CITY REPORT
WA
Black Diamond, WA Water Quality Report
1 ZIP code · 5 water systems · Updated 2026-03-16
Data: EPA SDWIS Last verified: 2026-03-16
1
ZIP Codes
5
Water Systems
0
ZIPs with Violations
Zone 1
Radon Risk (High)
Overview
We track water quality and home safety data for 1 ZIP code in Black Diamond, Washington, covering 5 community water systems serving approximately 2,420 people.
No EPA violations recorded across any ZIP codes in Black Diamond — an excellent indicator of water quality.
Water Sources
Black Diamond water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Black Diamond
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 98010 | — | BLACK DIAMOND WATER DEPT | 2,420 |
All ZIP Codes in Black Diamond
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.