Marshalltown, Iowa Water Quality Report
Water quality data for 15 water systems serving 34,613 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 20.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 200% | Above guideline |
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Compliance & Violations
Active Violations (6)
75
Dec 15, 2023
75
Dec 15, 2023
75
Dec 15, 2023
75
Apr 29, 2023
75
Apr 29, 2023
75
Apr 29, 2023
Resolved Violations (494)
27
Aug 1, 2025 — Aug 31, 2025
27
Aug 1, 2025 — Aug 31, 2025
3A
Aug 1, 2024 — Aug 31, 2024
3A
Aug 1, 2024 — Aug 31, 2024
3A
Aug 1, 2024 — Aug 31, 2024
+ 489 more resolved violations
Frequently Asked Questions
Is Marshalltown tap water safe to drink?
Marshalltown'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 Marshalltown tap water?
1 contaminants have been detected in Marshalltown's water supply across 15 water systems. See the full contaminant table above for details.
How can I improve my water quality in Marshalltown?
Install a water filter rated for the specific contaminants found in Marshalltown's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Marshalltown have any water quality violations?
Yes, Marshalltown currently has 339 active violations. See the violations section above for details.