Callao, Missouri Water Quality Report
Water quality data for 1 water system serving 311 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (8)
71
Jul 1, 2025
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (47)
3A
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
66
Oct 1, 2024
3A
Mar 1, 2024 — Mar 31, 2024
+ 42 more resolved violations
Frequently Asked Questions
Is Callao tap water safe to drink?
Callao's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Callao tap water?
0 contaminants have been detected in Callao's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Callao?
Install a water filter rated for the specific contaminants found in Callao's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Callao have any water quality violations?
Yes, Callao currently has 8 active violations. See the violations section above for details.