OASIS MHP: EPA violation history, explained
OASIS MHP has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 3,000 people get their water from it, across 599 connections.
OASIS MHP's record against the rest of the country
Out of 12,903 systems in this dataset, OASIS MHP ranks 3,068th by violation burden (76th percentile) - 25 violations total, 6 health-baseds.
How OASIS MHP compares within IL
Among the 560 IL systems in this dataset, the average is 5.0 health-based violations - OASIS MHP's 6 is above that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for OASIS MHP is from 2021-01-09 (health-based: 1997-01-02). Last reported to EPA: 05/27/2026.
What kind of problem, specifically
OASIS MHP'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)
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
OASIS MHP'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. This record - 6 health-based violations on file for OASIS MHP - 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.