An antimicrobial composition comprising: 0.01 to 15 wt% of a first quaternary ammonium composition comprising didecyl dimethyl ammonium chloride or a derivative thereof; and 0.01 to 15 wt% of a second quaternary ammonium composition comprising benzalkonium chloride (BKC) or a derivative thereof; wherein the antimicrobial composition comprises at most 10% wt of C2 to C3 monohydric alcohols; and wherein the additive concentration of non-ionic and anionic surfactant in the antimicrobial composition is less than 5 wt% based on the weight of the antimicrobial composition; and wherein the antimicrobial composition further comprises a pH indicator.