HILLSBORO PWS: EPA violation history, explained
HILLSBORO PWS had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 3,000, over 1,310 connections.
HILLSBORO PWS's record against the rest of the country
HILLSBORO PWS has 20 violations on record in total, 13 of thems health-based - ranking it 1,501th of 12,903 systems by violation count, the 88th percentile nationally.
Against the MO average
Among the 327 MO systems in this dataset, the average is 6.1 health-based violations - HILLSBORO PWS's 13 is above that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
HILLSBORO PWS's most recent violation on record is dated 2027-06-06, with the most recent health-based one dated 2027-06-06. Last reported to EPA: 06/16/2026.
The concern categories on record
HILLSBORO 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); Revised Total Coliform Rule
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 HILLSBORO PWS's record does not cover
Everything on this page is HILLSBORO 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 20 logged violations can see. The guide to what this data misses covers that gap.