Population Served
21.4K
Service Connections
3.3K
Total Violations
106
Health-Based Violations
63
Lead & Copper Data
Lead Level
Safe0.77 ppb
Action Level: 15 ppb (EPA) · Sampled: 2025-12-31
015 ppb action level
Copper Level
240000 ppb
Action Level: 1,300 ppb (EPA) · Sampled: 2022-12-31
Copper action level exceeded
System Details
- Water Source
- Purchased Surface Water
- System Type
- Community Water System
- City
- MANGILAO
- ZIP Code
- 96913
- Counties Served
- Guam
- Cities Served
- APRA HEIGHTS, ASAN, ADELUP, AGANA HEIGHTS, AGAT, ANIGUA, PIGO, PITI + 1 more
- Open Violations
- 0
- State
- Guam
Violation Summary
106
Total Violations
63
Health-Based
0
Open Now
Most recent violation: 2022-04-01
Explore Guam Water Quality
See all water systems, lead data, and violation trends for Guam.
Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: GU0000003.SafeWater Home