Finding septic records in Whatcom County, Washington
How to search Whatcom County's online septic records by property ID or parcel number, what the files hold, what to do when a record isn't online, and the inspection report a sale needs.
On this page: 4 sections
Whatcom County Health and Community Services keeps the septic records for properties in the county, and most of them are online.1
What's in the online files
How to search
- Find your property ID or parcel number. On the Whatcom County Assessor's Real Property Search, choose "Property Address" as the search type, type the street address and search. The results show both the property ID and the GeoID, or parcel number.
- Search the records. Enter either number in the county's online septic records search.1
If the record isn't online
The search tool tells you when there's nothing online. The office may still have records for the property: call Health and Community Services at 360-778-6000, or email environmentalhealth@co.whatcom.wa.us, and staff can check its files and send you what it has.1 Records requests of other kinds go through the county's public records request page.
Inspection reports, and selling a home
The ROSS reports in the files come from the evaluations the county requires:2
- a conventional gravity system every 3 years;
- every other type of system once a year, unless its manufacturer says more often;
- any system serving a food service business once a year.
When a property is offered for sale, a current ROSS has to be on file with Health and Community Services. A homeowner can take the county's free training and evaluate their own system in some cases, but not for a sale or property transfer. Those evaluations are done by a professional licensed by the county as an Operations and Maintenance Specialist.2
If you're not sure what kind of system you have, the county's number is 360-778-6000.2
Whatcom County Health and Community Services, checked October 2026.
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