OFALLON PWS: EPA violation history, explained
OFALLON PWS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 32,515 people through 13,527 service connections.
Ranked against every other system in this dataset
3 total violations and 1 health-based ones put OFALLON PWS at the 31th percentile nationally for violation burden, rank 8,955 of 12,903.
How OFALLON PWS compares within MO
MO's 327 covered systems average 6.1 health-based violations each; OFALLON PWS carries 1, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for OFALLON PWS is from 2025-01-06 (health-based: 1993-01-06). Last reported to EPA: 06/16/2026.
What kind of problem, specifically
OFALLON PWS'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
Everything on this page is OFALLON PWS's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 3 logged violations can see. The guide to what this data misses covers that gap.