What's in NORTHSTAR C.S.D.'s water?
NORTHSTAR C.S.D. has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 15,452 people through 955 service connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, NORTHSTAR C.S.D. ranks 5,583th by violation burden (57th percentile) - 4 violations total, 3 health-baseds.
How NORTHSTAR C.S.D. compares within CA
CA's 803 covered systems average 5.8 health-based violations each; NORTHSTAR C.S.D. carries 3, not more than typical for the state. 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 NORTHSTAR C.S.D. is from 2006-01-05 (health-based: 2006-01-05). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
NORTHSTAR C.S.D.'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: 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 this data is and is not
Everything on this page is NORTHSTAR C.S.D.'s own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and NORTHSTAR C.S.D.'s customers' taps is household plumbing, invisible to a system-level record ranked 5,583th of 12,903 by violation count. The guide to what this data misses covers that gap.