Is RINCON DEL DIABLO MWD (ID-1)'s water safe to drink?
RINCON DEL DIABLO MWD (ID-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 30,757 people through 7,430 service connections.
Ranked against every other system in this dataset
4 total violations and 2 health-based ones put RINCON DEL DIABLO MWD (ID-1) at the 46th percentile nationally for violation burden, rank 6,923 of 12,903.
How RINCON DEL DIABLO MWD (ID-1) compares within CA
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - RINCON DEL DIABLO MWD (ID-1)'s 2 is at or below 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 RINCON DEL DIABLO MWD (ID-1) is from 2014-01-08 (health-based: 2014-01-08). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
RINCON DEL DIABLO MWD (ID-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
This is what RINCON DEL DIABLO MWD (ID-1) 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 4 logged violations can see. The guide to what this data misses covers that gap.