Smithfield Water Hardness & Quality Report (2026)

Smithfield, Utah, in Cache County — a Cache County city adjacent to Logan and Hyde Park on the Blacksmith Fork River in the Cache Valley — receives its water from the City of Smithfield Water Department, drawing from the Blacksmith Fork River and local wells through the north Utah distribution.

The extremely hard 314.5 mg/L hardness and very high TDS of 965.5 mg/L reflect the Cache County Cache Valley supply's extreme calcareous-evaporitic character — the Permian Park City Formation is a highly calcareous marine formation, while the Cambrian Ute Formation contains evaporitic limestone beds; Cache Valley groundwater concentrates these evaporitic minerals from both the Bear River Range carbonates and the ancient Lake Bonneville lake bed sediments (compare Logan UT: 309/951 in Cache County comparable; Hyde Park UT: 319/978 in Cache County comparable; Smithfield consistent extremely hard from the same Cache County Blacksmith Fork River Cache Valley evaporitic supply). The Cache Valley supply — Permian Park City Formation (highly calcareous — primary hardness contributor), Cambrian Ute Formation (evaporitic calcareous — secondary contributor), and Quaternary Lake Bonneville sediment (evaporitic — TDS contributor).

At 314.5 mg/L with TDS 966, Smithfield's water is extremely hard — a whole-house water softener is essential. A reverse osmosis system is strongly recommended for drinking due to very high TDS. The PFAS level of 4.6 ppt is moderate — a certified drinking water filter provides added protection. Review the City of Smithfield's annual water quality report.