What is in Clarksville's tap water?

Clarksville Gas & Water (CGW) treats Cumberland River water at the Clarksville Water Treatment Plant and pipes it to the city and parts of Montgomery County. This shelf collects the numbers a household can check for itself: what the yearly report measured, how hard the water is, what the service lines are made of, and what changes when a house runs on its own well.

The annual report, line by line

The city's 2025 drinking water report shows every regulated reading inside its limit. Our water quality report page sets each result against its federal maximum, explains why chlorine byproducts sit closest, and notes that all 29 PFAS compounds tested came in below reporting levels.

Hardness and what it does

At a 97 mg/L average, Clarksville's water lands in the moderately hard band of the USGS scale. The water hardness page converts that to grains for softener and dishwasher settings, shows the 2025 range, and explains why a softener here is a comfort choice rather than a need.

Service lines and lead

CGW's public map lists no lead lines, but it flags several thousand galvanized lines on the homeowner's side of the meter, the part a household answers for. The lead service lines page shows our count by material, how to look up an address, and the June 2024 tap results.

Private wells outside the system

Homes on a well are outside the city report altogether. TDEC's well water page sets no testing rule and recommends a yearly bacteria test. The well water in Montgomery County page covers the four yearly tests, setback distances from septic systems, and what to do after a flood.

Pipe and freeze questions sit on the pipes shelf, and how we check every figure is set out under methods and sources.