Wells, Septics and the Water Question: A Field Guide to Rural Plumbing in Jefferson County

There is a moment in almost every rural showing I do where the conversation finally turns to the part nobody really wanted to think about. The kitchen is charming, the view is striking, the porch is wide enough for two chairs and a dog. And then the buyer asks, sometimes shyly, sometimes with their arms crossed: so where does the water come from, and where does it go?

It's the right question. Out here, you cannot rely on a city pipe to deliver clean water and another one to whisk away whatever you produced with it. The well in your front yard produces the water and the septic tank fifty feet from your back door handles the waste. The rules that govern it all are real, specific, and worth understanding before you sign anything.

This is the field guide I wish every buyer had a week before they wrote their first offer on a rural property in this corridor. We will walk through wells, septics, rainwater catchment, and composting toilets, in that order, with the relevant Jefferson County and Washington State code at each stop. Not because I want to turn anyone into a code lawyer, but because the difference between a property that works and a property that always needs another repair is commonly somewhere inside those pages.

Wells

A private well, in this state, is regulated on two layers. Washington State Department of Ecology controls the construction itself under chapter 173-160 WAC and RCW 18.104, which together cover who can drill, how the casing has to be set, how the surface seal has to be poured, and what the driller has to report back to the state once the hole is done. Jefferson County Public Health controls everything else, which is most of what actually matters to you as a buyer.

A few things to know.

Every new well needs a permit before drilling starts. The driller submits a Notice of Intent to Ecology, and Jefferson County inspects a percentage of all new wells in the county for surface seal and casing integrity. The driller has thirty days after completion to file a Water Well Report with Ecology, which becomes the well log you can look up later. If you are buying a property with an existing well, ask for the well log. If the seller cannot find it, you can sometimes pull it from Ecology's well report viewer, but it isn't always easy. Often the well is drilled before the property had received an address, or it was dug in the years before regular permitting. Sometimes you can search by the owner's last name, but often it will be recorded in the name of the owner before them. 

A well has to actually produce enough water to support a household. Jefferson County's threshold for proving adequate potable supply on a building permit is at least 400 gallons per day of sustained yield, demonstrated through a stabilization pump test by a qualified individual. If a well produces less than that, the property still may be buildable, but a notice gets recorded to the title flagging the limitation. That notice does not go away when ownership changes. It travels with the parcel.

Water quality testing for a building permit needs to be current. Jefferson County requires bacteria, nitrate, and chloride tests from within the last 36 months for new construction. Some lenders will require testing of the well too, but I recommend a well test for your own sake. Sample bottles can be picked up at the Jefferson County Environmental Health office on Sheridan Street or at the Jefferson County PUD in Port Hadlock. Alternatively you can hire a professional company to come sample the water. A proper well inspection can include flow and drawdown, as well as all the contaminant testing that is common for the area. 

It is appropriate at this point to note that along the Hood Canal, mostly in isolated pockets, you can absolutely encounter saltwater intrusion. A well with chlorides above certain thresholds can complicate or block new construction. Jefferson County operates a tiered Seawater Intrusion Protection Zone system; the regulatory path varies by chloride concentration and proximity to the marine shoreline. Reverse osmosis can make brackish water drinkable, and can range in price from several hundred dollars for a point-of-use system to tens of thousands for whole-house treatment. The permits are another conversation. An RO system does not substitute for the county's hydrogeologic and monitoring requirements. 

It can be difficult to find information about water quality testing at any scale, because it is not reported to any agency that publishes their findings publicly. That is one of the many reasons that working with an agent with experience in the area where you are buying is, in my opinion, absolutely crucial. 

The exempt-well rules limit how much you can use. Washington allows a permit-exempt well for a single-family residence to draw up to 5,000 gallons per day for indoor use and limited outdoor irrigation under RCW 90.44. If you plan to irrigate more than half an acre or draw more than 5,000 gallons per day, you need an actual water right, and new water rights in much of western Washington are difficult to obtain. For most rural homes in this corridor that is plenty, but it is worth knowing if you have horse paddocks, a market garden, or any agricultural ambition. Check the title for water rights, as they often do exist on historical farms, but can be hard to acquire otherwise.

Generally, well testing is performed at the buyer’s expense. I always recommend a well inspection contingency and testing for the contaminants that are typical for the area. It shouldn't cost more than $500 - $600, and could save you significantly more. I often tell buyers to use their feasibility or inspection periods to seek out the deal breakers. Poor flow or quality of water can certainly be one of them.

Septics

A failed septic system can be another deal breaker.

The state floor is chapter WAC 246-272A, the on-site sewage system rule maintained by Washington State Department of Health. Above that, Jefferson County overlays its own local rule under Chapter 8.15 of the Jefferson County Code, administered by Jefferson County Public Health. Below both of those, you have site-specific reality: the soil, the slope, the setbacks to wells and creeks, and the design that the original installer signed his name to thirty years ago.

A few things to know.

Every on-site sewage system in Jefferson County has to be professionally inspected on a frequency tied to its type. Conventional gravity systems get inspected less often than alternative systems with pumps, sand filters, or proprietary treatment. The county publishes the frequency table on the Public Health website, and it ranges roughly from every three years on the simplest systems to annually on the most complex.

A professional inspection is required at the time of sale. If the sellers don't do it, the new buyers will receive a letter from the county requiring that it be inspected immediately. Under JCC 8.15 and the county's Sewage Management Plan adopted in 2007, an inspection by a certified O&M Specialist or Licensed Designer must be on file when a property changes hands. The same applies when a buyer applies for a building permit, a land division, a conditional use permit, or a boundary line adjustment. If a property does not have a current inspection on file, getting one is mandatory and is traditionally paid for by the seller. If a property has a septic system, and you don't have immediate access to a current septic inspection report, use a form 22s septic addendum and get answers. 

Setback distances are not negotiable. Under WAC 246-272A-0210 Table IV, an on-site sewage system has to sit at least:

100 feet from a well

100 feet from a stream, lake, or other surface water at ordinary high water

5 feet from a property line

10 feet from a pressurized water supply line

200 feet from a public drinking water spring

Those numbers matter most on smaller acreage. There are neighborhoods throughout the corridor where it is common knowledge that a parcel is not developable unless you own two of them side by side. That can sometimes be the only way to guarantee the construction of both a well and septic system.

Have your inspector pull the as-built drawing from Jefferson County Public Health, walk the tank lids, lift them if access allows, and pump the tank if it has not been pumped recently. A septic inspection that does not include a pump is a visual report, not an inspection.

Locate a copy of the as-built so you don't end up planning a circular driveway or gardens on top of the drain field. I know that you are sick of reading through permits and contracts but please, carefully read through the septic report. If there are deficiencies, make sure you can handle them, or have the seller make repairs. Commonly on older septic systems the lids will be buried and risers will need to be installed. Be aware that a septic pumping report is NOT an inspection. A tank can be pumped without ever checking for cracked cement or a broken d-box. Many say that pumping should only be performed if necessary to maintain a healthy septic ecosystem. Pumping is not required for most transactions unless indicated by the inspector.

Those inspections are crucial. Failures can be ridiculously expensive. A new conventional drainfield in this county typically runs $15,000 to $30,000 installed. An alternative system on a tight site can run $50,000 or more, and are becoming more and more commonplace. 

Jefferson County's "Sanitarian of the Day" line, 360-385-9444, is staffed Monday through Friday from 9 to 10:30 a.m. on a first-come basis. If you have a question about a specific parcel, that phone call is free and can save you a lot of worry and potentially money. 

Rainwater Catchment

Rainwater catchment is one of those topics where the rules are simple, and the practice is harder than people expect.

The rules first. In October of 2009, Washington State Department of Ecology issued Interpretive Policy 1017, which clarified that rooftop-collected rainwater and guzzler-collected rainwater are not subject to the water right permit process under RCW 90.03. You do not need a water right to collect rain off your roof in Washington, provided two conditions are met: the water is used on the property where it was collected, and the collecting surface is a structure with another primary purpose, like a roof over a barn or a house or a shed. You cannot legally build a "rain collector" whose only function is collecting rain. The roof has to be doing other work first.

For non-potable use, that is essentially the whole story. Water your garden, fill your stock tanks, flush your toilets if you plumb them that way, wash your truck. You are clear. The 2021 Washington Plumbing Code (Chapter 16) governs the system itself if you bring it indoors, and any system that connects to the household plumbing needs to be installed by a Washington-certified plumber and include filtration appropriate to the use. For storage under 360 gallons going to subsurface or non-sprinkled surface irrigation, the treatment specs are relaxed. For larger systems or indoor use, a registered professional engineer has to size and document it.

Jefferson County is one of the counties in Washington that does permit potable rainwater use for a single-family residence. It is not common, it is not cheap, and the system has to be designed, permitted, and inspected through Jefferson County Public Health with treatment, filtration, and disinfection that meet drinking water standards. NSF Standard 55 ultraviolet disinfection, NSF, FDA, or AWWA-rated components, a documented maintenance plan, a debris excluder, real testing. But it is on the table here in a way it is not in much of the rest of the state. King, San Juan, Whatcom, Skagit, and Island counties allow it too. Most of the rest do not.

In many cases, the county will require you to dig for water before permitting a potable rainwater catchment system. I mentioned earlier about areas along the canal that commonly yield salty water. If you can show the county how unlikely it is to hit fresh water on your property, that requirement can sometimes be waived. 

The practice, then. A useful generalization in the corridor: a 1,000-square-foot roof in a 35-inch-rainfall area yields roughly 21,000 gallons a year, assuming 80 percent collection efficiency. That sounds like a lot, and it is. Until you remember that most of the rain falls between October and April, and most of the household demand is May through September. You are not storing a week of water. You are storing a season of water. Tank size and dry-period math is where these systems live or die.

I have seen rainwater catchment work beautifully on properties without good well prospects, and I have seen it become a romantic burden on properties where a well would have been simpler. The honest question is not whether you can do it. It is whether the system you would have to build is the system you actually want to maintain for the next twenty years.

Composting Toilets

Composting toilets generate more hopeful conversation than any other rural plumbing topic I encounter. Buyers picture a cabin without a septic system. A homestead that does not need a $25,000 drainfield. An off-grid life that closes its own nutrient loop.

Some of that is true. Most of it comes with a footnote that could surprise you.

Composting toilets are legal in Washington under WAC 246-272A, the same state on-site sewage rule that governs septics. The Washington State Department of Health maintains a list of registered proprietary composting toilet products under WAC 246-272A-0110, and a local health officer in Jefferson County can issue an installation permit for any unit on that list. 

Non-proprietary, owner-built composting systems are also permittable in this state, with the local health officer reviewing them against the Department of Health's Recommended Standards and Guidance for water-conserving systems.

The footnote nobody wants to hear: greywater still has to go somewhere. A composting toilet handles only blackwater, which is the toilet stream. Everything else, the kitchen sink, the shower, the laundry, is greywater, and under Washington State Board of Health rules it has to be collected, treated, and dispersed through an approved system. Sometimes that is a reduced-size septic tank and drainfield, sized smaller than a full-house system because the toilet load is removed. Sometimes that is a Tier 1 greywater irrigation system under WAC 246-274, which allows up to 60 gallons per day per system and up to two systems per home, with specific requirements on diversion, distribution, and four inches of cover material over the irrigation field. Sometimes you can save a fair bit on a smaller system, but other times, depending on soil type, use requirements, and a myriad of environmental factors, the price difference can be negligible. For a primary residence on a parcel where a conventional septic is feasible, a composting toilet is usually a values choice rather than a savings choice. On parcels where the soils simply will not support a conventional drainfield, the calculus flips. A composting toilet paired with a small greywater system can be the difference between a buildable property and one that just sits there. For a remote cabin, a hunting structure, or a recreational parcel, it can be the only path that works.

What This Is Really About

Rural property out here has a mind of its own. The systems that keep a rural home running are visible, in a way that city systems are not. You can walk to your well. You can see your septic risers. You can hear the rain hitting your collection roof. Nothing is hidden behind a utility company.

That visibility cuts both ways. It means more responsibility. It also means more knowledge of where your water comes from, where it goes, and teaches incredible appreciation for a summer rain. There are people who have watched their grandparents' septic system outlive every kitchen renovation the house has been through. Others know the cost of remediation.

If you are thinking about buying out here, my real advice is this. Read the well log. Read the septic inspection. Walk the property with the documents in your hand. Call the Sanitarian of the Day at 360-385-9444 with the parcel number when you have specific questions. And do not let anyone, including me, tell you what a property is worth before you understand what those reports are saying. The numbers in the rule books are just the start. The property itself is the rest of the conversation and they each have a different story to tell.

Kalan Hatton is a licensed real estate broker (WA #22018439) with Munn Bros Hood Canal Properties. He specializes in rural and unconventional properties throughout Jefferson, Mason, Kitsap, and Clallam counties. Field Notes is published from Quilcene.

Nothing in this article is legal advice. Code references are current as of publication and may have changed since. For specific questions about a specific property, contact Jefferson County Public Health at 360-385-9400 or the Sanitarian of the Day line at 360-385-9444.