Is MID-PENINSULA WATER DISTRICT's water safe to drink?
MID-PENINSULA WATER DISTRICT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 30,609 people through 8,179 service connections.
How this compares nationally
MID-PENINSULA WATER DISTRICT has 3 violations on record in total, 3 of thems health-based - ranking it 5,609th of 12,903 systems by violation count, the 57th percentile nationally.
Against the CA average
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - MID-PENINSULA WATER DISTRICT's 3 is at or below that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
MID-PENINSULA WATER DISTRICT's most recent violation on record is dated 2015-01-03, with the most recent health-based one dated 2015-01-03. Last reported to EPA: 06/22/2026.
The concern categories on record
MID-PENINSULA WATER DISTRICT'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); Surface Water Treatment 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 MID-PENINSULA WATER DISTRICT's record does not cover
MID-PENINSULA WATER DISTRICT'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. 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.