C57/100
WILLISTON CITY OF — Water Quality Report 2026
Serving 26,426 people · North Dakota
Water Source
Surface Water
County
—
System ID
ND5301012
Violations
11
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 WILLISTON CITY OF
Is WILLISTON CITY OF water safe to drink?
WILLISTON CITY OF water receives a grade of C (57/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 11 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WILLISTON CITY OF detected?
69 contaminants were tested in WILLISTON CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does WILLISTON CITY OF have any EPA violations?
Yes, WILLISTON CITY OF has 11 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, TT, MCL. 8 are health-based violations.
How many people does WILLISTON CITY OF serve?
WILLISTON CITY OF serves approximately 26,426 people, North Dakota. The system provides water to 1 community: Williston.
What type of water does WILLISTON CITY OF provide?
WILLISTON CITY OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is ND5301012.
How does WILLISTON CITY OF compare to other utilities in North Dakota?
WILLISTON CITY OF scores 57/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our North Dakota state page for a full comparison of water systems.