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To implement a coherent classification system for water purity at Aqua Laboratory, we make use of several key factors describing the various properties of water. The Conductivity of Water Conductivity is reported as microSiemens per centimeter (µS/cm) at 25oC and is the reciprocal of resistivity and provides a measure of a fluid's ability to conduct electrical current. The Resistivity of Water Reported as Mega-Ohms per centimeter (MO-cm) at 25oC, resistivity is related to conductivity: a high resistivity equals a low conductivity. As such, it also provides a measure of the water's ionic content. Unlike conductivity, resistivity is primarily used in the assessment of ultrapure water. Organic Compound Levels in Water Organic compounds can exist in water in numerous forms and so measuring every single one individually is impractical. Instead, the most useful indicator is considered to be the total organic carbon (TOC) content of the solution. This is measured via a process that oxidizes the organic compounds present and then quantifies the oxidation products generated. AQUA LABORATORY runs all captured water through a 185nm ultra-violet filter on the way to your UN approved food grade container to ensure extremely low TOC levels in your finished product. AQUA LABORATORY  - THE GOLD STANDARD IN PURE STEAM DISTILLED WATER. Perfect for daily use and a whole myriad of uses including cosmetics manufacturers, colloidal silver, colloidal copper and colloidal gold manufacturers to name a few of our existing and repeat customers. Ingredients: Pure Steam Distilled Water at <1 PPM (0 parts per million at source)