Rogers Water Hardness & Quality Report (2026)

Rogers, Arkansas, in Benton County — one of Northwest Arkansas's fastest-growing cities in the Fayetteville–Springdale–Rogers–Bentonville metro (home of Walmart's global headquarters in neighboring Bentonville) — draws its municipal water supply from Beaver Lake (White River reservoir in Carroll and Benton Counties) via the Benton–Washington Regional Public Water Authority and Rogers Water Utilities, treating Beaver Lake water for the Northwest Arkansas metropolitan area. Water hardness in Rogers measures 131 mg/L — classified as moderately hard.

Rogers's moderate hardness reflects the Ozark Plateau White River–Beaver Lake watershed's calcareous character. The White River above Beaver Lake drains the Arkansas Ozarks — the Mississippian Burlington–Keokuk Limestone and Boone Formation (cherty calcareous limestone with abundant chert nodules — the 'Boone chert' is a defining Ozark geological feature); the Ordovician Gasconade Dolomite and Roubidoux Formation (calcareous dolomite); and the Devonian–Silurian Bailey Limestone (minor Ozark calcareous formation). The Ozark Plateau is a classic karst terrain — the White River–Beaver Lake system has sustained contact with the Boone Formation calcareous chert-limestone, producing the moderate 131 mg/L supply. The large Beaver Lake reservoir's dilution moderates the raw dissolved calcium from the Ozark limestone contact.

At 131 mg/L, Rogers residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. Rogers Water Utilities consistently delivers water meeting all Arkansas DEQ and EPA Safe Drinking Water Act requirements.