WaterWorks™ Nitrate / Nitrite test strips for water quality testing are the ideal solution when portable, reliable results matter. Whether you are testing well water or your tap at home, these strips are the best choice. Designed to be safe and simple, these strips require no technical training to achieve results. Two units of measure are available depending on your detection needs: The first solution reports results and Nitrogen (as N). The second solution reports results as Total Nitrate (as NO3) or Nitrite (as NO2).