VOC refers to “volatile organic compound”; some examples are paint thinner, mineral spirits, alcohol, gasoline, ethylene glycol, acetone and xylol. VOCs are harmful to both people and the environment.  Most architectural paints contain some VOCs.  The EPA is limiting the level of VOCs in paints, because when they evaporate into the air when the paint dries, they can contribute to low-level smog generation. Ask your estimator about low-VOC options.