Woodward Water Hardness & Quality Report (2026)

Woodward, Oklahoma, in Woodward County — the Woodward County seat adjacent to Enid and Elk City on the North Canadian River in northwest Oklahoma — receives its water from the City of Woodward Water, drawing from Fort Supply Lake or Lake Optima (Woodward County) through the northwest Oklahoma distribution.

The extremely hard 372.5 mg/L hardness and TDS of 981.5 mg/L place Woodward among the hardest water communities in this dataset — reflecting the northwest Oklahoma Permian evaporite basin's gypsiferous and calcareous dissolution from the Permian Blaine Formation gypsum and Dog Creek Shale calcareous contacts. The semi-arid Woodward County evaporative concentration compounds the extreme TDS loading from the Permian salt plains (compare Florida City FL: 272 mg/L/852; Borger TX: 271.5 mg/L/721 on the Texas Panhandle Permian). The Fort Supply watershed at Woodward County — Permian Blaine Formation (highly gypsiferous — primary TDS contributor), Permian Dog Creek Shale (calcareous — primary hardness contributor), and Quaternary North Canadian alluvium (calcareous — secondary contributor).

At 372.5 mg/L with TDS 982, Woodward's water is extremely hard. A water softener is essential to prevent severe scale damage. A reverse osmosis system is required for drinking water. The PFAS level of 6.4 ppt warrants a certified drinking water filter — the Woodward County northwest Oklahoma industrial corridor contribute to Woodward's elevated readings.