Is TOWN OF HILLSBOROUGH's water safe to drink?
TOWN OF HILLSBOROUGH has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 11,766, over 4,303 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, TOWN OF HILLSBOROUGH ranks 8,980th by violation burden (30th percentile) - 3 violations total, 1 health-based.
Against the CA average
CA's 803 covered systems average 5.8 health-based violations each; TOWN OF HILLSBOROUGH 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
TOWN OF HILLSBOROUGH's most recent violation on record is dated 2014-01-05, with the most recent health-based one dated 2014-01-05. Last reported to EPA: 06/22/2026.
The concern categories on record
TOWN OF HILLSBOROUGH'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 TOWN OF HILLSBOROUGH's record does not cover
This is what TOWN OF HILLSBOROUGH reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific 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.