Magna Water Hardness & Quality Report (2026)

Magna, Utah, in Salt Lake County — a major west Salt Lake Valley industrial and community (Magna is a significant Salt Lake County unincorporated community — a west Salt Lake Valley community adjacent to West Valley City and Kearns; Magna is the home of Rio Tinto Kennecott's Magna concentrating and smelting facilities (Kennecott Utah Copper — one of the largest copper mining and processing operations in the Western Hemisphere; the Bingham Canyon Mine (the Kennecott open-pit copper mine) is the largest man-made excavation on earth; the Magna concentrator, smelter, and refinery are the processing facilities for all the copper ore extracted from Bingham Canyon; Kennecott's operations are one of the most significant industrial enterprises in Utah history and are a dominant feature of the west Salt Lake Valley economic landscape)); Magna is known for its diverse immigrant population (Magna historically attracted immigrant workers to the Kennecott smelter — Greek-American, Italian-American, Croatian-American, and later Hispanic-American communities established deep roots in Magna through the copper industry), a diverse Salt Lake County community with a significant Hispanic-American, Pacific Islander-American, and working-class industrial heritage population — draws its municipal water supply via the Salt Lake County Water Works. Water hardness in Magna measures 237 mg/L — classified as very hard.

Magna's very hard supply reflects the west Salt Lake County closed-basin evaporite aquifer's calcareous character. The Jordan River and well water blend draws from Quaternary calcareous Lake Bonneville lacustrine deposits, and limited softening produces the very hard 237 mg/L.

At 237 mg/L, Magna residents face significant hard water challenges. Regular water softeners and descaling are strongly recommended. Salt Lake County Water Works consistently delivers water meeting all Utah DEQ and EPA Safe Drinking Water Act requirements.