Farmington Water Hardness & Quality Report (2026)

Farmington, Utah, in Davis County north of Salt Lake City along the Wasatch Front — home to the popular Lagoon Amusement Park and the fast-growing Station Park shopping complex near the FrontRunner commuter rail corridor — receives its municipal water from the Farmington City Water Department, which draws from the Weber Basin Water Conservancy District and local Farmington Creek watershed supplies. The Weber Basin system draws from the Weber River and its Wasatch Range tributaries through multiple reservoir impoundments.

The moderately hard 189.5 mg/L hardness and TDS of 429.5 mg/L reflect the Wasatch Front's mixed carbonate and siliciclastic mountain geology. The Weber River and Farmington Creek drain the Wasatch Range — a complex of Proterozoic Farmington Canyon Complex (gneiss and schist), Cambrian quartzite and carbonate, Devonian dolomite, and the Mississippian Madison Formation limestone and dolomite sequence. The Mississippian Madison Formation is the key contributor of carbonate hardness throughout the Wasatch Front water supply, as spring discharge and river baseflow from this prolific karstic limestone formation sustains moderate to hard water in Weber Basin supplies throughout northern Utah.

At 189.5 mg/L, Farmington's water is moderately hard — consistent with the Davis County Wasatch Front supply profile. Scale builds in kettles and coffee machines over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling of heating appliances is the standard schedule. The PFAS level of 2.5 ppt is excellent — Farmington's Davis County position with the Wasatch Range municipal watershed protection and limited industrial PFAS sources in the northern Wasatch Front supply zone produces one of Utah's better PFAS readings.