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PUBLIC WATER SYSTEM REPORT
Is ONTARIO MUNICIPAL UTILITIES COMPANY Water Safe to Drink in 2026?
California · PWSID CA3610034 · Surface water
Population served
185,010
Cities served
ONTARIO
State / jurisdiction
California (CA)
PWSID
CA3610034
F
TAP WATER GRADE
High Risk
Model score 43/88 from violations, PFAS profile, and monitoring signals — not a laboratory test of your faucet.
9 violation record(s) in the latest EPA SDWA quarterly snapshotPFAS above EPA MCL (UCMR5 regulated compounds)
CONTAMINANTS — EPA UCMR5 MONITORING
Compound
Level (ppt)
EPA limit
Health guideline
Status
PFOAregulated
30.0
4 ppt
Exceeds
Above health advisory
PFHxA
7.1
—
Within / n/a
Unregulated (monitored)
PFPeA
6.7
—
Within / n/a
Unregulated (monitored)
PFBA
6.4
—
Within / n/a
Unregulated (monitored)
PFOSregulated
5.2
4 ppt
Exceeds
Above health advisory
PFHxSregulated
4.2
10 ppt
Within / n/a
MCL exceedance
Source: EPA UCMR5 · ppt = parts per trillion · MCL = enforceable limit for regulated PFAS
Official Consumer Confidence Report (CCR)
📋 The official 2026 CCR for ONTARIO MUNICIPAL UTILITIES COMPANY has not yet been published on WaterCheckup.
Are you the water operator for ONTARIO MUNICIPAL UTILITIES COMPANY? Publish your official CCR here for free — your customers are already finding this page.
Residents: Your public water system is required by EPA to publish an annual CCR by July 1st each year. Contact ONTARIO MUNICIPAL UTILITIES COMPANYdirectly to request a copy, or check the EPA's national CCR portal at cfpub.epa.gov/ccr.
VIOLATIONS HISTORY (FEDERAL SNAPSHOT)
EPA’s national SDWA quarterly files associate 9 violation-related records with this system in the same reporting quarter as the public water system snapshot used on WaterCheckup. This is not a complete historical docket — see ECHO and SDWIS for full compliance context.
Based on ONTARIO MUNICIPAL UTILITIES COMPANY's monitoring and violation profile, here are vetted filtration options — same picks framework as our city reports.
Certified Filter Recommendations
Matched to what's actually in your water
TOP PICKS FOR ONTARIO MUNICIPAL UTILITIES COMPANY
⚠ EPA violations / contaminants in monitoring data
WHY THIS FOR ONTARIO MUNICIPAL UTILITIES COMPANY · Chosen for ONTARIO MUNICIPAL UTILITIES COMPANY because PFAS was detected at 30 ppt in UCMR5 — above the 4 ppt limit for some regulated compounds — and this system shows 9 violation record(s) in the latest federal snapshot. RO removes 99%+ of PFAS at the tap.
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