City of Ontario
Drinking water quality, contact, and Consumer Confidence Report
Serving 2 cities in OR, ID · PWSID OR4100587
City of Ontario serves 14,465 people. 1 contaminant currently exceed health-based guidelines — full breakdown below.
- People served
- 14,465
- Last EPA sample
- 2025-02-11
- PFAS
- Not detected
- Health-based violations since 2020
- 0
Data sources: EPA SDWIS, City of Ontario's published Consumer Confidence Report, and compliance monitoring reported to EPA by Oregon Drinking Water Services.
This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.
Official City of Ontario Resources
Emergency Contact
Help Paying Your City of Ontario Water Bill
- Ask City of Ontario about payment plans and assistance.
- Call 211 to reach local help with utility bills.Verified from 211.org
- Find your local Community Action Agency.Verified from communityactionpartnership.com
- The federal water-bill program (LIHWAP) ended in March 2024.Verified from acf.govVerified from csd.ca.gov
Water outage or no water?
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Oregon
City of Ontario Service Area
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This map shows the approximate service area for City of Ontario. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
City of Ontario Water Quality Grade
Not graded: Monitor
City of Ontario reads Monitor. A letter grade is given only beside a Safe verdict.
Is City of Ontario Water Safe to Drink?
City of Ontario has reported 1 contaminant 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 14,465 people across 2 cities in OR, ID. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
Get your water independently tested in Oregon →How does Oregon water quality rank nationally? →
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Oregon
Fluoride in City of Ontario Water
City of Ontario
PWSID OR4100587
City of Ontario reported 0.591 mg/L, below the 0.7 mg/L U.S. Public Health Service recommendation.
City of Ontario Service Area
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City of Ontario Contact & Information
B2B Contact Data
B2B Contact Data Available
Contacts for City of Ontario
| 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
hypochlorite
City of Ontario 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 City of Ontario 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.
City of Ontario Annual Water Quality Reports
We don’t have a link we can confirm belongs to this system, and we’d rather show none than the wrong utility’s. Oregon Drinking Water Services publishes drinking-water reports for systems in this state.
Visit Oregon Drinking Water ServicesWhat 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.
EPA Health-Based Violations Since 2020
City of Ontario has no health-based EPA violation since 2020 (EPA data as of Q2 2026).
EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Concerned about what's in your water?
You're viewing 1 contaminant above health-based guidelines here. Your own tap water can differ — upload your test (PDF or a photo) and we'll email a full plain-English reading of every number, free.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
Upload my testRecommended Water Filters for City of Ontario
Based on water quality data from cities served by City of Ontario, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Frequently Asked Questions about City of Ontario
Is City of Ontario water safe to drink?
Does City of Ontario have PFAS in its water?
How do I pay my City of Ontario water bill?
How many people does City of Ontario serve?
What cities does City of Ontario serve?
Does City of Ontario have any EPA violations?
What is City of Ontario's phone number?
Where can I find City of Ontario's Consumer Confidence Report?
Similar water utilities in Oregon
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: City of Ontario's most recent published Consumer Confidence Report (CCR), where available.
- Service area & contact: EPA SDWIS. The compliance records it holds for this system are reported to EPA by Oregon Drinking Water Services, the state's drinking-water primacy agency.
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 City of Ontario? 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 City of Ontario.
- 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.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach City of Ontario. For a problem with your water now (discolored water, no water, low pressure, a leak), contact City of Ontario directly.
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