Free Alaska water report: PFAS & lead levels for every water system, worst-affected cities, and EPA violations. Check your ZIP.
Alaska's water supply is shaped by geography unlike any other state. With approximately 733,000 residents spread across 663,000 square miles – an area more than twice the size of Texas – the state faces water infrastructure challenges that are unique in the nation. Anchorage and Fairbanks operate modern municipal water systems drawing from surface reservoirs and groundwater wells, but hundreds of remote communities across the Bush, the North Slope, and the Aleutian Islands rely on small community systems, hauled water, or individual wells that may receive little to no regular testing.
The Alaska Department of Environmental Conservation (ADEC) oversees drinking water quality for roughly 1,500 public water systems. Many of these serve fewer than 100 people. Permafrost, extreme cold, and lack of road access make infrastructure maintenance far more expensive and logistically difficult than in the Lower 48. In some rural Alaska Native villages, residents still rely on untreated surface water or self-haul from community watering points – a reality that puts them at higher risk from any contamination source.
Alaska's reputation for pristine water is accurate for much of the state – and misleading for the communities near military installations. The EPA's UCMR5 monitoring has confirmed PFAS detections at public water systems in Alaska, with the most significant contamination concentrated around military sites where AFFF firefighting foam was used for decades.
The state's primary drinking water sources are surface water (rivers, lakes, and snowmelt) and shallow groundwater. In undeveloped areas, these sources are generally clean. But where AFFF was used – on flight lines, in fire training areas, at crash sites – PFAS has migrated into the groundwater and, in some cases, into nearby surface water. According to ADEC's PFAS contamination reports, multiple sites across the state have confirmed groundwater PFAS levels exceeding federal health advisory thresholds.
Alaska does not have state-specific PFAS MCLs. The state follows federal EPA standards, which means the 2024 federal MCLs of 4 ppt for PFOA and PFOS now apply to public water systems. However, the many private wells and small untested systems in the state fall outside this regulatory framework.
Eielson Air Force Base, located about 26 miles southeast of Fairbanks, is the most documented PFAS contamination site in Alaska. The Air Force has confirmed PFAS in groundwater on and around the base, with concentrations in some monitoring wells reaching thousands of parts per trillion – far above any safe threshold. The contamination stems from decades of AFFF use in firefighting training. The Department of Defense has provided bottled water and is working on remediation, but the cleanup is expected to take years.
Joint Base Elmendorf-Richardson (JBER) in Anchorage has also been flagged for PFAS investigation. As the state's largest military installation, JBER sits adjacent to Anchorage's primary population center. PFAS detections in monitoring wells on and near the base have raised concerns about potential migration toward municipal supply sources.
Other military sites under investigation include Fort Wainwright near Fairbanks, Clear Space Force Station, and several former Distant Early Warning (DEW) Line sites across the Arctic. The DEW Line stations, built during the Cold War and many now abandoned, used firefighting foams and other PFAS-containing materials in remote locations where contamination may persist untreated. Our military bases page has the full list of confirmed sites.
ADEC has taken a site-specific approach to PFAS, focusing monitoring and response on known contamination areas rather than implementing broad statewide testing mandates. The state has worked with the Department of Defense on investigations at military sites and has conducted targeted sampling around other potential PFAS sources.
Alaska's participation in UCMR5 has provided the first systematic look at PFAS across the state's larger public water systems. Results have confirmed what was suspected: systems near military installations show detections, while systems in areas without PFAS point sources generally do not.
The challenge in Alaska is coverage. According to EPA data, hundreds of small community water systems in the state were not required to participate in UCMR5 due to their small size. Many rural and Alaska Native communities have never been tested for PFAS. For residents of these communities, the absence of data is not the same as the absence of contamination – particularly near former military radar stations or fuel storage sites.
For background on PFAS compounds and how they move through water systems, see our PFAS guide.
Alaska's water quality varies enormously depending on where you live. Anchorage residents on the municipal system face a different situation than residents of a North Slope village on hauled water.
1. Check your area using our free tool at the homepage. We map available monitoring data to your location so you can see what has been tested and what has been found. 2. If you are on a private well – common throughout the Fairbanks area, the Matanuska-Susitna Valley, and rural Alaska – PFAS testing is not required by law. If you live within 10 miles of a military installation or former DEW Line site, we recommend a certified PFAS lab test. 3. For communities with confirmed PFAS contamination, reverse osmosis is the most effective household treatment. Our water filter guide covers which systems work for PFAS and which certifications matter. 4. A detailed water report for your address can pull together available federal and state data in one place.
Alaska's water is among the cleanest in the nation in most locations. But proximity to military operations has created localized contamination that demands attention. Check your specific location to see what the data shows for your community.