Ask a Durham seller for their septic records and they will usually hand you a pump report, maybe a permit from years back, and a straight face that says the system is fine. It probably is. But the rulebook that report was measured against is not the rulebook Butte County will be using by the time your escrow closes next year. That is not a hypothetical. It is happening on a public timeline right now, and almost nobody outside the county's environmental health office has connected it to what it means for a buyer or seller sitting across the table today.
Durham does not have city water or a sewer main running past the mailbox. It has orchards, open pasture, and homes that sit on their own well and their own tank. That is the default, not the exception, and it is the reason a regulatory update that would be a footnote in Chico is a live wire here.
Durham Runs on Private Water and Private Waste, Not City Hookups
Durham sits outside Chico's incorporated limits, in unincorporated Butte County, on land zoned for agriculture. Properties along roads like Midway Road or Durham Dayton Highway are typical of the pattern: acreage running almonds or walnuts, or open ground for grazing, with a house that draws its own water from a private well and disposes of its own wastewater through an onsite septic system rather than a municipal hookup. There is no alternative utility to fall back on if something is wrong. The well and the tank are the infrastructure.
That means every Durham transaction, whether it is a first-time buyer looking at a small farmhouse or an investor eyeing a parcel with an existing home and outbuildings, runs through Butte County's rules for water wells and onsite wastewater treatment systems, known in county code as Chapter 23B for wells and Chapter 19B for septic. Those two chapters, and the technical manuals that sit underneath them, are the actual rulebook a buyer's lender, inspector, and escrow officer will lean on. Butte County itself has said the core provisions in that rulebook have gone roughly a decade without a significant update.
The County Is Rewriting the Rules Underneath Every Listing
That decade-long gap is why Butte County Public Health launched what it calls the Rural Water Safety Project, a multi-year review of both the well ordinance and the septic ordinance. Nikolay Ostrovskiy, the county's senior program manager for public health, described the goal in blunt terms when he spoke to a Redding television station about the launch: "We want to improve consistency and clarity in both the well and the septic requirements."
The county opened two public surveys, one for well owners and one for septic system users, alongside a public meeting held on July 22, 2026, at the county's Human Resources Training Rooms in Oroville. The surveys stayed open through August 21, 2026, and were aimed squarely at the people who deal with these systems for a living or for their own property: septic system users, well owners, well drillers, septic contractors, owner-builders, and anyone who has gone through the permit process.
This is not a symbolic gesture. The county's own project page lays out a working timeline: technical memorandums summarizing the update priorities are being developed through summer and fall of 2026, draft ordinance revisions are expected in late 2026 into early 2027, and the finished ordinances are anticipated to go before the Board of Supervisors and the Regional Water Quality Control Board for adoption by early 2028. Part of the motivation is aligning local rules with a statewide update to the California Department of Water Resources' well construction standards, known as Bulletin 74, which the state has targeted for 2026 as well.
Where the Rewrite Actually Stands This Fall
Here is the state of play as of this September, in one place, because the county's information is spread across a project page, a couple of local news write-ups, and a set of documents most buyers never think to look for.
| Milestone | Status |
|---|---|
| Public surveys on well and septic ordinances | Closed August 21, 2026 |
| Public input meeting in Oroville | Held July 22, 2026 |
| Technical memorandums identifying update priorities | In progress through fall 2026 |
| Draft ordinance revisions | Expected late 2026 into early 2027 |
| Board of Supervisors and Regional Water Quality Control Board review | Anticipated late 2027 |
| Final ordinance adoption | Targeted for early 2028 |
The practical upshot is that anyone buying or selling in Durham between now and 2028 is transacting under a set of well and septic standards the county has already flagged as outdated and is actively rewriting. The permit your seller pulled five years ago was issued under the rules in force at the time. The rules a new owner might need to lean on for a repair, an addition, or a future resale could look different by the time that need arises.
Paradise Plays by a Different Book
One detail worth knowing if you are cross-shopping Durham against other parts of Butte County: this entire ordinance rewrite does not apply everywhere. Butte County's own wastewater program materials note that the county-administered septic ordinance and manual govern onsite systems everywhere in the county except the Town of Paradise, which maintains its own separate standards.
That matters because it means the regulatory ground under a Durham acreage parcel and a Paradise rebuild are not the same ground, even though both sit in Butte County and both often rely on private wells and septic. A buyer comparing a Durham farmhouse to a newer build on the Ridge is not just comparing square footage and lot size. They are comparing two different regulatory environments, one of which is currently being rewritten and one of which is not part of that process at all.
What This Means If You're Listing or Making an Offer Now
None of this should scare a buyer away from Durham, and it should not push a seller to delay a listing that is otherwise ready. It should change what questions get asked and how much time gets built into escrow.
If you are selling, pull the well log and septic permit now rather than waiting for a buyer to ask. Note the date the system was permitted and under which version of the manual, since that becomes a reference point if a buyer's lender or inspector has questions. If your system has not been evaluated in several years, an updated inspection gives a buyer something current to point to rather than a report the county itself might consider dated.
If you are buying, ask directly whether the seller's well and septic paperwork reflects an evaluation done under the current manual or an older one, and build a little extra runway into your inspection contingency. Rural inspections in Butte County already take longer to schedule than a standard city inspection, and a countywide ordinance review in progress is one more reason not to assume a fast turnaround.
If you are planning any future work on the property, a new well, a septic upgrade, an added bedroom that changes system capacity, know that the standards you would be permitted under today are the same ones the county has already said it intends to replace. That does not mean wait. It means go in with your eyes open about which version of the rulebook you are building against.
Does this affect a septic system that is already installed and working fine? The county has not proposed specific regulatory changes yet, so it is too early to say whether or how existing, functioning systems would be affected. The review is still in the technical memorandum stage.
When would new rules actually apply to a permit application? Not before the ordinances are formally adopted, which the county is targeting for early 2028. Anyone applying for a well or septic permit between now and then is working under the current Chapter 23B and Chapter 19B standards.
Is Chico different from Durham on this? Yes. Most of Chico proper runs on municipal water and sewer, so this entire conversation does not apply to a typical in-town purchase. Private wells and septic are the norm in Durham because it sits in unincorporated, agriculturally zoned county land.
If you are weighing a Durham purchase or getting ready to list acreage of your own, our guide to preparing a small-acreage home for sale in Durham walks through the practical side of getting a rural property market-ready, and our buyers guide and sellers guide cover the broader process step by step. You can also read the county's own well and septic ordinance update page or the current septic ordinance text if you want to see exactly what is on the table.
Durham rewards buyers and sellers who do their homework on the details that do not show up on a listing sheet. If you want a second set of eyes on what a well and septic report actually tells you about a specific Durham property, or you are ready to find out what your acreage is worth in today's market, reach out to Lora Trenner and start with a Get Your Instant Home Valuation request through the site.
