Toppenish, Washington Water Quality Report
Water quality data for 9 water systems serving 11,383 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 22.6 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 226% | Above guideline |
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Compliance & Violations
Active Violations (31)
4B
Jul 1, 2025
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
45
Jul 10, 2021
72
Oct 1, 2016
72
Oct 1, 2014
71
Jul 1, 2014
Resolved Violations (469)
27
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
27
Jul 1, 2025 — Jul 31, 2025
27
Jul 1, 2025 — Jul 31, 2025
27
Jul 1, 2025 — Jul 31, 2025
+ 464 more resolved violations
Frequently Asked Questions
Is Toppenish tap water safe to drink?
Toppenish'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 Toppenish tap water?
1 contaminants have been detected in Toppenish's water supply across 9 water systems. See the full contaminant table above for details.
How can I improve my water quality in Toppenish?
Install a water filter rated for the specific contaminants found in Toppenish's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Toppenish have any water quality violations?
Yes, Toppenish currently has 51 active violations. See the violations section above for details.