LYNDEN WATER DEPARTMENT
Washington — Community Water System — PWSID: WA5349150
System Information
| PWSID | WA5349150 |
| System Name | LYNDEN WATER DEPARTMENT |
| System Type | Community Water System |
| Water Source | Surface 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 | Lynden |
| ZIP Code | 98264 |
| Address | 300 4th Street |
| Organization | LYNDEN WATER DEPARTMENT |
| Phone | — |
Population & Service
| Population Served | 17,969 |
| Service Connections | 7,785 |
Drinking Water Violations (29)
This water system has 29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2025 | Jul 31, 2025 | Surface Water Treatment Rule | MR | No | Yes | — | — | — | Resolved | Jul 31, 2025 | Surface Water Treatment Rule |
| Dec 1, 2023 | Dec 31, 2023 | Interim Enhanced Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Dec 31, 2023 | Interim and Long Term 1 Enhanced Surface Water Treatment Rule |
| Dec 1, 2023 | Dec 31, 2023 | Interim Enhanced Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Dec 31, 2023 | Interim and Long Term 1 Enhanced Surface Water Treatment Rule |
| Oct 1, 2009 | Dec 31, 2009 | Nitrate | MCL | Yes | No | 14 MG/L | 10 mg/L | — | Archived | Dec 31, 2009 | Nitrate Rule |
| Oct 1, 2009 | Dec 31, 2009 | Nitrate | MCL | Yes | No | 14 MG/L | 10 mg/L | — | Archived | Dec 31, 2009 | Nitrate Rule |
| Jul 1, 2009 | Sep 30, 2009 | Nitrate | MCL | Yes | No | 14 MG/L | 10 mg/L | — | Archived | Sep 30, 2009 | Nitrate Rule |
| Apr 1, 2009 | Jun 30, 2009 | Nitrate | MCL | Yes | No | 14 MG/L | 10 mg/L | — | Archived | Jun 30, 2009 | Nitrate Rule |
| Jan 1, 2009 | Mar 31, 2009 | Nitrate | MCL | Yes | No | 15 MG/L | 10 mg/L | — | Archived | Mar 31, 2009 | Nitrate Rule |
| Oct 1, 2008 | Dec 31, 2008 | Nitrate | MCL | Yes | No | 14 MG/L | 10 mg/L | — | Archived | Dec 31, 2008 | Nitrate Rule |
| Jul 1, 2008 | Sep 30, 2008 | Nitrate | MCL | Yes | No | 12 MG/L | 10 mg/L | — | Archived | Sep 30, 2008 | Nitrate Rule |
| Jan 1, 2008 | Mar 31, 2008 | Nitrate | MCL | Yes | No | 11 MG/L | 10 mg/L | — | Archived | Mar 31, 2008 | Nitrate Rule |
| Oct 1, 2007 | Dec 31, 2007 | Nitrate | MCL | Yes | No | 12 MG/L | 10 mg/L | — | Archived | Dec 31, 2007 | Nitrate Rule |
| Jul 1, 2007 | Sep 30, 2007 | Nitrate | MCL | Yes | No | 14 MG/L | 10 mg/L | — | Archived | Sep 30, 2007 | Nitrate Rule |
| Apr 1, 2007 | Jun 30, 2007 | Nitrate | MCL | Yes | No | 13.3 MG/L | 10 mg/L | — | Archived | Jun 30, 2007 | Nitrate Rule |
| Oct 1, 2006 | Dec 31, 2006 | Nitrate | MCL | Yes | No | 13.3 MG/L | 10 mg/L | — | Archived | Dec 31, 2006 | Nitrate Rule |
| Aug 1, 2006 | Aug 31, 2006 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Archived | Aug 31, 2006 | Surface Water Treatment Rule |
| Jan 1, 2006 | Mar 31, 2006 | Nitrate | MCL | Yes | No | 11.6 MG/L | 10 mg/L | — | Archived | Mar 31, 2006 | Nitrate Rule |
| Apr 1, 2005 | Jun 30, 2005 | Nitrate | MCL | Yes | No | 14.3 MG/L | 10 mg/L | — | Archived | Jun 30, 2005 | Nitrate Rule |
| Jan 1, 2005 | Mar 31, 2005 | Nitrate | MCL | Yes | No | 16.2 MG/L | 10 mg/L | — | Archived | Mar 31, 2005 | Nitrate Rule |
| Jan 1, 1992 | Jan 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jan 31, 1992 | Total Coliform Rule |
| Oct 1, 1979 | Oct 31, 1979 | Arsenic | MR | No | No | — | 0.010 mg/L | — | Archived | Oct 31, 1979 | Arsenic Rule |
| Oct 1, 1979 | Oct 31, 1979 | Mercury | MR | No | No | — | 0.002 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| 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 |
| Oct 1, 1979 | Oct 31, 1979 | Fluoride | MR | No | No | — | 4.0 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Barium | MR | No | No | — | 2 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Nitrate | MR | No | No | — | 10 mg/L | — | Archived | Oct 31, 1979 | Nitrate Rule |
| Oct 1, 1979 | Oct 31, 1979 | Cadmium | MR | No | No | — | 0.005 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Chromium | MR | No | No | — | 0.1 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
| Oct 1, 1979 | Oct 31, 1979 | Selenium | MR | No | No | — | 0.05 mg/L | — | Archived | Oct 31, 1979 | Inorganic Chemicals |
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.