A stable, low VOC, low viscosity biocide formulation comprising an effective amount of at least one biocide, and a alkyl poly glycol liquid carrier of formula (I): R&mdashO-(AO)n&mdashH, wherein R is a C1-C3 alkyl AO is an ethyleneoxide group, a propy-leneoxide group, a butyleneoxide group, or a block or random copolymer of two or more groups selected from an ethyleneoxide group, a propyleneoxide group, and a butyleneoxide group and n is the average number of repeating AO units and is at least 4.
