An antimicrobial composition including from about 3 g to about 10 g of a first component, from about 0.5 g to about 1.625 g of a second component, and 3786 mL of water. The first component includes from about 0.8 g to about 5 g of the following benzyl ammonium salts: from about 0.04 g to about 0.2 g of C12 dimethyl benzyl ammonium chloride； from about 0.50 g to about 5.0 g of C14 dimethyl benzyl ammonium chloride； and from about 0.064 g to about 0.6 g of C16 dimethyl benzyl ammonium chloride. The first component further includes from about 0.8 g to about 2 g of the following ethylbenzyl ammonium salts: from about 0.02 g to about 1.3 g of C12 dimethyl ethylbenzyl ammonium chloride； and from about 0.01 g to about 0.64 g of C14 dimethyl ethylbenzyl ammonium chloride. The first component further includes from about 0.10 g to about 6 g of urea. The second component includes trichloromelamine.
