A
95

Excellent Water Quality

Marietta, GA 30067

Cobb County · Population served: 755,100 · Data updated March 2026

Water Systems Serving This Area

🏔
COBB COUNTY
Surface water · Pop. 695,000
PWSID: GA0670003
🏔
MARIETTA BOARD OF LIGHTS AND WATER
Surface water · Pop. 60,100
PWSID: GA0670005

PFAS / Forever Chemicals

5 detected All below limits
CompoundLevelEPA MCLHealth GuidelineStatus
PFBA6.5 pptNo standard500 pptUnregulated
PFHxA4.4 pptNo standard400 pptUnregulated
PFBS4.2 ppt2000 ppt100 pptBelow limit
PFPeA3.8 pptNo standardUnregulated
PFHxA3.2 pptNo standard400 pptUnregulated

Water Quality Summary

Understanding Your Water in Marietta

Tap water quality in Marietta, Georgia (30067) receives an overall grade of A (Excellent) with a score of 95 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 18 points above the Georgia state average of 77. Compared to the national average (75), this area performs significantly better. The area is served by 2 water systems providing water to approximately 755,100 people, using surface water sources. PFAS testing detected 5 compounds, all currently below EPA limits. The area has a clean violation record over the past 5 years — a positive indicator of consistent water quality management.

Your Score 95/100 A
vs State 18 pts above Georgia avg (77)
vs National 20 pts above national avg (75)

What a Grade A Means

A score of 95/100 means the water supply in Marietta, GA meets or exceeds all EPA standards with minimal issues. Contaminant levels are well within safe limits, and the water system has maintained a strong compliance record. While no water supply is guaranteed perfect at the tap due to household plumbing, this is among the best-scoring areas in the country.

Surface water: sourced from rivers, lakes, or reservoirs

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Marietta, Georgia receives a grade of A (Excellent) with a score of 95/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 30067 is served by 2 water systems using surface water sources, providing water to approximately 755,100 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.

No lead data is currently available for ZIP code 30067. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.

5 PFAS compounds were detected in water serving Marietta, Georgia, but all are currently below EPA limits. While levels are within regulatory standards, some health organizations recommend minimizing any PFAS exposure. Activated carbon or reverse osmosis filters can reduce PFAS levels.

Water systems serving Marietta, Georgia have zero violations in the last 5 years. This is a positive indicator of consistent regulatory compliance and water quality management.

Based on detected contaminants (PFAS), residents in Marietta, Georgia should consider: Reverse osmosis (RO) system — most effective for PFAS, lead, and other contaminants. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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