Seattle, WA · King County
SEATTLE PUBLIC UTILITIES Water System
Consumer Confidence Report status
SEATTLE PUBLIC UTILITIES 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 SEATTLE PUBLIC UTILITIES.
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 Washington’s official records. Always confirm current status with Washington before making decisions based on this information.
System facts
- System ID (PWSID)
- WA5377050
- System type
- Community Water System
- Population served
- 1,161,961
- Service connections
- 195,204
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
SEATTLE PUBLIC UTILITIES is the largest community water system in Washington, serving 1,161,961 people from surface water.
As of August 1, 2026, its federal record holds 3 entries between 1979 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.
Of the 3, 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, the Lead and Copper Rule, and the Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Regular
—Nitrate
January 1, 2007 – December 31, 2007
ResolvedOCCT/SOWT Treatment Installation/Demonstration
Health-basedLead and Copper Rule
January 1, 1995 – February 1, 2001
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1979 – October 31, 1979
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2007 – December 31, 2007 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 1995 – February 1, 2001 | OCCT/SOWT Treatment Installation/Demonstration | Lead and Copper Rule | Health-based | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- January 26, 2016State Violation/Reminder Notice2 linked violations
- January 26, 2016State Compliance achieved1 linked violation
- June 12, 2008State Compliance achieved7 linked violations
- June 3, 2008State Compliance achieved15 linked violations
- June 3, 2008State Compliance achieved5 linked violations
- January 1, 2008State Compliance achieved3 linked violations
- January 1, 2008State Compliance achieved7 linked violations
- January 1, 2008State Compliance achieved4 linked violations
- May 15, 1997State Bilateral Compliance Agreement signed1 linked violation
Common questions
Is SEATTLE PUBLIC UTILITIES required to publish a Consumer Confidence Report?
- Yes. SEATTLE PUBLIC UTILITIES 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 SEATTLE PUBLIC UTILITIES’s next Consumer Confidence Report due?
- SEATTLE PUBLIC UTILITIES’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SEATTLE PUBLIC UTILITIES have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SEATTLE PUBLIC UTILITIES.
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
SEATTLE PUBLIC UTILITIES
Phone not on record
Seattle, WA 98134