Collierville Water Hardness & Quality Report (2026)

Collierville, Tennessee, in Shelby County east of Memphis — one of the most affluent communities in Tennessee, a rapidly growing Memphis east suburban community known for its charming Town Square and historic district, excellent schools, and the headquarters of FedEx Office (formerly Kinko's) and several major healthcare corporations — draws its municipal water supply from the Memphis Sand Aquifer (Memphis Aquifer) via the Town of Collierville Water Utilities. Water hardness in Collierville measures 188 mg/L — classified as hard.

Collierville's hard supply — harder than many Memphis-area communities on the same Memphis Aquifer (Memphis proper 150 mg/L) — reflects the Collierville zone's deeper Memphis Sand pumping characteristics. The Memphis Sand Formation (Eocene Claiborne Group Memphis Sand — the world-class deep sand aquifer underlying much of southwest Tennessee and north Mississippi) is primarily a calcium-poor siliceous sand aquifer. However, at Collierville's deeper and farther-from-recharge pumping zone, the Memphis Sand has longer groundwater residence time in the calcareous Eocene marine sediment sequence, allowing more dissolved mineral accumulation. The deeper Collierville Memphis Sand zone produces the hard 188 mg/L — harder than the shallower Memphis urban wells.

At 188 mg/L, Collierville residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. Town of Collierville Water Utilities consistently delivers water meeting all Tennessee TDEC and EPA Safe Drinking Water Act requirements.