Is HELENA WATER SYSTEM's water safe to drink?
HELENA WATER SYSTEM had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 32,091, over 11,684 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, HELENA WATER SYSTEM ranks 4,143th by violation burden (68th percentile) - 25 violations total, 4 health-baseds.
How HELENA WATER SYSTEM compares within MT
Among the 59 MT systems in this dataset, the average is 6.7 health-based violations - HELENA WATER SYSTEM's 4 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for HELENA WATER SYSTEM is from 2023-01-01 (health-based: 2023-01-01). Last reported to EPA: 06/29/2026.
What kind of problem, specifically
HELENA WATER SYSTEM'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: Coliform (TCR)
- Disinfection byproducts - flagged from: Total Haloacetic Acids (HAA5)
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 this data is and is not
Everything on this page is HELENA WATER SYSTEM's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and HELENA WATER SYSTEM's customers' taps is household plumbing, invisible to a system-level record ranked 4,143th of 12,903 by violation count. The guide to what this data misses covers that gap.