ONTARIO MUNICIPAL UTILITIES COMPANY
Drinking water quality, contact, and Consumer Confidence Report
Serving 1 city in CA · PWSID CA3610034
ONTARIO MUNICIPAL UTILITIES COMPANY serves 185,010 people. See EPA records and contact info below.
- People served
- 185,010
Data sources: EPA SDWIS, ONTARIO MUNICIPAL UTILITIES COMPANY's published Consumer Confidence Report, California Department of Environmental Protection.
This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.
Official ONTARIO MUNICIPAL UTILITIES COMPANY Resources
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Emergency Contact
Available 24/7 for emergencies
ONTARIO MUNICIPAL UTILITIES COMPANY Service Area
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This map shows the approximate service area for ONTARIO MUNICIPAL UTILITIES COMPANY. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
ONTARIO MUNICIPAL UTILITIES COMPANY Water Quality Grade
Some contaminants exceed health guidelines.
Grade is calculated based on contaminants exceeding health guidelines (MCLG) and EPA Maximum Contaminant Level violations. A = Excellent (90-100), B = Good (80-89), C = Fair (70-79), D = Poor (60-69), F = Failing (<60).
Is ONTARIO MUNICIPAL UTILITIES COMPANY Water Safe to Drink?
ONTARIO MUNICIPAL UTILITIES COMPANY has reported 3 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.
This utility serves 185,010 people across 1 city in CA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
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ONTARIO MUNICIPAL UTILITIES COMPANY Service Area
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ONTARIO MUNICIPAL UTILITIES COMPANY Contact & Information
Phone
Emergency Line
24/7 After-Hours
Mailing Address
B2B Contact Data
B2B Contact Data Available
Contacts for ONTARIO MUNICIPAL UTILITIES COMPANY
| Name | Title | Phone | |
|---|---|---|---|
| J████ S████ | Water Treatment Supervisor | (555) ███-████ | j████@city████.gov |
| M████ J██████ | Utility Director | (555) ███-████ | m████@water████.org |
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chloramines, hypochlorite
ONTARIO MUNICIPAL UTILITIES COMPANY Consumer Confidence Report
A Consumer Confidence Report (CCR) is the EPA-mandated annual water-quality report every community water system must publish by July 1 each year (Safe Drinking Water Act §1414(c)(4)). It summarizes contaminants tested, MCL and MCLG comparisons, and any system violations from the prior calendar year.
A current CCR for ONTARIO MUNICIPAL UTILITIES COMPANY has not been published or validated on TapWaterData yet.
Residents: contact the utility directly using the phone number above, or check the EPA’s national CCR portal. Reports are typically distributed by mail or posted on the utility’s official website.
ONTARIO MUNICIPAL UTILITIES COMPANY Annual Water Quality Reports
Historical reports are being compiled. Check back soon for archived water quality data.
What is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.
Recommended Water Filters for ONTARIO MUNICIPAL UTILITIES COMPANY
Based on water quality data from cities served by ONTARIO MUNICIPAL UTILITIES COMPANY, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Frequently Asked Questions about ONTARIO MUNICIPAL UTILITIES COMPANY
Is ONTARIO MUNICIPAL UTILITIES COMPANY water safe to drink?
Does ONTARIO MUNICIPAL UTILITIES COMPANY have PFAS in its water?
How do I pay my ONTARIO MUNICIPAL UTILITIES COMPANY water bill?
How many people does ONTARIO MUNICIPAL UTILITIES COMPANY serve?
What cities does ONTARIO MUNICIPAL UTILITIES COMPANY serve?
Does ONTARIO MUNICIPAL UTILITIES COMPANY have any EPA violations?
What is ONTARIO MUNICIPAL UTILITIES COMPANY's phone number?
Where can I find ONTARIO MUNICIPAL UTILITIES COMPANY's Consumer Confidence Report?
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How we built this page
Water-quality and contact data on this page comes from public federal and state records. We update each utility's record whenever its underlying source publishes new data — typically within days of an EPA SDWIS refresh.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: ONTARIO MUNICIPAL UTILITIES COMPANY's most recent published Consumer Confidence Report (CCR), where available.
- Service area & contact: EPA SDWIS plus the California Department of Environmental Protection / Drinking Water program.
Spotted a data issue? Use the Spotted something off? link at the bottom of the page — corrections feed back into the next data refresh. Learn more about TapWaterData.
Are you ONTARIO MUNICIPAL UTILITIES COMPANY? Publish your 2027 CCR
TapWaterData runs a free CCR publishing service for community water systems. Claim this listing to publish your Consumer Confidence Report here — it inherits this page's search authority and reaches every customer who Googles ONTARIO MUNICIPAL UTILITIES COMPANY.
- EPA-compliant distribution. Satisfies the 2027 Revised CCR Rule direct-URL requirement with an auditable archive.
- Publish once a year. Agent-assisted workflow; no login setup for small systems.
- Inherits this page's reach. Your published CCR appears directly on the page customers already find on Google.
Free for operators. No card required. Typical setup: 5 minutes.
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