Maple Valley, Washington Water Quality Report
Water quality data for 7 water systems serving 29,155 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBA | 0.012 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
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Compliance & Violations
Active Violations (14)
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Resolved Violations (459)
3A
Aug 1, 2025 — Aug 31, 2025
71
Jul 1, 2025
3A
May 1, 2025 — May 31, 2025
3A
Mar 1, 2025 — Mar 31, 2025
03
Jan 1, 2022 — Dec 31, 2022
+ 454 more resolved violations
Frequently Asked Questions
Is Maple Valley tap water safe to drink?
Maple Valley's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Maple Valley tap water?
1 contaminants have been detected in Maple Valley's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in Maple Valley?
Install a water filter rated for the specific contaminants found in Maple Valley's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Maple Valley have any water quality violations?
Yes, Maple Valley currently has 14 active violations. See the violations section above for details.