Marietta City Public Water System water quality
Marietta, OH · serves 18,707 people (6,468 connections) · Groundwater · Local government · EPA ID OH8400412
Data: U.S. EPA · How we read the data · How we check it
Summary
PFAS above the 2024 federal limits. Systems have until 2029 to meet the PFAS limits.
Is it an emergency? No: PFAS limits are about years of exposure, not a glass of water, and nothing in EPA's data calls for you to stop drinking the water today. If your utility ever issues a boil-water or do-not-drink notice, follow it.
- PFAS
- Above limitPFOA, PFOS above the federal limit in EPA's 2023–2025 testing (PFOA 4.65 ppt vs a limit of 4 ppt, PFOS 4.95 ppt vs a limit of 4 ppt, where ppt = parts per trillion).
- Lead
- Below action level0.7 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Jun 2026. Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Pregnant, or mixing baby formula with tap water? Babies drink more water for their size, so PFAS exposure matters more for them. Consider bottled water or a filter certified for PFAS for formula, and ask your doctor. Health effects.
- To lower your PFAS exposure now, a home filter certified for PFAS reduction works (reverse osmosis, or activated carbon certified to NSF/ANSI 53 or 58). Filters for these results.
- 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 City Public Water System'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 (740) 373-1387. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 1 entry point tested Nov 2024 to Jun 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 Above limit Limit 4 ppt | 4.65 ppt 1.16× the limit |
| PFOS Above limit Limit 4 ppt | 4.95 ppt 1.24× the limit |
| 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) Detected, below limit Limit 1 | 0.0022 |
| PFBS Detected, below limit Guideline 2,000 ppt | 4.5 ppt |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Not detected Guideline 3,000 ppt | – |
For context: the PFOA average is higher than at 95% of the Ohio systems EPA tested and the PFOS average is higher than at 94% of the Ohio systems EPA tested.
29 PFAS tested, 3 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 2 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 0.7 ppb lead (Jan 2026 – Jun 2026). Below action level
1 reported result in EPA's records is far above anything physically plausible (likely a unit or data-entry error) and is not used in the summary.
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2026 – Jun 2026 | 0.7 ppb |
| Jan 2022 – Dec 2024 | 0 ppb |
| Jan 2019 – Dec 2021 | 0 ppb |
Earlier results (9)
| Jan 2016 – Dec 2018 | 0 ppb |
| Jan 2013 – Dec 2015 | 0 ppb |
| Jan 2010 – Dec 2012 | 0 ppb |
| Jan 2008 – Dec 2010 | 0 ppb |
| Jan 2005 – Dec 2007 | 0 ppb |
| Jan 2002 – Dec 2004 | 5 ppb |
| Jun 2004 – Sep 2004 | Reported value looks erroneous |
| Jan 1999 – Dec 2001 | 5 ppb |
| Jan 1996 – Dec 1998 | 0 ppb |
Copper 90th percentile: 50 ppm (Sep 2004), action level 1,300 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
1 unresolved monitoring or reporting violation: Consumer Confidence Rule.
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 | 1.24 ppb | 300 ppb |
| Molybdenum | 2.2 ppb | 40 ppb |
| Strontium | 0.11 ppm | 1.5 ppm |
| Vanadium | 0.27 ppb | 21 ppb |
| Chromium-6 | 0.18 ppb | – |
| 1,4-Dioxane | 0.12 ppb | 0.35 ppb |
Where it serves
Marietta
ZIP codes the system reported serving: 45750
Nearby utilities
- Caldwell Village Public Water System Caldwell · 23 mi · PFAS above limit
- Barnesville Water System Barnesville · 42 mi · PFAS above limit
- City of Cambridge Cambridge · 42 mi · PFAS above limit
- Guernsey County Water Dept. Old Washington · 42 mi · PFAS above limit
- St. Clairsville, City of Public Water System St. Clairsville · 54 mi · PFAS above limit
- Gallipolis Public Water System Gallipolis · 58 mi · PFAS above limit
Questions
Is Marietta City Public Water System water safe to drink?
Marietta City Public Water System has no health-based violations since 2016. EPA testing found PFAS above the 2024 federal limits, which systems must meet by 2029. 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 City Public Water System water have PFAS?
Yes. EPA's 2023–2025 testing of Marietta City Public Water System found 3 PFAS at least once. The highest entry-point averages were above the federal limit for PFOA and PFOS: PFOA 4.65 ppt, PFOS 4.95 ppt (limit 4 ppt for PFOA and PFOS, 10 ppt for the others).
What is the lead level in Marietta City Public Water System water?
The most recent 90th-percentile lead result for Marietta City Public Water System is 0.7 ppb, for the period ending Jun 2026. 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 OH8400412: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID OH8400412).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Marietta City Public Water System at (740) 373-1387, 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.