Before You Drill or Buy:
Understanding Water Rights, the Hirst Decision, and the Nooksack Adjudication in Whatcom County
Finding the perfect slice of land in Whatcom County is a dream for many. Whether you picture a home tucked away in the trees of Deming, a hobby farm in Lynden, or a modern build near Ferndale, there is one critical factor that can make or break your plans: water.
In the Pacific Northwest, water is a highly regulated public resource. If you are planning to buy land, drill a private well, or already own a rural home, you must navigate a complex local water landscape.
This guide breaks down the two most critical water issues in our region: the historical Hirst Decision for new construction, and the massive, ongoing Nooksack Basin Water Adjudication affecting current homeowners.
Part 1: The Past — Drilling a New Well & the "Hirst Decision"
If you are looking at vacant land and planning to build, you cannot simply drill a well and pull water without restrictions.
In 2016, a landmark Washington State Supreme Court case known as the Hirst Decision (Whatcom County v. Hirst) ruled that counties must prove water is both physically and legally available before issuing a building permit. A new well cannot pull water away from "senior" water rights holders (such as local tribes or agricultural operations) or protected streams (like the Nooksack River).
How We Build Today: The "Hirst Fix"
To keep rural development from grinding to a halt, the Washington State Legislature passed Senate Bill ESSB 6091 (commonly known as the "Hirst Fix") on January 18, 2018. This law established the current rules for drilling a new permit-exempt well in the Nooksack Basin (Water Resource Inventory Area 1, or WRIA 1):
The Limit: Your indoor/outdoor water usage is legally capped at a maximum daily average of 3,000 gallons per day (GPD).
The Fee: You must pay a one-time $500 fee to Whatcom County when applying for your building permit.
The Deed: These limits and water rules are permanently recorded on your property's deed.
Part 2: The Present — The Nooksack Water Adjudication (The "Water Audit")
While the Hirst Decision governs new wells, the Nooksack Basin (WRIA 1) Water Rights Adjudication is currently auditing existing water use.
Launched by the Washington State Department of Ecology, this is a massive legal proceeding in Whatcom County Superior Court. It is essentially a comprehensive "water audit" to catalog every single water user in our region.
The Critical Details You Need to Know:
Who is affected? Anyone in WRIA 1 (which covers nearly all of Whatcom County and over 600 properties in northern Skagit County) who gets water from a private well, a shared well, or a surface water source like a stream or lake. Note: If you get 100% of your water from a city utility (like the City of Bellingham), you do not need to participate.
The Legal Summons: Tens of thousands of local property owners have been served official court summonses via certified mail or legal notices published in local newspapers.
The Extended Deadline: To reduce widespread confusion and give residents adequate time to find technical help, the Whatcom County Superior Court officially extended the filing deadline. All impacted water users now have until June 1, 2027, to file their official court claim forms.
The Risk of Ignoring It: If you ignore the summons and fail to file your claim by the deadline, you risk permanently forfeiting your legal right to use your water, which would instantly destroy your property's value.
Your Step-by-Step Action Plan
Whether you are preparing to build, researching a home to buy, or completing your adjudication claim, use this checklist:
1. Research the Property's Water History
If you are buying an existing home with a well, find the original well log to prove when it was drilled, how deep it is, and its historical flow rates. Use the state's official tracking map:
2. Check Whatcom County Building Guidelines
If you are preparing to apply for a building permit, make sure you meet the county's specific water safety and site inspection requirements before drilling:
Resource: Whatcom County Drinking Water Services
Resource: Whatcom County Health Guidelines for Permits (PDF)
3. File Your Adjudication Claim Early
Do not wait until the June 2027 deadline. The state provides free online "Guide and File" tools, and Whatcom County regularly hosts hands-on help clinics:
Resource: Ecology’s Nooksack Adjudication Portal (Use this to file your claim online).
Resource: Whatcom County Adjudication Assistance (Access water use calculators and local clinic schedules).
Resource: Adjudication Interactive Web Map (Enter your parcel number to see mapped water rights associated with your land).
*A quick note about Skagit county belongs here:
What if you are looking at land in Skagit County? It depends on which watershed the property sits in.
If the property is in the Nooksack Basin (WRIA 1)—which extends into northern Skagit County—it follows the Nooksack rules (3,000 GPD limit and a $500 fee) and is subject to the Nooksack Adjudication.
If the property is in the Skagit River Basin (WRIAs 3 & 4), the Hirst Fix does not apply due to a separate 2013 Supreme Court ruling (Swinomish Indian Tribal Community v. Ecology). In these areas, drilling a new private well is highly restricted and often requires purchasing expensive, private "water mitigation" packages.
Look for my upcoming blog post about Skagit River Basin water rights, with an even more sordid, dramatic recent legal history…watch this space!
The Bottom Line
Buying, building, or owning rural property in the Pacific Northwest is one of the most rewarding ways to live—but water is the lifeblood of your real estate investment. Navigating these rules incorrectly can lead to incredibly costly mistakes.
Whether you are looking to purchase acreage, prepare a home with a private well for the market, or simply need an expert to help you make sense of your court summons, I am here to guide you.
Let’s connect today to ensure your Whatcom County real estate investments are secure, compliant, and fully protected.
