The Dalles, Oregon Water Quality Report
Water quality data for 7 water systems serving 18,390 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 47.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 470% | Above guideline |
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Compliance & Violations
Active Violations (3)
34
Jul 1, 2023
34
Jun 27, 2023
52
Oct 1, 2022
Resolved Violations (497)
27
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
71
Jul 1, 2025
03
Jul 1, 2025 — Sep 30, 2025
27
Jul 1, 2025 — Sep 30, 2025
+ 492 more resolved violations
Frequently Asked Questions
Is The Dalles tap water safe to drink?
The Dalles'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 The Dalles tap water?
1 contaminants have been detected in The Dalles's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in The Dalles?
Install a water filter rated for the specific contaminants found in The Dalles's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does The Dalles have any water quality violations?
Yes, The Dalles currently has 24 active violations. See the violations section above for details.