Black Diamond, Washington Water Quality Report
Water quality data for 6 water systems serving 3,152 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Resolved Violations (500)
71
Jul 1, 2025
03
Jan 1, 2022 — Dec 31, 2022
52
Jan 1, 2021
3A
Apr 1, 2019 — Apr 30, 2019
71
Jul 1, 2018
+ 495 more resolved violations
Frequently Asked Questions
Is Black Diamond tap water safe to drink?
Black Diamond's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Black Diamond tap water?
0 contaminants have been detected in Black Diamond's water supply across 6 water systems. See the full contaminant table above for details.
How can I improve my water quality in Black Diamond?
Install a water filter rated for the specific contaminants found in Black Diamond's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Black Diamond have any water quality violations?
Yes, Black Diamond currently has 10 active violations. See the violations section above for details.