NORTHSTAR CSD - MARTIS VALLEY: EPA violation history, explained

NORTHSTAR CSD - MARTIS VALLEY has no violations on record in EPA's SDWIS data. 4,493 people get their water from it, across 1,316 connections.

Ranked against every other system in this dataset

NORTHSTAR CSD - MARTIS VALLEY has 0 violations on record in total, 0 of thems health-based - ranking it 12,764th of 12,903 systems by violation count, the 1th percentile nationally.

Against the CA average

NORTHSTAR CSD - MARTIS VALLEY's 0 health-based violations sit within the CA average of 5.8, across 803 systems statewide. See the lead and copper guide for why lead counts differently.

Why "no violations" needs a caveat here

NORTHSTAR CSD - MARTIS VALLEY serves 4,493 people. EPA requires smaller systems to test less often than large ones, so a clean record here is real but weaker evidence than the same record on a system serving hundreds of thousands - fewer tests means fewer chances to catch a problem. See the guide to reading a clean record for what that does and does not tell you.

What NORTHSTAR CSD - MARTIS VALLEY's record does not cover

NORTHSTAR CSD - MARTIS VALLEY'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 - 0 health-based violations on file for NORTHSTAR CSD - MARTIS VALLEY - 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.