EL RENO, OK · Canadian County
CANADIAN CO RWD # 4 Water System
Consumer Confidence Report status
CANADIAN CO RWD # 4 must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show 1 item for CANADIAN CO RWD # 4 that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Oklahoma’s official records. Always confirm current status with Oklahoma before making decisions based on this information.
System facts
- System ID (PWSID)
- OK2000930
- System type
- Community Water System
- Population served
- 907
- Service connections
- 465
- Ownership
- local government
- Water source
- groundwater (wells)
CANADIAN CO RWD # 4 is one of 511 community water systems in Oklahoma in the 501 to 3,300 people size category, serving 907 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 2001 and 2024, of which 1 remains open; none are health-based.
All 2 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Groundwater Rule and the Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Source Water (GWR)
—E. COLI
March 29, 2024
UnaddressedMonitoring, Regular
—Combined Radium (-226 and -228)
April 1, 2001 – June 30, 2001
Resolved
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| March 29, 2024 | Monitoring, Source Water (GWR) | E. COLI | — | Unaddressed |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Resolved |
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
Enforcement actions
- May 15, 2024State Violation/Reminder Notice1 linked violation
- August 4, 2016State Compliance achieved6 linked violations
- August 4, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- February 20, 2015State Compliance achieved1 linked violation
- February 20, 2015State Compliance achieved1 linked violation
- September 28, 2004State Compliance achieved4 linked violations
- March 19, 2004State Public Notification received3 linked violations
- October 31, 2001State Administrative/Compliance Order with penalty issued3 linked violations
Common questions
Is CANADIAN CO RWD # 4 required to publish a Consumer Confidence Report?
- Yes. CANADIAN CO RWD # 4 is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is CANADIAN CO RWD # 4’s next Consumer Confidence Report due?
- CANADIAN CO RWD # 4’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CANADIAN CO RWD # 4 have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 1 item for CANADIAN CO RWD # 4 that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
CANADIAN CO RWD # 4
405-262-4203
EL RENO, OK 73036