The City of Stone Mountain lists DeKalb County Watershed Management as its water and sewer provider, and the county report doesn't give hardness, so test before buying a softener. About 66% of city homes were built between 1960 and 1989, so older plumbing is common. Call the number on this page to be connected with a local plumber in Stone Mountain.

How the call goes
You'll be connected with an independent plumber who serves Stone Mountain. Let them know whether you're inside the historic village's city limits or in the larger unincorporated Stone Mountain-mailing area, since permits differ. Describe what you see, on which taps, and any existing equipment.
A visit usually includes a hardness test, a look at the heater and visible supply pipe, and a recommendation that fits.
Cost drivers
- Treatment versus pipe or heater work
- Pipe condition where equipment would connect
- A drain and outlet nearby
- Permit requirements
- Salt and cartridges over time
Stone Mountain's water and housing
The historic village sits at the western base of Stone Mountain, with a preserved Main Street from around 1900. City Public Works doesn't handle water or sewer; DeKalb County Watershed Management does, and takes water and sewer calls at (770) 270-6243. DeKalb treats Chattahoochee River water at the Scott Candler plant. We found no hardness figure, so test at your tap.
The median home in the city dates to 1979, about 52% predate 1980, and roughly 66% were built between 1960 and 1989. In that stock, rust, grit and falling pressure usually trace to galvanized supply pipe or old heaters, which a filter can't fix. DeKalb owns the line from the main to the meter, including the meter; the owner is responsible from the meter to the home's plumbing. Permits for the city are processed by Permit Service Group for the city, with inspections by SAFEbuilt, and the city asks residents to contact City Hall before any construction. Unincorporated Stone Mountain-mailing areas go to DeKalb County instead.
Before the plumber arrives
- Confirm whether you're inside city limits
- Note whether discoloration is hot, cold or both
- Check the water heater's age
- Clear access to the main shutoff
The usual order in a house this age: pipes and heater first, then a hardness test, then treatment only if the test shows a reason.
In the village's older homes, the plumber may also recommend a pressure check, since narrowed pipe often shows up as weak flow before it shows up as rust.
Water Softeners & Filtration questions in Stone Mountain
Does my water utility publish a hardness number?
Why does my water sometimes look rusty or cloudy?
Who owns the pipe where a whole-house unit goes?
Does installing a softener or whole-house filter need a permit?
More plumbing services in Stone Mountain
Water Softeners & Filtration nearby
Helpful guides
Sources
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