B69/100
WISTER — Water Quality Report 2026
Serving 1,002 people · Oklahoma
Water Source
Purchased Surface Water
County
—
System ID
OK3004014
Violations
27
Contaminant Test Results
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – December 4, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – December 15, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About WISTER
Is WISTER water safe to drink?
WISTER water receives a grade of B (69/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has WISTER detected?
1 contaminants were tested in WISTER's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does WISTER have any EPA violations?
Yes, WISTER has 27 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL. 1 are health-based violations.
How many people does WISTER serve?
WISTER serves approximately 1,002 people, Oklahoma.
What type of water does WISTER provide?
WISTER sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OK3004014.
How does WISTER compare to other utilities in Oklahoma?
WISTER scores 69/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Oklahoma state page for a full comparison of water systems.