NE SAMMAMISH SEWER & WATER DISTRICT
Washington — Community Water System — PWSID: WA5375265
System Information
| PWSID | WA5375265 |
| System Name | NE SAMMAMISH SEWER & WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Feb 7, 1981 |
| Last Reported | Dec 11, 2025 |
Location & Contact
| State | Washington |
| City | Sammamish |
| ZIP Code | 98074 |
| Address | 3600 Sahalee Way NE |
| Organization | NE SAMMAMISH SEWER & WATER DISTRICT |
| Phone | — |
Population & Service
| Population Served | 8,516 |
| Service Connections | 3,360 |
Drinking Water Violations (18)
This water system has 18 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2022 | Dec 31, 2022 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2022 | Nitrate Rule |
| Jan 1, 2009 | Mar 31, 2009 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2009 | Arsenic Rule |
| Jan 1, 2009 | Mar 31, 2009 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2009 | Arsenic Rule |
| Jan 1, 2009 | Mar 31, 2009 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2009 | Arsenic Rule |
| Jan 1, 2009 | Mar 31, 2009 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2009 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2008 | Mar 31, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Mar 31, 2008 | Arsenic Rule |
| Jan 1, 2003 | Dec 31, 2003 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2003 | Nitrate Rule |
| Jan 1, 2003 | Dec 31, 2003 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2003 | Nitrate Rule |
| Jan 1, 2003 | Dec 31, 2003 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2003 | Nitrate Rule |
| Jan 1, 1993 | Jan 1, 1994 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 1, 1994 | Lead and Copper Rule |
| Oct 1, 1979 | Oct 31, 1979 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Oct 31, 1979 | Radionuclides and Revised Rad Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.