Sand Springs Water Hardness & Quality Report (2026)

Sand Springs, Oklahoma, in Tulsa County — a Tulsa County city on the Arkansas River west of Tulsa, a historic oil refining and manufacturing community founded by oil baron Charles Page as a company town in the early 20th century — receives its municipal water from the Sand Springs Utilities or the Tulsa Metropolitan Utility Authority, which draws from Keystone Lake (an Army Corps of Engineers impoundment on the Arkansas River west of Sand Springs) or from the Tulsa water system.

The extremely hard 344.5 mg/L hardness and high TDS of 870.9 mg/L reflect the Arkansas River at Keystone's extreme Pennsylvanian carbonate geology. The Arkansas River above Keystone Lake drains the Osage Hills and Cherokee Plains of northeastern Oklahoma — terrain underlain by the Pennsylvanian Verdigris Limestone, Bluejacket Sandstone, and Seminole Formation (the Kansas-Oklahoma cyclothem limestone and calcareous shale sequence), and the Mississippian Boone Formation (cherty carbonate — the same formation that makes northeast Oklahoma spring water extremely hard). These Mississippian-Pennsylvanian carbonate-rich formations produce the extreme dissolved calcium and bicarbonate characteristic of the northeastern Oklahoma-Arkansas River corridor supplies.

At 344.5 mg/L with TDS 871 mg/L, Sand Springs' water is extremely hard — one of the hardest supplies in this dataset. A whole-house water softener is essential and kitchen reverse osmosis filtration is strongly recommended. The PFAS level of 6.0 ppt warrants a certified drinking water filter — the Tulsa oil refining and petrochemical complex (one of the largest petroleum refinery concentrations in the Midwest), the former Tulsa Port of Catoosa industrial corridor, and the Oklahoma defense-manufacturing PFAS background contribute to Sand Springs' PFAS readings.