What's in LIBBY CITY OF's water?
LIBBY CITY OF had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 4,892 people through 1,957 service connections.
LIBBY CITY OF's record against the rest of the country
Out of 12,903 systems in this dataset, LIBBY CITY OF ranks 926th by violation burden (93th percentile) - 104 violations total, 19 health-baseds.
Against the MT average
LIBBY CITY OF's 19 health-based violations sit above the MT average of 6.7, across 59 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
LIBBY CITY OF's most recent violation on record is dated 2025-01-12, with the most recent health-based one dated 2025-01-12. Last reported to EPA: 06/29/2026.
The concern categories on record
LIBBY 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: Interim Enhanced Surface Water Treatment Rule; Long Term 2 Enhanced Surface Water Treatment Rule; Surface Water Treatment Rule
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 LIBBY CITY OF's record does not cover
This is what LIBBY 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 - 19 health-based violations on file for LIBBY 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.