Hollister, Idaho Water Quality Report
Water quality data for 1 water system serving 220 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (1)
Violation
Unknown
Resolved Violations (106)
27
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
27
Jun 1, 2025 — Jun 30, 2025
27
Jul 1, 2023 — Sep 30, 2023
+ 101 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 1 water system. 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 1 active violation. See the violations section above for details.