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Tap water quality report

Cobb Co.-Marietta Water Auth.

EPA monitoring tested this supplier for 1 contaminant and detected 1. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

1
contaminants tested
1
detected
0
people served
0
health-based violations
Georgia rankingsLead in GeorgiaPFAS in Georgia
Water source
Surface water
Ownership
Local government
Counties served
Cobb

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
15
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
MR Monitoring Resolved 2020-01-01 → 2025-12-31
Other Monitoring Resolved 2004-07-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0029 mg/L 19%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2026

Utility contact

Contact
BLACKWELL, COLE
Phone
770-514-5344
Email
cblackwell@ccmwa.org

Frequently asked questions about Cobb Co.-Marietta Water Auth.

Is Cobb Co.-Marietta Water Auth. tap water safe to drink?

EPA monitoring detected 1 contaminant in Cobb Co.-Marietta Water Auth.'s water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Cobb Co.-Marietta Water Auth.'s water?

EPA monitoring detected Lead. The full list with the level and data source for each is above.

How many people does Cobb Co.-Marietta Water Auth. serve?

Cobb Co.-Marietta Water Auth. reports serving 0 people in Georgia, per its EPA record.

Has Cobb Co.-Marietta Water Auth. had any water quality violations?

The EPA has 15 violations on file for Cobb Co.-Marietta Water Auth., of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.