Newnan Water Hardness & Quality Report (2026)

Newnan, Georgia, the Coweta County seat — a major west Georgia Piedmont community south of Atlanta (Newnan is the Coweta County seat and a major I-85 southwest Atlanta suburban community), a rapidly growing Atlanta exurban community with significant population growth in the post-2000 era, historically known as the 'City of Homes' for its antebellum architecture (Newnan has an exceptionally large number of antebellum homes for a Georgia city of its size — many survived Sherman's March because Newnan served as a Confederate hospital city), and a diverse Coweta County community — draws its municipal water supply from the Shoal Creek watershed via the City of Newnan Water Works. Water hardness in Newnan measures 142.5 mg/L — classified as moderately hard.

Newnan's moderate hardness reflects the west Georgia Piedmont watershed's calcareous-moderate crystalline geology. The Shoal Creek watershed at Newnan–Coweta County drains: the Inner Piedmont Belt (Precambrian–Paleozoic calcareous-moderate Henderson Gneiss and Tallulah Falls Formation metasediment — the Georgia–Alabama Inner Piedmont crystalline belt with calcareous amphibolite and calcareous schist); and the Uchee Belt calcareous metasediment of the western Georgia Piedmont. City of Newnan Water Works treatment produces the moderate 142.5 mg/L.

At 142.5 mg/L, Newnan residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. City of Newnan Water Works consistently delivers water meeting all Georgia EPD and EPA Safe Drinking Water Act requirements.