The primary inorganic nitrates that may contaminate drinking water are potassium and ammonium nitrate both widely used in lawn and garden fertilizers. Most nitrogenous materials in natural waters tend to convert to nitrate so all sources of combined nitrogen; particularly organic nitrogen and ammonium should be considered as potential sources of contamination.
The EPA defines maximum contaminant level (MCL) allowed in drinking water to be 10 mg/L NO3-N or 45 mg/NO3. Certain populations should monitor nitrate levels to insure they do not suffer any ill health effects.
Filter cartridge Certified to NSF/ANSI Standard 42 and NSF/ANSI Standard 61 for material requirement(s) only.
Filter Cartridge Certified to NSF/ANSI Standard 372 for low lead compliance.