Multiple treatment options evaluated
CDM Smith tested GAC, ion exchange, LPRO, UV-AOP and biofiltration to identify the most effective PFAS removal approach.
Removing PFAS with RO to protect public health
PFAS contamination, including high concentrations of perfluoro-2-propoxypropanoic acid (known by its trade name GenX) threatened Brunswick County’s water supply. County leaders acted swiftly, integrating a low-pressure reverse osmosis (LPRO) system to ensure safe, compliant water for a rapidly growing community.
Piloted LPRO to confirm results
The team ran a 15-month pilot, testing four membrane brands, proving LPRO removed PFAS and GenX to non-detectable levels.
Integrated LPRO with plant expansion
Northwest WTP expansion from 24- to 48-mdg incorporated LPRO, currently treating 41.2 mgd with capacity to expand to 48 mgd.
Cutting long-term operating costs
Analysis showed LPRO will cost 20% less to operate over 25 years than alternative technologies while maintaining compliance.
Construction of the LPRO system is underway and expected to be completed in late 2026. Once operational, it will be the largest LPRO system on the East Coast and the third largest in the U.S. County staff are sharing lessons with peers and regulators to expand their knowledge on emerging contaminants. “CDM Smith is proud to be the county’s trusted partner in tackling this challenge,” said Reed Barton, client service leader.