Brunswick County water quality is the first thing a lot of my buyers ask about, and the answer here is a genuine comeback story. This is the Brunswick County water quality deep dive in my Cape Fear water series. For the big-picture overview – what GenX and PFAS are and how the three counties compare – start with Water in Wilmington, NC: What Every Buyer Asks.
Brunswick County has the most dramatic water story of the three Cape Fear counties – and, for buyers, arguably the most encouraging. This is the county a 2019 Environmental Working Group study flagged as having, by far, the highest PFAS levels of 44 U.S. water systems tested. It’s also the county that responded by investing heavily in reverse osmosis treatment. Here’s where things actually stand in 2026, particularly regarding Brunswick County water quality.
I’m a REALTOR®, not a toxicologist – everything below is sourced from public utility records, EPA guidance, and local reporting, with links throughout.
Table of Contents
Brunswick County Water Quality: What You Need to Know
Geography. Brunswick County sits farthest downstream on the Cape Fear River from the Chemours Fayetteville Works plant, so everything discharged upstream flowed past its intake. And historically the county’s Northwest Water Treatment Plant used conventional treatment that wasn’t designed to remove PFAS. That combination is why testing once found combined PFAS well above EPA’s health benchmarks. It wasn’t that Brunswick did anything wrong – it inherited the worst position on the river.
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The Turnaround: Two Reverse Osmosis Stories
1. H2GO‘s Belville plant (Leland area) – already running. H2GO Brunswick Regional Water & Sewer brought a $42 million reverse osmosis plant online in May 2023. The clever part: instead of treating river water, H2GO pulls from deep aquifers 320 to 600 feet underground that H2GO reports aren’t contaminated with PFAS, then runs it through reverse osmosis. H2GO serves Leland, Belville, and parts of Navassa – worth knowing if you’re buying in Leland.
2. Brunswick County’s Northwest plant – expected by the end of 2026. The county is finishing a huge upgrade that adds low-pressure reverse osmosis (LPRO) to its Northwest Water Treatment Plant. Low-pressure RO is one of the few treatment methods shown to remove PFAS, GenX, 1,4-dioxane, and other contaminants. Once complete, county officials say it will be the second-largest reverse osmosis plant in the nation, treating more than 36 million gallons a day. The project has faced construction delays and contractor disputes that pushed completion back. In an August 2026 update, the county said the reverse osmosis system is expected to be fully operational by the end of 2026 – so if you’re reading this later, it’s worth checking the county’s project page for the latest status.
What This Means for Your Address
Brunswick actually has two water stories running side by side right now, and which one applies to you comes down entirely to where the home sits. If you’re buying into the Leland/Belville area served by H2GO, you’re already getting reverse-osmosis-treated water drawn from deep aquifers – check H2GO’s water quality reports for the latest results. If you’re on Brunswick County’s main system, which covers much of Southport, Oak Island, St. James, Bolivia, and beyond, reverse osmosis treatment is coming countywide once the Northwest plant’s RO upgrade goes live, which the county expects by the end of 2026. Check the top of the water bill on the seller’s disclosure, or just ask me, so you know exactly what’s coming out of the tap on day one.
A couple of situations fall outside either utility. Some coastal and rural properties in Brunswick run on private wells, and no utility treatment reaches those at all – if that’s the home you’re considering, add a full PFAS panel to your inspection contingency, since the standard well test won’t catch it. And if you close before the county’s new plant comes online, the county reports that the water you’re getting still meets federal standards; it’s simply the older, conventional treatment rather than RO. An under-sink filter is an easy way to close that gap in the meantime.
What Buyers Can Actually Do
- Filter now if you don’t want to wait. An under-sink reverse osmosis unit runs $200 to $500 installed and brings PFOA, PFOS, GenX, and most other PFAS to non-detect at the tap you drink from – the simplest bridge if you’re on the county system before the new plant opens. Want the whole house covered instead? A GAC system treating every fixture runs $1,500-$4,000, and it’s worth pricing out if you’re already remodeling.
- On a well? Get it tested before you buy. A full PFAS panel isn’t part of a standard well inspection, so you have to ask for one specifically. Clean Cape Fear keeps a current list of local testing resources if you need a referral.
The Bottom Line
Brunswick County’s water arc is a genuine comeback story on the Cape Fear. The county that once had the highest PFAS levels of the 44 systems EWG tested now has an operating reverse osmosis plant in the Leland area, and a countywide RO upgrade that officials say will be the nation’s second-largest is expected online by the end of 2026. If water treatment is a priority for you, the key is knowing which utility serves your specific address and checking that utility’s latest water quality reports.
Frequently asked questions
Who provides water in Brunswick County, NC?
It depends on the address. H2GO Brunswick Regional Water and Sewer serves Leland, Belville, and parts of Navassa, while Brunswick County’s main system covers much of Southport, Oak Island, St. James, Bolivia, and beyond. Some coastal and rural properties are on private wells, so check the top of the water bill on the seller’s disclosure.
How does H2GO treat water in Leland, NC?
H2GO brought a $42 million reverse osmosis plant online in May 2023. It draws from deep aquifers 320 to 600 feet underground that H2GO reports aren’t contaminated with PFAS, then treats that water with reverse osmosis. H2GO’s official site is the place to check its current water reports.
When will Brunswick County’s Northwest Water Treatment Plant reverse osmosis upgrade be finished?
In an August 2026 update, Brunswick County said the low-pressure reverse osmosis system is expected to be fully operational by the end of 2026, after construction delays and contractor disputes pushed completion back. Once complete, it is expected to treat more than 36 million gallons a day. Check the county’s Northwest Water Treatment Plant project page for the latest status.
Why did Brunswick County have high PFAS levels?
Brunswick County sits farthest downstream on the Cape Fear River from the Chemours Fayetteville Works plant, and its Northwest Water Treatment Plant historically used conventional treatment that wasn’t designed to remove PFAS. A 2019 Environmental Working Group study flagged the county as having the highest PFAS levels of 44 U.S. water systems tested.
What should I do if a Brunswick County home is on a private well?
Add a full PFAS panel to your inspection contingency, because a standard well test won’t catch PFAS and no utility treatment reaches a private well. Clean Cape Fear keeps a current list of local testing resources.
House hunting in Leland, Southport, Oak Island, St. James, or anywhere in Brunswick County and want help confirming which utility serves a home – or a referral to a local water-testing lab? Reach out anytime at 910-983-8963.
Keep reading: New Hanover / CFPUA water guide · Pender County water guide · The big-picture Wilmington water overview
Tabetha Klein is a REALTOR® with Coldwell Banker Sea Coast Advantage in Wilmington, NC, serving New Hanover, Brunswick, and Pender counties. This post is informational and is not health, legal, or environmental advice. Always consult licensed professionals for testing and treatment decisions on your specific property. Each office is independently owned and operated. Equal Housing Opportunity.
Sources & Further Reading
- Brunswick County: Northwest Water Treatment Plant Expansion & RO Upgrades
- WUNC: Brunswick County almost finished installing PFAS water treatment system (Feb 2025)
- Port City Daily: Insurer to complete delayed water treatment plant (Aug 2025)
- WECT: H2GO’s reverse osmosis plant begins pumping water (May 2023)
- H2GO Brunswick Regional Water & Sewer – official site
- Environmental Working Group: North Carolina PFAS contamination spotlight
- Clean Cape Fear: Water testing resources
