If the home you are buying gets its water from a private well, you are responsible for that water supply once you close—its quality, its quantity, and the equipment that delivers it. In rural and semi-rural parts of Pierce County, including areas around Graham, Orting, Buckley, Eatonville, and parts of Bonney Lake and the Key Peninsula, private wells are common. A well inspection and water test during your inspection period is how you find out what you are buying.
Who oversees private wells in Pierce County?
Individual private wells are the owner’s responsibility. The Tacoma-Pierce County Health Department provides guidance for well owners and recommends testing well water once a year for bacteria and every three years for nitrate. The Health Department also notes that unused wells must be decommissioned by a licensed well driller.
The Washington State Department of Ecology regulates well construction and keeps well reports, and it publishes guidance on testing drinking water. The Washington State Department of Health also has resources on testing your water.
What a well inspection should cover
Water quality
At minimum, most buyers test for coliform bacteria and nitrate. Depending on location and the inspector’s recommendation, you may also test for arsenic, iron, manganese, hardness, or other contaminants. Use a state-accredited laboratory, and follow the lab’s sampling instructions carefully.
Water quantity and flow
A flow or yield test helps confirm the well can deliver enough water for the household. Ask the inspector to explain how long the test runs and what the results mean for daily use.
Equipment
- Wellhead condition: a sealed, properly elevated cap and protection from surface water.
- Pump, pressure tank, pressure switch, and electrical connections.
- Any treatment equipment, such as filters or softeners, and its maintenance history.
Records
- The well report (well log) showing depth, construction, and date.
- Past water test results and repair invoices.
- For shared wells, a recorded well-sharing or maintenance agreement.
Buying a rural or acreage property?
The Barnard Group helps buyers plan well, septic, and property inspections so nothing is missed during the contingency period. Call or text 253-677-5765, or explore homes at BarnardGroupRE.com.
When to schedule it
Schedule the well inspection and water sampling as soon as you reach mutual acceptance. Lab results can take several days, and your inspection contingency window is limited. If your loan program requires water testing—some do, particularly government-backed loans—ask your lender early what they need and from which lab.
Most homes with private wells also have septic systems, which need their own inspection. See How to Sell a Home With a Septic System in Pierce County to understand how septic inspections work. If the home is on public sewer instead, read our guide to sewer scope inspections.
Shared wells
Some Pierce County properties share a well with neighbors. A shared well can work well, but it adds questions:
- Is there a recorded agreement covering access, maintenance costs, and repairs?
- How is the electricity for the pump paid?
- Who handles testing, and are records available?
- Is the system classified as a small public water system with additional requirements?
Your title report and the seller’s disclosure should answer some of these; your broker and an attorney can help with the rest.
What the seller’s disclosure tells you
Washington’s seller disclosure statement (Form 17) includes a water section covering the water source and well details known to the seller. Read it before you finalize your inspection plan. Learn more in What Is Form 17?
If the results come back with issues
- Bacteria: often addressed by disinfection and retesting, but the cause should be identified.
- Nitrate or other contaminants: may require treatment equipment. Get a quote from a water treatment professional.
- Low yield or failing equipment: get a well contractor’s assessment and cost estimate.
With specific findings and estimates in hand, you can request repairs, a credit, or a price adjustment, or use your contingency rights—depending on your contract.
Frequently asked questions
Is a well inspection part of a standard home inspection?
Usually not fully. Many home inspectors look at visible equipment, but water sampling and flow testing are often separate services. Confirm what is included when you book.
How often should I test after I buy?
The Tacoma-Pierce County Health Department recommends testing for bacteria every year and nitrate every three years.
Buy with confidence
Rural and acreage homes offer space and privacy, and they come with a few more systems to understand. Call or text The Barnard Group at 253-677-5765 to plan your inspections. If you are selling a home with a well, book a Home Selling Strategy Session to prepare your records before you list.
