Van Buren Water Hardness & Quality Report (2026)

Van Buren, Arkansas, in Crawford County on the Arkansas River directly across from Fort Smith — the western Arkansas gateway city at the Oklahoma border, part of the Fort Smith metropolitan area — receives its municipal water from the City of Van Buren Water and Sewer Department, drawing from the Arkansas River through the regional Fort Smith-Van Buren water supply infrastructure. Van Buren shares the Arkansas River supply corridor with the larger Fort Smith, AR, water system.

The moderately hard 186 mg/L hardness and TDS of 425.6 mg/L reflect the Arkansas River's watershed geology at the Crawford County reach. The Arkansas River at Fort Smith drains the Ozark Plateau of northwest Arkansas — composed of Ordovician St. Peter Sandstone, Devonian carbonate formations, and the characteristic Carboniferous Burlington-Keokuk limestone and Boone Formation chert-bearing limestone — along with contributions from the Ouachita Mountains of western Arkansas and eastern Oklahoma, which add Paleozoic shale and sandstone inputs. The combined carbonate and Ouachita drainage produces a moderately hard supply.

At 186 mg/L, Van Buren's water is moderately hard — consistent with the Fort Smith metro area's river supply. Scale builds in kettles and coffee machines within weeks to months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium rings. Quarterly descaling of heating appliances is the standard schedule. The PFAS level of 5.2 ppt is moderate for the Fort Smith metro area — Crawford County's position at the Arkansas-Oklahoma border and the regional industrial and military activity (Fort Chaffee) contribute to the PFAS background without reaching the highest levels seen in more heavily industrialized river corridors.