal criteria.
The base water systems at Joint Base Elmendorf-Richardson operate their own treatment works, including a dedicated water treatment plant, providing treated water to military and associated residential populations on the installation.
What's in Anchorage Tap Water?
The most significant finding is a PFAS compound called 11Cl-PF3OUdS. Recent EPA samples detected it at up to 0.005 micrograms per liter, which equals EPA's health reference level for this substance. It was detected in water serving 13 of 20 ZIP codes, and 11 of those ZIPs had levels at or above that benchmark.
Two other PFAS compounds were also detected. PFTrDA was found at up to 0.007 micrograms per liter, and 8:2 FTS was detected at up to 0.005 micrograms per liter. Neither of these exceeded a guideline in the data, but both are part of a broader PFAS picture in Anchorage's water supply. Lithium was also detected, with a maximum measured value of 9 micrograms per liter, and no guideline exceedance was recorded for it.
PFAS compounds are a class of synthetic chemicals that were widely used in industrial processes, firefighting foam, and consumer products. Their presence in drinking water near military installations is a recognized pattern nationally, and Joint Base Elmendorf-Richardson is a large military facility within Anchorage.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| 11Cl-PF3OUdS | 0.005 µg/L | 0.005 µg/L | 13 ZIPs | Above guideline |
| lithium | 9 µg/L | — | 0 ZIPs | Within guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| 11Cl-PF3OUdS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 8:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for Anchorage
The primary concern is 11Cl-PF3OUdS, detected at up to 0.005 micrograms per liter, which matches EPA's health reference level for this compound. It is important to note that this is a non-enforceable health benchmark, not a federal legal limit. No enforceable federal maximum contaminant level for this specific PFAS compound appears in the available data. Exceeding a health reference level means EPA considers the level worth attention, not that a legal violation has occurred.
Sensitive groups face a higher potential concern. Infants, pregnant individuals, and people with weakened immune systems are generally more vulnerable to PFAS exposure because these compounds can accumulate in the body over time and have been linked in research to effects on hormonal and immune function. If your household includes any of these individuals, filtering your water is a reasonable precaution.
A filter certified to NSF/ANSI 58 (reverse osmosis) or NSF/ANSI P473 is the most effective choice for reducing PFAS in tap water. NSF/ANSI is an independent, third-party certification program, so look for that label on the box or the manufacturer's product page to confirm the filter has been tested. Because Anchorage water also uses chlorine or chloramine disinfection, a filter certified to NSF/ANSI 42 can help with taste and residual disinfectant as well.
Lithium in Anchorage water was detected but did not exceed any guideline in the data. There is currently no enforceable federal drinking-water standard for lithium, and the science on low-level lithium exposure from drinking water is still developing. The levels detected here do not trigger any known regulatory action.
Best Broad-Spectrum Filters for This Water Profile
This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.
8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.
See recommendations matched to your exact address: choose your ZIP code below.
Frequently Asked Questions about Anchorage Tap Water
Is Anchorage tap water safe to drink?
Anchorage tap water meets many federal standards, but a PFAS compound called 11Cl-PF3OUdS was detected at or above EPA's health reference level in water serving 11 of 20 ZIP codes. This benchmark is not an enforceable legal limit, but EPA considers it a meaningful threshold. Most adults face low immediate risk, though households with infants or pregnant individuals may want to use a certified PFAS-reducing filter.
What contaminants are in Anchorage tap water?
Recent EPA testing found three PFAS compounds: 11Cl-PF3OUdS at up to 0.005 micrograms per liter (at EPA's health reference level), PFTrDA at up to 0.007 micrograms per liter, and 8:2 FTS at up to 0.005 micrograms per liter. Lithium was also detected at up to 9 micrograms per liter, below any current guideline. No enforceable federal maximum was exceeded by any of these substances based on available data.
Where does Anchorage get its drinking water?
Anchorage gets its water from both surface water and groundwater. The Municipality of Anchorage is the primary utility, treating water at facilities including the Eklutna Water Treatment Facility and the Ship Creek Treatment Plant. Military installations on Joint Base Elmendorf-Richardson operate their own systems through Doyon Utilities and a separate Elmendorf system. A small subdivision water system and other smaller systems also operate within the city.
Do I need a water filter in Anchorage?
A filter is not legally required, but it is a reasonable step given the PFAS detections in Anchorage water. Look for a filter certified to NSF/ANSI 58 (reverse osmosis) or NSF/ANSI P473, both of which are independently tested to reduce PFAS compounds. NSF/ANSI certification means the product has been verified by a third-party testing organization. Households with infants or pregnant individuals have the most reason to consider filtering.
How often is Anchorage tap water tested?
Anchorage water systems are tested on schedules required by federal and state rules, covering dozens of contaminants on a rolling basis. The PFAS and other contaminant data shown here come from recent EPA sampling, with the most recent results dated May 2025. Utilities are also required to publish an annual Consumer Confidence Report summarizing the previous year's test results, which you can request from your water provider.
What is the best water filter for Anchorage?
Given that PFAS compounds are the top concern in Anchorage, the best choice is a filter certified to NSF/ANSI 58 (reverse osmosis) or NSF/ANSI P473. Both certifications confirm that the filter has been independently tested to reduce PFAS. If you also want to reduce residual chlorine taste or odor from disinfection, add a filter certified to NSF/ANSI 42. Always check that the specific product carries the certification, not just the brand.
Tap water reports by ZIP in Anchorage
- 99501 - Downtown, Anchorage tap water report Higher concern
- 99502 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99503 - Downtown, Anchorage tap water report Higher concern
- 99504 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99505 - Jber, Anchorage tap water report Some concern
- 99506 - Jber, Anchorage tap water report Some concern
- 99507 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99508 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99510 - Anchorage tap water report No recent data
- 99511 - Anchorage tap water report Some concern
- 99514 - Anchorage tap water report No recent data
- 99515 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99516 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99517 - Anchorage census subarea, Anchorage tap water report Higher concern
- 99518 - Anchorage census subarea, Anchorage tap water report No recent data
- 99530 - Anchorage census subarea, Anchorage tap water report No recent data
- 99567 - Chugiak, Anchorage tap water report Higher concern
- 99577 - Eagle River, Anchorage tap water report Higher concern
- 99587 - Alyeska, Anchorage tap water report Some concern
- 99599 - Anchorage tap water report No recent data
Water utilities serving Anchorage, AK
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- DOYON UTILITIES JBER - RICHARDSONLooks OK
- JBER-ELMENDORFLooks OK
- ANCHORAGE SANDS APARTMENTSNo recent federal sampling
- UNIFIED ALASKAN UTILITIES-HOMESTEAD DIV.No recent federal sampling
Also covers / overlaps with
- Anchorage census subarea, AK · Township
- Jber, AK · Community
- Aniak census subarea, AK · Township
- Chugiak, AK · Community
- Eagle River, AK · Community
- Girdwood, AK · Community