Hollister, Missouri Water Quality Report
Water quality data for 12 water systems serving 5,726 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (4)
71
Jul 1, 2025
71
Jul 1, 2025
72
Jul 1, 2024
71
Jul 1, 2024
Resolved Violations (496)
31
Jul 1, 2025 — Jul 31, 2025
31
Jul 1, 2025 — Jul 31, 2025
31
Jul 1, 2025 — Jul 31, 2025
31
Mar 1, 2025 — Mar 31, 2025
31
Mar 1, 2025 — Mar 31, 2025
+ 491 more resolved violations
Frequently Asked Questions
Is Hollister tap water safe to drink?
Hollister'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 Hollister tap water?
0 contaminants have been detected in Hollister's water supply across 12 water systems. See the full contaminant table above for details.
How can I improve my water quality in Hollister?
Install a water filter rated for the specific contaminants found in Hollister's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Hollister have any water quality violations?
Yes, Hollister currently has 84 active violations. See the violations section above for details.