This whole house nitrate removal water filter will effectively remove nitrate toxicity from the water throughout the entire house (or drinking water) to provide safer water for the whole family. It uses strong base anion exchange resins which are supplied in the chloride form as moist, tough, uniform spherical beads, and are designed specifically to remove nitrates preferentially in the presence of sulfates and other divalent ions. Often found in rural areas, nitrate levels should not exceed 10 mg/L based on EPA standards. This is especially important for newborn infants and babies as they can suffer from blue baby syndrome which is a life-threatening condition. This filter measures to 20”L x 4-1/2”D for industry standard size and compatibility. It is compatible with 20” Big Blue (BB) style filter housings which are sold separately. Or 2.5" x 20" for Slim Standard Systems, 4.5"x10" compatible with Big Blue, or 2.5"x 9.75" for under-sink Reverse Osmosis Drinking Water Filtration Systems.Nitrate Filter Cartridge Benefits *Eliminate nitrates to produce safer drinking water for families with newborns & babies *Reduces the possibility of blue baby syndrome for infants on breast milk & formula *Protects fish and aquarium life from toxic nitrate poisoning These Filters utilize a white bead strong base anion resin for the selective removal of nitrates. Often found in rural areas, nitrate levels should not exceed 10 mg/L. This is especially important for newborn infants of up to six months. Competing ions, especially sulfate should be accounted for when calculating capacity. Influent and effluent nitrate levels should be monitored to ensure adequate removal.