What's in NORTH MARIN WATER DISTRICT's water?
NORTH MARIN 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 61,691 people through 20,438 service connections.
How this compares nationally
Out of 12,903 systems in this dataset, NORTH MARIN WATER DISTRICT ranks 9,081th by violation burden (30th percentile) - 2 violations total, 1 health-based.
How NORTH MARIN WATER DISTRICT compares within CA
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - NORTH MARIN WATER DISTRICT's 1 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for NORTH MARIN WATER DISTRICT is from 1993-01-07 (health-based: 1993-01-07). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
NORTH MARIN 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)
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 this data is and is not
This is what NORTH MARIN WATER DISTRICT 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. This record - 1 health-based violation on file for NORTH MARIN WATER DISTRICT - 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.