Mason City, Iowa Water Quality Report
Water quality data for 1 water system serving 27,338 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 92.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 920% | Above guideline |
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Compliance & Violations
Resolved Violations (500)
3A
Jun 1, 2024 — Jun 30, 2024
3A
Jun 1, 2024 — Jun 30, 2024
3A
Jun 1, 2024 — Jun 30, 2024
3A
Jun 1, 2024 — Jun 30, 2024
22
Aug 1, 2012 — Aug 31, 2012
+ 495 more resolved violations
Frequently Asked Questions
Is Mason City tap water safe to drink?
Mason City'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 Mason City tap water?
1 contaminants have been detected in Mason City's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Mason City?
Install a water filter rated for the specific contaminants found in Mason City's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Mason City have any water quality violations?
Yes, Mason City currently has 10 active violations. See the violations section above for details.