County · Georgia
Cobb County, Georgia: drinking water records
This overview covers 19 ZIP codes and 5 community water systems in Cobb County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Cobb County GA0670003 | 695,000 | 120 | 3 | 0 | 2.6 ppb |
| Marietta Board of Lights and Water GA0670005 | 60,100 | 120 | 2 | 0 | 2.6 ppb |
| Smyrna GA0670007 | 40,508 | 120 | 2 | 0 | 2.6 ppb |
| Austell GA0670001 | 7,774 | 120 | 1 | 0 | 2.6 ppb |
| Cobb Co.-Marietta Water Auth. GA0670002 | 0 | 0 | 0 | 0 | 1.9 ppb |
ZIP reports in Cobb County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.