Is POTOSI PWS's water safe to drink?
POTOSI 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 2,527 people through 1,236 service connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, POTOSI PWS ranks 123th by violation burden (99th percentile) - 93 violations total, 79 health-baseds.
Against the MO average
Among the 327 MO systems in this dataset, the average is 6.1 health-based violations - POTOSI PWS's 79 is above that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
POTOSI PWS's most recent violation on record is dated 2026-03-04, with the most recent health-based one dated 2015-01-12. Last reported to EPA: 06/16/2026.
The concern categories on record
POTOSI 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)
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
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 POTOSI PWS's record does not cover
POTOSI PWS'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 - 79 health-based violations on file for POTOSI PWS - 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.