Lewiston Orchards Water Hardness & Quality Report (2026)

Lewiston Orchards, Idaho, an unincorporated community in Nez Perce County — a major north Idaho community adjacent to Lewiston (Lewiston Orchards is a significant unincorporated Nez Perce County community on the Lewiston Orchards plateau above the Snake River Canyon — an agricultural community historically famous for its orchards (cherry and peach orchards were a major industry on the Lewiston Orchards plateau in the early 20th century, given the warm microclimate produced by the deep Snake River Canyon's thermal moderation); today Lewiston Orchards is primarily a residential community for Lewiston workers, with large single-family lots and a rural-suburban character), a diverse Nez Perce County community with a primarily working-class and agricultural heritage, adjacent to Lewiston and the Snake River Canyon overlooks, and home of a distinctive Idaho plateau community — draws its municipal water supply via the City of Lewiston Water Division. Water hardness in Lewiston Orchards measures 132.5 mg/L — classified as moderately hard.

Lewiston Orchards's moderate hardness reflects the same Clearwater River basin supply as the city of Lewiston. The Clearwater River watershed drains the Miocene Columbia River Basalt (calcareous-poor) mixed with Idaho Batholith granite, distributed to the Lewiston Orchards plateau zone, producing the moderate 132.5 mg/L.

At 132.5 mg/L, Lewiston Orchards residents encounter moderate scale accumulation. Monthly cleaning is recommended. City of Lewiston Water Division consistently delivers water meeting all Idaho DEQ and EPA Safe Drinking Water Act requirements.