What's in BLACK DIAMOND WATER DEPT's water?
BLACK DIAMOND WATER DEPT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 6,407, over 2,368 connections.
BLACK DIAMOND WATER DEPT's record against the rest of the country
Out of 12,903 systems in this dataset, BLACK DIAMOND WATER DEPT ranks 2,914th by violation burden (77th percentile) - 165 violations total, 6 health-baseds.
How BLACK DIAMOND WATER DEPT compares within WA
Among the 322 WA systems in this dataset, the average is 3.7 health-based violations - BLACK DIAMOND WATER DEPT's 6 is above 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 BLACK DIAMOND WATER DEPT is from 2017-01-07 (health-based: 1995-01-06). Last reported to EPA: 06/19/2026.
What kind of problem, specifically
BLACK DIAMOND WATER DEPT'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
BLACK DIAMOND WATER DEPT'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. Between the utility's meter and BLACK DIAMOND WATER DEPT's customers' taps is household plumbing, invisible to a system-level record ranked 2,914th of 12,903 by violation count. The guide to what this data misses covers that gap.