F0/100
Warren Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 51,951 residents · Ohio
What's In Warren's Tap Water?
70
Contaminants Tested
1
Exceed EPA Limits
2
Above EPA Goals
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 18.00 mg/L | 1.30 mg/L | Over Limit |
chlorate | 224.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – December 31, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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
LISBON VILLAGE
Population Served
2,821
Water Source
Groundwater
System ID
OH1501512
WARREN CITY PWS
Population Served
49,130
Water Source
Surface Water
System ID
OH7803811
Frequently Asked Questions About Warren Water
Is Warren tap water safe to drink?
Warren, Ohio tap water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 103 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Warren's water?
Of the 70 contaminants tested in Warren's water supply, the most notable include Copper (90th percentile), Lead (90th percentile), chlorate. 1 contaminant(s) exceed EPA legal limits (MCLs). 3 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Warren have any water quality violations?
Yes, Warren has 103 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, TT. 48 of these are health-based violations, which are the most serious category.
Do I need a water filter in Warren?
Based on EPA data, using a water filter in Warren is recommended. 1 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 Warren's tap water come from?
Warren's drinking water is sourced from groundwater and supplied by LISBON VILLAGE and 1 other water system(s). The system serves approximately 51,951 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Warren'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. Warren'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 Warren's water compare to other cities in Ohio?
Warren's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Ohio state page to see how all cities in the state compare.
What should I do if I'm concerned about Warren's water quality?
If you have concerns about Warren'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 (LISBON VILLAGE) 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.