Teknova’s water meets the standard for ASTM TYPE I. It is delivered at a resistance of 18 megaohms then purified by ion exchange and a charged carbon adsorption column, and undergoes reverse osmosis, UV treatment, and sterile-filtration with a 0.1 micron filter. Teknova offers molecular biology–grade water for PCR applications, reagent-grade water, DEPC-treated water for RNA work, and cell culture–grade water for the preparation of tissue culture reagents and media.