Is RINCON DEL DIABLO MWD (ID-1) Water Safe to Drink in 2026?
California · PWSID CA3710018 · Surface water
Population served
30,757
Cities served
—
State / jurisdiction
California (CA)
PWSID
CA3710018
D
TAP WATER GRADE
Poor
Model score 45/88 from violations, PFAS profile, and monitoring signals — not a laboratory test of your faucet.
7 violation record(s) in the latest EPA SDWA quarterly snapshotPFAS compounds detected in UCMR5 monitoring
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CONTAMINANTS — EPA UCMR5 MONITORING
Compound
Level (ppt)
EPA limit
Health guideline
Status
PFBA
10.0
—
Within / n/a
Unregulated (monitored)
Source: EPA UCMR5 · ppt = parts per trillion · MCL = enforceable limit for regulated PFAS
VIOLATIONS HISTORY (FEDERAL SNAPSHOT)
EPA’s national SDWA quarterly files associate 7 violation-related records with this system in the same reporting quarter as the utility snapshot used on WaterCheckup. This is not a complete historical docket — see ECHO and SDWIS for full compliance context.
Based on RINCON DEL DIABLO MWD (ID-1)'s monitoring and violation profile, here are vetted filtration options — same picks framework as our city reports.
TOP PICKS FOR RINCON DEL DIABLO MWD (ID-1)
⚠ EPA violations / contaminants in monitoring data
WHY THIS FOR RINCON DEL DIABLO MWD (ID-1) · Chosen for RINCON DEL DIABLO MWD (ID-1) because PFAS compounds appear in UCMR5 monitoring for this PWS. Reverse osmosis is the most effective certified residential technology for PFAS.
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