What's in MCI SHIRLEY's water?
MCI SHIRLEY has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 3,500 people through 3 service connections.
MCI SHIRLEY's record against the rest of the country
MCI SHIRLEY has 100 violations on record in total, 8 of thems health-based - ranking it 2,312th of 12,903 systems by violation count, the 82th percentile nationally.
How MCI SHIRLEY compares within MA
MA's 283 covered systems average 7.0 health-based violations each; MCI SHIRLEY carries 8, 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 MCI SHIRLEY is from 2008-01-04 (health-based: 2007-01-12). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
MCI SHIRLEY'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:
- Lead & copper - flagged from: Lead and Copper Rule
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
- Other regulated metals - flagged from: Arsenic
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
This is what MCI SHIRLEY 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. Between the utility's meter and MCI SHIRLEY's customers' taps is household plumbing, invisible to a system-level record ranked 2,312th of 12,903 by violation count. The guide to what this data misses covers that gap.