Soddy-Daisy Water Hardness & Quality Report (2026)

North West Utility District supplies Soddy-Daisy and nearby communities in Hamilton County, Tennessee, including Mowbray and parts of the Trojan Run Subdivision. Most customers get their water from Soddy Lake, a reservoir northeast of town within the Tennessee River watershed. Residents of Trojan Run are served by Hixson Utility District. Water treatment is handled by NWUD at their facilities, distributing the supply to homes and businesses near the Tennessee River.

Soddy Lake is situated in the Sequatchie Valley, a region geologically defined by folded Appalachian bedrock. This area is rich in Paleozoic carbonate rocks, including Ordovician limestone and Mississippian formations. As surface water flows over and interacts with these mineral-rich layers, particularly limestone and dolomite, it picks up dissolved ions. This natural process results in a moderately mineralized water supply, reflecting the geology without the extreme hardness often found in deeper, more soluble karst environments.

Homeowners often notice scale buildup in appliances like dishwashers, washing machines, and water heaters, which can reduce their efficiency within 3-5 years. You might also find faucet aerators and showerheads clogging more frequently, along with spotted dishes and a feeling of dry skin after showering. Simple measures like monthly vinegar rinses or annual descaling can help manage this mineral content. For a more significant improvement in appliance longevity and soap effectiveness, installing a whole-house water softener is frequently recommended by users experiencing these issues. The NWUD's 2024 report noted compliance with federal standards for lead, copper, coliforms, and disinfection byproducts, though the supply is considered reasonably susceptible to watershed contaminants.