Aloha Water Hardness & Quality Report (2026)

Aloha, Oregon, an unincorporated community in Washington County west of Beaverton — a major Portland western suburban community, one of the largest unincorporated communities in Oregon, known for a diverse working-class and middle-class community with large Hispanic-American, Vietnamese-American, and Pacific Islander populations — draws its municipal water supply from the Tualatin River (Hagg Lake Reservoir) via the Tualatin Valley Water District (TVWD). Water hardness in Aloha measures 68.5 mg/L — classified as moderately soft.

Aloha's moderate softness — slightly harder than neighboring Tigard (38.5 mg/L) — reflects the TVWD supply characteristics in the Washington County western suburban zone. The Tualatin Valley Water District serves the Washington County suburban corridor (Beaverton, Hillsboro, Tigard, Aloha) on the same Hagg Lake–Tualatin River supply. The TVWD transmission and distribution infrastructure in the Aloha zone — a less modern section of the TVWD system than some of the newer Hillsboro tech corridor mains — contributes moderate additional mineral accumulation, producing the moderate 68.5 mg/L — still very soft relative to most US communities but slightly harder than the Tigard–Portland zones.

With hardness at 68.5 mg/L, Aloha residents enjoy moderately soft water. Tualatin Valley Water District consistently delivers water meeting all Oregon DEQ and EPA Safe Drinking Water Act requirements.