Is HOLLIS's water safe to drink?
HOLLIS 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 2,264 people through 957 service connections.
How this compares nationally
Out of 12,903 systems in this dataset, HOLLIS ranks 68th by violation burden (99th percentile) - 117 violations total, 107 health-baseds.
Against the OK average
OK's 240 covered systems average 39.5 health-based violations each; HOLLIS carries 107, more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
HOLLIS's most recent violation on record is dated 2024-01-10, with the most recent health-based one dated 2024-01-07. Last reported to EPA: 05/13/2026.
The concern categories on record
HOLLIS'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)
- Nitrate / nitrite - flagged from: Nitrate; Nitrate-Nitrite
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 HOLLIS's record does not cover
HOLLIS's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 117 logged violations can see. The guide to what this data misses covers that gap.