El Reno Water Hardness & Quality Report (2026)

El Reno, Oklahoma, in Canadian County — the Canadian County seat adjacent to Yukon and Weatherford, a historic Route 66 city west of Oklahoma City, in the central Oklahoma Southern Plains — receives its municipal water from the El Reno Water Division, drawing from Canton Lake (North Canadian River, Blaine County) through the Western Oklahoma Water System.

The moderately hard 103.5 mg/L hardness and TDS of 166.6 mg/L reflect the North Canadian River's Permian redbed watershed character — softer than some Oklahoma Permian basin supplies because Canton Lake's large reservoir volume buffers the more soluble Permian salt-gypsum zones. The North Canadian River drains the Southern Plains (Permian Hennessey Group redbeds — calcareous red clay and siltstone), the Permian Enid Formation (gypsiferous — limited dissolution in the Canton watershed), and the Quaternary alluvium of the Canadian River valley, producing the moderately hard supply.

At 103.5 mg/L, El Reno's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 2.8 ppt is very good — the rural Canton watershed and the absence of major military or industrial PFAS sources in the North Canadian-Canadian County corridor produce one of the cleaner Oklahoma supplies.