Water Testing and Analysis for Reverse Osmosis (RO) Systems

What should you test for in industrial reverse osmosis (RO) systems? See the list of cations and anions below that should be analyzed and measured when conducting RO water testing.

Nancrede Engineering offers comprehensive water analysis services for industrial, laboratory, and healthcare environments including reverse osmosis water testing and can create a comprehensive plan of action to improve your water purity. Request RO water testing right now.

See our free industrial reverse osmosis calculator to help you determine the correct industrial RO specifications for your water requirements.


  • Ammonium: NH4+
  • Calcium: Ca2+
  • Magnesium: Mg2+
  • Barium: Ba2+
  • Strontium: Sr2+
  • Sodium: Na+
  • Potassium: K+
  • Ferrous Iron: Fe2+
  • Ferric Iron: Fe3+
  • Aluminum: Al3+
  • Manganese: Mn2+
  • Imidogen: NH3/NH4 – N


  • Bicarbonate: HCO3– Alk (CaCO3)
  • Carbonate: CO32– Alk(CaCO3)
  • Total Alk (CaCO3)
  • Carbon Dioxide: CO2
  • Phosphate: Ortho-PO43-
  • Sulfate: SO42-
  • Nitrate: NO3
  • Fluoride: F
  • Chlorine: Cl
  • Bromine: Br
  • Silica: SiO2
  • Sulfur Trioxide: NO3-N
  • Sulfur Dioxide: NO2-N
  • Sulfides (as S2-)
  • Boron: B
  • Arsenic: AS (III)
  • Arsenic: AS (V)

Nancrede Engineering offers free basic water testing to qualified engineers and industrial and healthcare organizations. Contact us right now at information@nancrede.com or 888-569-2837 if you need industrial RO repair services or would like a quote on an industrial reverse osmosis system.

See helpful related information: What is the difference between TSS and turbidity?