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Public water system record

Lynden Water Department

Serves Lynden, Whatcom County, WA · 17,969 people served

Federal records show 1 health-based violation and 1 monitoring/reporting issue for Lynden Water Department in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.

  • WA5349150
  • LYNDEN
  • WA
  • 17,969 served

System profile

Source water Surface water
ZIP 98264
EPA system ID WA5349150

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
1

Key facts

  • Lynden Water Department draws water from 1 well and 1 surface water intake (1 of them for emergency, seasonal or other part-time use).
  • Record on file since 1979, with 17 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 5,901 service lines.

Check whether Lynden Water Department serves your address

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Dec 1, 2023 Resolved Yes

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Surface Water Treatment Rule
Monitoring and reporting
 Jul 1, 2025 Resolved

Full record since 1979

EPA's records for Lynden Water Department go back to 1979. Before October 19, 2016 they list 17 health-based violations (17 archived by EPA without a recorded fix) and 11 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 9
1990s 1 2
2000s 16 0
2020s 1 1

Most recent health-based violation before October 19, 2016: Nitrate (acute), began October 2009, Archived.

Show all 17 health-based violations before October 19, 2016
Contaminant Start date Status
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Oct 1, 2009 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Oct 1, 2009 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Jul 1, 2009 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Apr 1, 2009 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
 Jan 1, 2009 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Oct 1, 2008 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
 Jul 1, 2008 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
 Jan 1, 2008 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
 Oct 1, 2007 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Jul 1, 2007 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 13.3 mg/L, federal limit 10 mg/L (1.3 times the limit)
 Apr 1, 2007 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 13.3 mg/L, federal limit 10 mg/L (1.3 times the limit)
 Oct 1, 2006 Archived
Surface Water Treatment Rule
Treatment technique failure
 Aug 1, 2006 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 11.6 mg/L, federal limit 10 mg/L (1.2 times the limit)
 Jan 1, 2006 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 14.3 mg/L, federal limit 10 mg/L (1.4 times the limit)
 Apr 1, 2005 Archived
Nitrate (acute)
Contaminant limit exceeded
Measured 16.2 mg/L, federal limit 10 mg/L (1.6 times the limit)
 Jan 1, 2005 Archived
Surface Water Treatment Rule
Treatment technique failure
 Sep 1, 1997 Archived

What the violations mean

Interim Enhanced Surface Water Treatment Rule

1 incident

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Where the water comes from

Lynden Water Department draws water from 1 well and 1 surface water intake (1 of them for emergency, seasonal or other part-time use). 2 other community water systems buy water from Lynden Water Department.

Community systems that buy water from it

Annual water quality report

Lynden Water Department must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Washington.

Certified drinking water labs by state EPA guidance for private wells