Is GRAND COUNTY WATER NO 1's water safe to drink?
GRAND COUNTY WATER NO 1 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 5,400 people through 702 service connections.
GRAND COUNTY WATER NO 1's record against the rest of the country
GRAND COUNTY WATER NO 1 has 237 violations on record in total, 5 of thems health-based - ranking it 3,323th of 12,903 systems by violation count, the 74th percentile nationally.
Against the CO average
GRAND COUNTY WATER NO 1's 5 health-based violations sit above the CO average of 3.0, across 230 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
GRAND COUNTY WATER NO 1's most recent violation on record is dated 2026-01-02, with the most recent health-based one dated 2024-01-04. Last reported to EPA: 06/17/2026.
The concern categories on record
GRAND COUNTY WATER NO 1'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: Groundwater Rule; Interim Enhanced 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 GRAND COUNTY WATER NO 1's record does not cover
Everything on this page is GRAND COUNTY WATER NO 1'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 GRAND COUNTY WATER NO 1's customers' taps is household plumbing, invisible to a system-level record ranked 3,323th of 12,903 by violation count. The guide to what this data misses covers that gap.