Nitrate (NO3) comes into water supplies through the nitrogen cycle rather than via dissolved minerals. It is one of the major ions in natural waters. Most nitrate in drinking water is the result of contamination of ground water supplies by septic systems, feed lots and agricultural fertilizers. Nitrate is reduced to nitrite in the body. The Crystal Quest Nitrate Replacement Filter Cartridge contain a special nitrate-selective resin. Nitrate reduction is 90% to 95% and breakthrough is not affected by sulfate levels. The cartridges can be regenerated using sodium chloride brine.

*Capacity is an estimate only and is dependent on influent water contaminants and filter usage.