Moses Lake, Washington Water Quality Report
Water quality data for 33 water systems serving 36,801 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 35.6 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 356% | Above guideline |
| PFBS | 0.004 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.007 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.054 | 0.010 ug/L | 0.001 ug/L(EWG) | 541% | Above limit |
| PFOS | 0.052 | 0.004 ug/L | 0.300 ug/L(EWG) | 1305% | Above limit |
| PFPeS | 0.005 | No federal limit | — | — | No federal limit |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (2)
52
Jan 1, 2022
52
Jan 1, 2022
Resolved Violations (498)
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
03
Jul 1, 2025 — Sep 30, 2025
71
Jul 1, 2025
+ 493 more resolved violations
Frequently Asked Questions
Is Moses Lake tap water safe to drink?
Moses Lake's water has 2 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Moses Lake tap water?
6 contaminants have been detected in Moses Lake's water supply across 33 water systems. See the full contaminant table above for details.
How can I improve my water quality in Moses Lake?
Install a water filter rated for the specific contaminants found in Moses Lake's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Moses Lake have any water quality violations?
Yes, Moses Lake currently has 64 active violations. See the violations section above for details.