C58/100
Marietta Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 32,375 residents · Ohio
What's In Marietta's Tap Water?
67
Contaminants Tested
3
Exceed EPA Limits
0
Above EPA Goals
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 50.00 mg/L | 1.30 mg/L | Over Limit |
PFOS | 0.004 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.004 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
MARIETTA CITY PWS
Population Served
18,707
Water Source
Groundwater
System ID
OH8400412
PUTNAM COMMUNITY WATER ASSOCIATION PWS
Population Served
2,744
Water Source
Groundwater
System ID
OH8400712
RENO WATER AND SEWER 1
Population Served
2,189
Water Source
Purchased Groundwater
System ID
OH8402503
WARREN COMM W AND S ASSN 2
Population Served
7,215
Water Source
Groundwater
System ID
OH8402703
RENO WATER AND SEWER 2
Population Served
1,520
Water Source
Purchased Groundwater
System ID
OH8402803
Frequently Asked Questions About Marietta Water
Is Marietta tap water safe to drink?
Marietta, Ohio tap water receives a grade of C (58/100), which is considered fair. 3 contaminant(s) exceed EPA maximum contaminant levels and 97 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Marietta's water?
Of the 74 contaminants tested in Marietta's water supply, the most notable include Copper (90th percentile), PFOA, PFOS, Lead (90th percentile). 3 contaminant(s) exceed EPA legal limits (MCLs). 4 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Marietta have any water quality violations?
Yes, Marietta has 97 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR, TT. 11 of these are health-based violations, which are the most serious category.
Do I need a water filter in Marietta?
Based on EPA data, using a water filter in Marietta is recommended. 3 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Marietta's tap water come from?
Marietta's drinking water is sourced from groundwater and supplied by MARIETTA CITY PWS and 4 other water system(s). The system serves approximately 32,375 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Marietta's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Marietta's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Marietta's water compare to other cities in Ohio?
Marietta's water quality score of 58/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Ohio state page to see how all cities in the state compare.
What should I do if I'm concerned about Marietta's water quality?
If you have concerns about Marietta's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MARIETTA CITY PWS) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.