Is YNP-OLD FAITHFUL's water safe to drink?
YNP-OLD FAITHFUL had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 7,675 people get their water from it, across 153 connections.
How this compares nationally
Out of 12,903 systems in this dataset, YNP-OLD FAITHFUL ranks 1,620th by violation burden (87th percentile) - 23 violations total, 12 health-baseds.
Against the WY average
WY's 44 covered systems average 5.0 health-based violations each; YNP-OLD FAITHFUL carries 12, more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
YNP-OLD FAITHFUL's most recent violation on record is dated 2025-06-12, with the most recent health-based one dated 2025-06-11. Last reported to EPA: 06/29/2026.
The concern categories on record
YNP-OLD FAITHFUL'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:
- Lead & copper - flagged from: Lead and Copper Rule
- Microbial contamination / treatment technique - flagged from: Interim Enhanced Surface Water Treatment Rule; Long Term 2 Enhanced Surface Water Treatment Rule; Surface Water Treatment Rule
- Other regulated metals - flagged from: Arsenic
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What YNP-OLD FAITHFUL's record does not cover
Everything on this page is YNP-OLD FAITHFUL's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 12 health-based violations on file for YNP-OLD FAITHFUL - 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.