Ion Exchange

Trace contaminants in water must be removed from muncipal drinking water or wastewater applications to meet health and safety regulations. Using selective contaminant removal or advanced IX filtration technology, DuPont IX resins address the removal of trace contaminants such as boron, chromate, nitrate, perchlorate, PFOS, PFOA, organics, color and more.

Reverse Osmosis

FilmTec RO technology provides the finest level of filtration, acting as a barrier to reject all salts and inorganic molecules. We provide the most widely used RO technology in the world and as a result, FilmTec is trusted globally by municipalities.


FilmTec NF elements can be used to purify public drinking water in areas where salts such as calcium and magnesium must be reduced, but the highest level of sodium rejection with RO membranes is not required. Compared to lime softening and zeolite softening technologies, nanofiltration membrane softening is a less-expensive alternative. The FilmTec NF270 nanofiltration membrane, for example, offers low salt rejection, low energy consumption, and stable performance after repetitive cleaning. These features make it a prime choice for contaminated surface waters.


Feed water sources vary greatly so an area's ability to produce drinking water may have unique challenges. DuPont's IntegraPac UF membranes provide the right solution for producing drinking water for a wide range of feed waters. Whether it’s a relatively clean or complex water source, we can help bring cost-effective, clean drinking water to communities.

Case Study

Nanofiltration Produces Sparkling Clean Water for Swedish Resort Community
Lofsdalen, Sweden, had an outdated water treatment process complicated by variable water quality from an unreliable source. Using FilmTec™ NF255-400 membranes, the town could pull water from Lake Lofssjön, remove the contaminants, and provide sparking clean drinking water to the town residents and tourists.
FilmTec™ NF270-400 Element Helps National Park Service Improve Water Quality
The Denver Service Center of the U.S. National Parks struggled to treat tricky water that needed to meet EPA secondary Standards. Check out the full article to see the raw water constitutes, met requirements, and reduced operational cost.
FilmTec™ BW30-400 Elements: Municipal Application on Well Water
New thin-film composite FilmTec™ BW30-400 elements were installed in an existing FilmTec™ RO treatment system, replacing old but not expired elements with the latest, higher-performing, technology. The new membranes improved the overall capacity for the Island Water Association (IWA) on Sanibel Island, which allowed for the cancelation of a major plant expansion.