BEAVERTON, OR · Washington County
TUALATIN VALLEY WATER DISTRICT Water System
Consumer Confidence Report status
TUALATIN VALLEY WATER DISTRICT 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 no open violations for TUALATIN VALLEY WATER DISTRICT.
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 Oregon’s official records. Always confirm current status with Oregon before making decisions based on this information.
System facts
- System ID (PWSID)
- OR4100665
- System type
- Community Water System
- Population served
- 224,600
- Service connections
- 62,160
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
TUALATIN VALLEY WATER DISTRICT is the second largest community water system in Oregon, serving 224,600 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 2001 and 2025, all of which EPA lists as closed.
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 inorganic chemicals and the Total Coliform Rules.
Violation history
Monitoring, Regular
—Nitrate
January 1, 2025 – December 31, 2025
ArchivedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
April 1, 2001 – April 30, 2001
Resolved
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Nitrate | — | Archived |
| April 1, 2001 – April 30, 2001 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- May 5, 2003State Public Notification received3 linked violations
Common questions
Is TUALATIN VALLEY WATER DISTRICT required to publish a Consumer Confidence Report?
- Yes. TUALATIN VALLEY WATER DISTRICT 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 TUALATIN VALLEY WATER DISTRICT’s next Consumer Confidence Report due?
- TUALATIN VALLEY WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does TUALATIN VALLEY WATER DISTRICT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for TUALATIN VALLEY WATER DISTRICT.
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
TUALATIN VALLEY WATER DISTRICT
971-277-8813
BEAVERTON, OR 97003