Brookhaven Water Hardness & Quality Report (2026)

Brookhaven, Georgia, in DeKalb County — one of the newest cities in Georgia (incorporated 2012), carved from unincorporated DeKalb County, a diverse northeast Atlanta community with large Korean-American, Indian-American, and young professional populations, anchored by the Town Brookhaven development and Peachtree Road corridor — draws its municipal water supply from the Chattahoochee River via the City of Atlanta Department of Watershed Management, distributed to Brookhaven by the City of Brookhaven Water and Sewer Division. Water hardness in Brookhaven measures 147.5 mg/L — classified as moderately hard.

Brookhaven's moderate hardness — harder than Smyrna (72 mg/L) but softer than the far northeast Atlanta suburbs — reflects the northeast DeKalb County distribution infrastructure's characteristics. Brookhaven's distribution zone includes infrastructure from the unincorporated DeKalb County era (1960s–2000s suburban build-out) with some older mains in the established Brookhaven–Ashford Park residential areas dating from the early post-war era. The Atlanta Watershed Management Chattahoochee supply, moderately treated, is distributed through the DeKalb County northeast suburban grid to produce the moderate 147.5 mg/L at Brookhaven.

At 147.5 mg/L, Brookhaven 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. City of Brookhaven Water and Sewer Division consistently delivers water meeting all Georgia EPD and EPA Safe Drinking Water Act requirements.