Roswell Water Hardness & Quality Report (2026)

The Roswell Water Utility, operated by the City of Roswell in Fulton County, Georgia, serves approximately 100,000 residents in the northern suburbs of Atlanta. Primary water supply is treated at the Roswell Water Treatment Plant, sourcing from the Big Creek Watershed. Supplemental supply is purchased from the North Fulton/Atlanta Treatment Plant in Alpharetta, drawing from the Chattahoochee River. Some areas receive blended groundwater from local wells. The utility adheres to EPA and Georgia EPD standards through filtration, disinfection, and coagulation treatment processes.

The Chattahoochee River and Big Creek watersheds span the Piedmont region, characterized by rolling hills of ancient metamorphic and igneous rocks including gneiss, schist, and granite from the Precambrian era, with minimal sedimentary layers and no major limestone development. Groundwater comes from shallow fractured bedrock aquifers. Surface runoff from this non-calcareous bedrock introduces few calcium and magnesium ions, unlike limestone terrains, producing characteristically soft water with low dissolved mineral content.

As soft water, Roswell's supply poses minimal risk of scale buildup in pipes, water heaters, kettles, or dishwashers. Soap lathers easily, reducing detergent use, and fixtures remain cleaner without mineral deposits. No softener is needed or recommended. Water quality meets or exceeds EPA standards per utility reports, with ongoing monitoring for lead, copper, chlorine byproducts, and organics. Conventional treatment — coagulation, sedimentation, filtration, and chlorination — is applied at both plants; occasional taste or odor from natural compounds and disinfectants is managed but sometimes reported by residents.