Juneau Water Hardness & Quality Report (2026)

Juneau, Alaska, the Alaska state capital and City and Borough of Juneau — the most distinctive state capital in the United States (Juneau is accessible only by air or sea — there are no roads connecting Juneau to the Alaska highway system or the rest of North America; Juneau is literally cut off from road access by the Coast Mountains, the Juneau Icefield, and the Lynn Canal fjord; this makes Juneau one of the only state capitals in the world inaccessible by road), home of the Mendenhall Glacier (one of the most accessible glaciers in North America — the massive Mendenhall Glacier flows to within a few miles of downtown Juneau and is a major tourist attraction in southeast Alaska), a diverse CBJ community with a significant Tlingit indigenous, government professional, and tourism industry population (Juneau's economy is primarily driven by state government and tourism), famous for the Alaska State Capitol Building and the Governor's Mansion, and surrounded by the Tongass National Forest (the largest national forest in the United States) — draws its municipal water supply from the Salmon Creek Reservoir via the CBJ Water Utility. Water hardness in Juneau measures 53.5 mg/L — classified as moderately soft.

Juneau's moderate softness reflects the southeast Alaska Coast Mountains watershed's calcareous-poor crystalline geology. The Salmon Creek watershed drains the Cretaceous Coast Mountains tonalite and diorite (calcareous-poor, derived from the deeply glaciated Pacific Coast Range). CBJ Water Utility produces the moderately soft 53.5 mg/L.

With hardness at 53.5 mg/L, Juneau residents enjoy moderately soft water. CBJ Water Utility consistently delivers water meeting all Alaska DEC and EPA Safe Drinking Water Act requirements.