Bremerton Water Hardness & Quality Report (2026)

The City of Bremerton Water Utility serves approximately 41,405 residents in Bremerton, Washington, primarily in Kitsap County. The primary water source is the Union River, protected by a 3,000-acre watershed owned by the city. Treatment involves disinfection with chlorine and ultraviolet light, plus corrosion control to raise pH to approximately 8, preventing lead leaching from household plumbing. Naval Base Kitsap Bremerton purchases water from the city as a consecutive system, and the 2026 Annual Drinking Water Quality Report covers data from January to December 2025.

The Union River watershed on the Olympic Peninsula features ancient marine sedimentary rocks, including limestone and sandstone formations, which contribute calcium and magnesium carbonates to the surface water. Despite the presence of these minerals, the specific dissolution processes in this protected watershed result in a soft supply with low mineral content. Ongoing watershed protection and annual testing ensure consistent quality from this source, and no filtration is required due to the high source water quality.

Soft water in Bremerton minimizes scale buildup on fixtures and appliances, reducing maintenance needs for washing machines, pipes, and water heaters. Soap and detergent perform efficiently without excess usage, and fabrics maintain softness longer. The utility states that water softeners are generally not needed given the low mineral levels. Water pH is adjusted to about 8 for corrosion control, ensuring lead and copper compliance. The city tests for over 50 inorganic and organic compounds, all meeting federal and state standards; official annual drinking water quality reports confirm full compliance.