A lot of buyers ask us about the water here. Usually it comes up quietly, somewhere between the second showing and the inspection, and usually after someone back home sent them a news story about the Cape Fear River. Fair question. Here’s the short answer: Brunswick County is finishing a big reverse osmosis upgrade at the plant that supplies Sunset Beach, and the county says it’s built to pull out GenX, 1,4-dioxane and other PFAS.The longer answer is worth a few minutes, especially if you’re relocating to Sunset Beach from somewhere that never had to think about this.
Where Sunset Beach Tap Water Actually Comes From
Sunset Beach doesn’t run its own water system anymore. The town handed that job to Brunswick County years ago, so homes in town get water and a bill from Brunswick County Public Utilities.
That water starts in the Cape Fear River. The county treats it at the Northwest Water Treatment Plant. There’s a second county plant, the Highway 211 plant, that runs on groundwater wells, but it mostly serves the Southport, St. James and Oak Island side of the county. Down here at the state line, the county says customers get their water solely from the Northwest plant.
So the Northwest plant is the one that matters for Sunset Beach homes.
What’s Changing at the Northwest Plant
Back in 2017, word got out that the Cape Fear had been contaminated with PFAS from Chemours’ Fayetteville Works facility. These are the “forever chemicals” you’ve probably read about. The county started hunting for a fix right away, piloted low-pressure reverse osmosis in 2018, and found it knocked most PFAS down to undetectable levels in that pilot.
Then came the long part.
Construction started in summer 2020. It ran behind, the county and its contractor ended up in a fight, and in 2025 the county terminated the contract before the surety companies stepped in to take the project over and get it moving again. Not exactly a smooth ride. As of the county’s August update, the expanded capacity was due that month and the reverse osmosis system was expected to be running by the end of the calendar year. You can check the latest status on the county’s Northwest Water Treatment Plant project page.
The numbers, briefly
- Conventional treatment grows from 24 million to 48 million gallons per day.
- Reverse osmosis capacity of at least 36 million gallons per day.
- Paid for with about $167.3 million in revenue bonds issued in 2020.
The county is also part of a lawsuit, with other utilities in the region, against DuPont and Chemours to recover what it’s spending. That case is still going.
Does This Change Anything for Buyers?
Honestly? It mostly takes a worry off the table. We’ve had buyers from up north and out west who nearly passed on the coast over this, and that always struck us as a shame, because the county has been testing for PFAS for years and posting the results publicly.
Here’s how we’d think about it during a purchase.
Check where the house gets its water
Most homes in town are on county water. A few properties in the wider area still run on private wells, and well water is a whole different conversation since none of this plant work touches it. Ask the listing agent, look at the seller’s disclosure, and if it’s a well, budget for your own testing. It belongs on the same list as the other local things to check before you buy.
Ask about filters that are already installed
Some owners here have added under-sink reverse osmosis units or whole-house filters. Find out if it stays with the house, when the filters were last changed, and who services it. Your inspector may note it, but don’t count on a deep look. Our buyer’s guide to the inspection report covers what inspectors usually flag and what they skip.
Look at the county’s test results yourself
This is the part most people skip, and it’s free. Brunswick County posts its PFAS lab reports on its water test results page, going back to 2017. Ten minutes of reading beats a week of guessing from headlines.
Weighing a Move to Sunset Beach?
Water, flood zones, HOAs, insurance. Frank and Karen walk buyers through the stuff that doesn’t show up in listing photos. Call or text (910) 612-1931 or send us a note.
What About Ocean Isle, Holden Beach and the Rest of the County?
Ocean Isle Beach and Holden Beach buy their water wholesale from the county, so they’re on the list of places that benefit too. Oak Island and Southport get a blend of both county plants. If you’re still comparing towns, our Sunset Beach vs. Ocean Isle Beach breakdown is a better place to start than water, since on this one they’re basically in the same boat.
A quick reality check
Nobody can promise a project date until it’s done, and this one has slipped before. We’d rather tell you that straight than oversell it. What we can say is the county’s direction hasn’t changed since 2017, and the fix it chose is the one it calls the most effective option out there.
Good to know: Water is just one line item. If you’re running the full math on living here, look at our take on the cost of living in Sunset Beach and how flood insurance affects home value.
Sunset Beach Water: Common Questions
Where does Sunset Beach get its drinking water?
From Brunswick County Public Utilities. The county treats Cape Fear River water at its Northwest Water Treatment Plant, and Sunset Beach customers get their water solely from that plant.
What is the Northwest Water Treatment Plant upgrade?
It adds a low-pressure reverse osmosis system the county says will remove GenX, 1,4-dioxane and other PFAS, and it doubles conventional treatment from 24 to 48 million gallons per day.
When will the reverse osmosis system be running?
In its August 2026 update, the county said the system was expected to be operational by the end of calendar year 2026. Check the county’s project page for the latest status.
Can I see PFAS test results for Brunswick County water?
Yes. The county posts its PFAS lab reports online, with results going back to 2017.
Does the upgrade help homes on private wells?
No. It only treats county water. If a home runs on a private well, the owner is responsible for testing and treating it.
Questions About a Specific Home?
We’ll help you figure out its water source, filters and anything else worth asking before you sign.