WILLISTON CITY OF: EPA violation history, explained
WILLISTON CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 26,426 people through 6,876 service connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, WILLISTON CITY OF ranks 2,494th by violation burden (81th percentile) - 12 violations total, 8 health-baseds.
Against the ND average
Among the 52 ND systems in this dataset, the average is 2.1 health-based violations - WILLISTON CITY OF's 8 is above that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
WILLISTON CITY OF's most recent violation on record is dated 2014-01-11, with the most recent health-based one dated 2014-01-06. Last reported to EPA: 06/29/2026.
The concern categories on record
WILLISTON CITY OF's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Long Term 2 Enhanced Surface Water Treatment Rule; Surface Water Treatment Rule
- Disinfection byproducts - flagged from: TTHM
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What WILLISTON CITY OF's record does not cover
This is what WILLISTON CITY OF reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. This record - 8 health-based violations on file for WILLISTON CITY OF - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.