Nitrates have no detectable color, taste or smell at the concentrations involved in drinking water supplies, and they do not cause discoloration of plumbing fixtures, so they remain undetectable to our senses. Often found in rural areas, nitrate levels should not exceed 10 mg/L based on EPA standards. This is especially important for newborn infants because their bodies are particularly susceptible to negative health effects of nitrates. Influent and effluent nitrate levels should always be monitored to ensure adequate removal from drinking water sources

The legal limit for nitrates is 50mg/l. A nitrate reduction system is made up of a vessel filled with nitrate selective resin with a multiport valve on the top. As the water passes through the resin the nitrate is trapped.

Periodically this nitrate needs to be removed by regenerating with salt. As the nitrate levels vary from month to month a time based regeneration system is recommended. Systems are vessel based, and come with a separate brine tank to hold the salt.