HUMBOLDT C.S.D.: EPA violation history, explained
HUMBOLDT 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 19,807 people through 7,990 service connections.
HUMBOLDT C.S.D.'s record against the rest of the country
HUMBOLDT C.S.D. has 5 violations on record in total, 5 of thems health-based - ranking it 3,845th of 12,903 systems by violation count, the 70th percentile nationally.
How HUMBOLDT C.S.D. compares within CA
HUMBOLDT C.S.D.'s 5 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.
Most recent violation on record
The last violation EPA has on record for HUMBOLDT C.S.D. is from 1996-01-10 (health-based: 1996-01-10). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
HUMBOLDT 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: 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 this data is and is not
Everything on this page is HUMBOLDT 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 HUMBOLDT C.S.D.'s customers' taps is household plumbing, invisible to a system-level record ranked 3,845th of 12,903 by violation count. The guide to what this data misses covers that gap.