Population Served
11.0K
Service Connections
3.6K
Total Violations
102
Health-Based Violations
10
Lead & Copper Data
Lead Level
Elevated6.50 ppb
Action Level: 15 ppb (EPA) · Sampled: 2004-12-31
015 ppb action level
Copper Level
387000 ppb
Action Level: 1,300 ppb (EPA) · Sampled: 2004-09-30
Copper action level exceeded
System Details
- Water Source
- Groundwater
- System Type
- Community Water System
- City
- MASON
- ZIP Code
- 45040
- Counties Served
- Warren
- Cities Served
- MASON
- Open Violations
- 0
- State
- Ohio
Violation Summary
102
Total Violations
10
Health-Based
0
Open Now
Most recent violation: 1999-07-01
Explore Ohio Water Quality
See all water systems, lead data, and violation trends for Ohio.
Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: OH8300812.SafeWater Home