MUSCOY MWC NO. 1: EPA violation history, explained
MUSCOY MWC NO. 1 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 13,000 people through 1,459 service connections.
MUSCOY MWC NO. 1's record against the rest of the country
Out of 12,903 systems in this dataset, MUSCOY MWC NO. 1 ranks 5,005th by violation burden (61th percentile) - 22 violations total, 3 health-baseds.
How MUSCOY MWC NO. 1 compares within CA
CA's 803 covered systems average 5.8 health-based violations each; MUSCOY MWC NO. 1 carries 3, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for MUSCOY MWC NO. 1 is from 2024-01-04 (health-based: 2009-01-11). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
MUSCOY MWC NO. 1'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
Everything on this page is MUSCOY MWC NO. 1'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 MUSCOY MWC NO. 1's customers' taps is household plumbing, invisible to a system-level record ranked 5,005th of 12,903 by violation count. The guide to what this data misses covers that gap.