Drinking Water Compliance OS

Sammamish, WA · King County

NE SAMMAMISH SEWER & WATER DISTRICT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)
WA5375265
System type
Community Water System
Population served
8,516
Service connections
3,360
Ownership
local government
Water source
groundwater (wells)

Violation history

  • Monitoring, Regular

    Nitrate

    January 1, 2022 – December 31, 2022

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 2009 – March 31, 2009

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 2008 – March 31, 2008

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2003 – December 31, 2003

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2003 – December 31, 2003

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2003 – December 31, 2003

    Resolved
  • Monitoring, 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)

Enforcement actions

Contact

NE SAMMAMISH SEWER & WATER DISTRICT

Phone not on record

Sammamish, WA 98074