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Bremerton WA Water Quality: Naval Shipyard PFAS and Industrial Waterfront Legacy

March 25, 2026
Puget Sound Naval Shipyard in Bremerton Washington waterfront

Bremerton, Washington sits in the shadow of one of the Navy’s oldest and busiest shipyards — and decades of military-industrial activity have left a mark on the city’s water quality. With Puget Sound Naval Shipyard (PSNS) dominating the waterfront and a history of industrial contamination, residents have legitimate reasons to pay attention to what’s in their tap water.

Bremerton’s Water System at a Glance

The City of Bremerton water utility serves roughly 50,000 people across Bremerton and parts of unincorporated Kitsap County. The city’s drinking water comes primarily from surface sources — the Casad Dam reservoir system on the Union River watershed and supplemental groundwater wells.

This is actually an advantage compared to cities that rely entirely on groundwater near contaminated sites. Surface water from the relatively undeveloped Union River watershed provides a cleaner starting point. But that doesn’t mean Bremerton’s water is free from concerns, particularly when it comes to emerging contaminants and the distribution system itself.

The Naval Shipyard Problem

Puget Sound Naval Shipyard has been in continuous operation since 1891. It’s the Pacific Northwest’s largest naval shore facility, and over more than a century of shipbuilding, repair, and decommissioning, the site has generated substantial contamination.

The Navy and EPA have identified multiple contamination zones at PSNS under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Contaminants documented at the shipyard include:

The shipyard sits directly on Sinclair Inlet, and decades of discharge have contaminated sediments in the surrounding waterways. The Washington Department of Ecology and the Navy have ongoing cleanup and monitoring programs, but contamination of this scale doesn’t resolve quickly.

PFAS: The Military’s Forever Chemical Legacy

PFAS contamination is arguably the most pressing water quality concern connected to the naval shipyard. AFFF — the firefighting foam that’s been standard equipment at military installations for decades — contains PFAS compounds that are essentially indestructible in the environment.

The Department of Defense has acknowledged PFAS contamination at hundreds of military installations nationwide, and PSNS is no exception. The Navy has conducted PFAS investigations at the Bremerton facility as part of its broader installation response program.

According to Department of Defense reporting, preliminary assessments and site inspections for PFAS have been conducted at PSNS [NEEDS VERIFICATION — specific PFAS concentration data from Navy sampling around PSNS pending latest DoD Environmental reporting]. The EPA’s 2024 MCLs set limits of 4 parts per trillion for PFOA and PFOS individually — levels so low that even minor contamination from a facility the size of PSNS could be significant.

The concern for Bremerton residents isn’t necessarily that PFAS from the shipyard is reaching their tap water — the city’s surface water sources are upstream and separate from the shipyard. The risk is more nuanced: groundwater contamination from the shipyard migrating through local aquifers, potential impacts on private wells in the area, and contamination of local seafood from Sinclair Inlet.

Stormwater and Industrial Runoff

Bremerton’s water quality challenges extend beyond the shipyard. The city’s industrial waterfront history means that stormwater runoff carries a cocktail of urban and industrial pollutants into Puget Sound and local waterways.

The Washington Department of Ecology has identified Sinclair Inlet and portions of Dyes Inlet as impaired water bodies under the Clean Water Act Section 303(d) listing. Contaminants of concern include mercury, PCBs, and fecal coliform bacteria.

While these surface water contamination issues don’t directly affect the city’s treated drinking water supply, they’re part of the broader environmental context that shapes Bremerton’s relationship with water quality. Residents who fish, harvest shellfish, or recreate in local waters face exposure pathways that drinking water treatment can’t address.

What’s Actually in Bremerton’s Tap Water

Bremerton’s most recent Consumer Confidence Report shows the city’s treated water meeting all federal and state drinking water standards. The city uses chloramine (a combination of chlorine and ammonia) for disinfection, which is effective but produces its own set of disinfection byproducts.

Notable findings from recent water quality reporting:

Washington State has been more proactive than many states on PFAS regulation. The state Department of Health established action levels for PFAS in drinking water, and the Department of Ecology has been investigating PFAS contamination statewide, with particular focus on military installations and airports.

The Aging Infrastructure Factor

Like many mid-sized cities in the Pacific Northwest, Bremerton is dealing with aging water infrastructure. Some of the city’s water mains date back to the early 20th century, and the ongoing challenge of maintaining and replacing this aging system affects water quality at the tap.

Old pipes can leach lead and copper, harbor biofilm that affects taste and safety, and develop leaks that allow contaminants to enter the distribution system. Bremerton has been investing in infrastructure upgrades, but it’s an expensive, decades-long process for any city.

Private Wells: A Different Risk Profile

Residents in unincorporated areas around Bremerton who rely on private wells face a different set of concerns. Private wells aren’t subject to the same testing and treatment requirements as public water systems, and in an area with documented military and industrial contamination, that’s a significant gap.

The Kitsap County Health District recommends annual testing for private wells and provides information about common contaminants in the region. Given PSNS’s PFAS contamination footprint, well owners near the shipyard should specifically request PFAS testing in addition to standard water quality panels.

What Bremerton Residents Should Do

  1. Check your CCR — The city publishes annual water quality data. Read it, especially the lead/copper results and any PFAS updates.
  2. Know your pipes — If your home was built before 1986, you may have lead solder or lead service lines. The city can help you determine if your service line contains lead.
  3. Flush before drinking — If water has been sitting in pipes for several hours, run the cold tap for 30 seconds to 2 minutes before using it for drinking or cooking. This reduces lead exposure from household plumbing.
  4. Test private wells — If you’re on a private well anywhere near the shipyard or in industrial areas, get comprehensive testing including PFAS.
  5. Be cautious with local seafood — Washington Department of Health fish consumption advisories apply to portions of Sinclair Inlet due to PCB and mercury contamination.

Treatment Options

For Bremerton residents wanting additional protection:

If you’re concerned about your water quality, a certified water treatment professional can test your water and advise on solutions.