Marietta Board of Lights and Water water quality
Marietta, GA · serves 60,100 people (18,100 connections) · Purchased surface water · Local government · EPA ID GA0670005
Data: U.S. EPA · How we read the data · How we check it
Buys water from Cobb County – Marietta Water Authority, Cobb County Water System. Treated water bought from another system can carry that system's contaminants.
Summary
No limits exceeded in the data EPA has, but the record is incomplete: no lead results since 2003.
- PFAS
- Detected, below limit2 of 29 PFAS found at least once. All averages below the federal limits.
- Lead
- Out of dateEPA's national database has no lead results for this system since 2003 (then 2.6 ppb, 90th percentile). Systems this size normally test every one to three years, so this most likely means newer results were not reported to EPA, not that testing stopped. Ask the utility for its latest results.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Marietta Board of Lights and Water's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (770) 794-5502. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 1 entry point tested Jan 2025 to Oct 2025. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Detected, below limit Guideline 3,000 ppt | 1.1 ppt |
| PFPeA Detected, no limit | 1.8 ppt |
29 PFAS tested, 2 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 4 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 2.6 ppb lead (Jan 2003 – Dec 2003). No results since 2003
This is the newest lead result in EPA's national database. Utilities report lead results to their state, and states pass them to EPA. Gaps like this usually mean the newer results did not reach EPA's database, not that the utility stopped testing. Results this old may not reflect the water today. Ask the utility or your state drinking water program for the latest lead monitoring.
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2003 – Dec 2003 | 2.6 ppb |
| Jan 2002 – Dec 2002 | 13.7 ppb |
| Jan 2001 – Dec 2001 | 10 ppb |
Earlier results (1)
| Jan 2000 – Dec 2000 | 12 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 2.2 ppb | 300 ppb |
| Chlorate | 369 ppb | 210 ppb |
| Chromium-6 | 0.09 ppb | – |
| Strontium | 0.037 ppm | 1.5 ppm |
Where it serves
Marietta
ZIP codes the system reported serving: 30008, 30060, 30062, 30064, 30066, 30067, 30068
Nearby utilities
- Cobb County Water System Marietta · same area
- Woodstock Water System Woodstock · 10 mi · PFAS above limit
- City of Atlanta Department of Watershed Management Atlanta · 15 mi
- Paulding County Water System Dallas · 17 mi
- North Fulton County Water System Alpharetta · 17 mi
- Douglasville-Douglas County Water & Sewer Authority Douglasville · 17 mi
Questions
Is Marietta Board of Lights and Water water safe to drink?
Marietta Board of Lights and Water has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Marietta Board of Lights and Water water have PFAS?
Yes. EPA's 2023–2025 testing of Marietta Board of Lights and Water found 2 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Marietta Board of Lights and Water water?
The most recent 90th-percentile lead result for Marietta Board of Lights and Water is 2.6 ppb, for the period ending Dec 2003, which is more than five years old. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for GA0670005: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID GA0670005).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Marietta Board of Lights and Water at (770) 794-5502, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.