Cucamonga Valley Water District looks to USFilter for nitrate removal

The Cucamonga Valley Water District receives a large portion of its water from Los Angeles' Metropolitan Water District (MWD). The MWD determined there was an imminent chance of failure in the city supply line and notified the district that it would need to shut off its supply for several weeks while repairs were made. The city had a choice of either bringing nitrate contaminated wells back on line to make up for the short fall or impose severe water rationing...

LOS ANGELES, CA, Aug. 25, 2005 -- The Cucamonga Valley Water District (CVWD) in Rancho Cucamonga, Calif., receives a significant portion of their water from Los Angeles' Metropolitan Water District (MWD) of Southern California. The MWD determined that there was an imminent chance of failure in the supply line to the city and notified the CVWD that they would need to shut off their supply for several weeks while repairs were made. The city had a choice of either bringing nitrate contaminated wells back on line to make up for the short fall or impose severe water rationing on the community they supply.

Solution
USFilter's solution included placing two mobile demineralizer trailers on the well site using new NSF anion resin in chloride form in the ion exchange process. A nitrate effluent level of below 5 ppm can be achieved via mobile demineralization. The resin exchanges were performed on-site by swapping out trailers so the CVWD would not experience downtime due to resin regeneration. Further, since they did not have a connection to a local brine line, the trailers were easily and quickly regenerated at USFilter's Los Angeles regeneration facility as trailers were exhausted.

Results
USFilter was able to help CVWD avoid imposing sever water restrictions. Within hours of start-up, USFilter achieved an effluent level below 5 ppm.

For a more detailed report on this project, see: "Cucamonga Valley Water District Project Profile".

For related USFilter applications, see: "Mobile and On-Site Services - Case Studies".

Based in Warrendale, Pa., with offices and installations around the world, USFilter (www.usfilter.com) is a $1.2 billion water company with 5,800 experienced professionals dedicated to delivering cost-effective, reliable water and wastewater treatment systems and services. It's a unit of Siemens A.G.

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