Paris Water Hardness & Quality Report (2026)

Paris, Texas, in Lamar County near the Texas-Oklahoma border in northeast Texas, receives its municipal water from the City of Paris Water Utilities, drawing from Pat Mayse Lake — an Army Corps of Engineers reservoir on the North Sulphur River in Lamar County — and local groundwater wells blending supplementary supply. The North Sulphur River is a tributary of the Red River, draining the East Texas Blacklands and Cretaceous outcrop terrain of the Southern Interior Plains. Pat Mayse Lake provides the primary surface water supply for Paris and surrounding Lamar County communities.

The very hard 269 mg/L hardness and elevated TDS of 712.1 mg/L reflect the combined mineral influence of the Red River basin's carbonate and evaporite geology. The North Sulphur River drainage basin crosses Cretaceous Austin Chalk, Taylor Marl, and Eagle Ford Shale formations — calcium-rich calcareous rock types deposited in the Cretaceous Western Interior Seaway. Closer to the Oklahoma border, the Red River system receives drainage from Permian red bed formations containing significant gypsum (calcium sulfate) dissolution, adding sulfate to the already calcium-carbonate-rich supply and elevating both hardness and TDS substantially.

At 269 mg/L, Paris, Texas has very hard water producing persistent mineral scaling throughout all home systems. Scale accumulates aggressively in kettles and appliances, dishwashers leave heavy white deposits on glassware, and the mineral taste of the tap water is pronounced at this TDS level. Showerheads and faucet aerators clog frequently. Descaling appliances every four to six weeks is practical, and a whole-house water softener is a common and practical investment in this northeast Texas community. The PFAS level of 8.8 ppt warrants a certified reverse osmosis system for all drinking and cooking water.