State Limits may be lower.Methyl ethyl ketoneMethyl ethyl ketone is a synthetic chemical used as a solvent for paints, coatings, adhesives, printing inks, and other industrial and consumer goods; it occurs naturally in some vegetation and forms during ozonation of drinking water. 1.1 ppb2.2 ppbNo4000 ppbLegal at any levelThis is the Federal Limit.