Lowering the pH of NEO water also corresponded to increased ORP, which also leads to increased reduction of E. coli O157:H7 and other microorganisms (Yang et al., 2003; Liao et al., 2007; Huang et al., 2008).
Yang et al. (2003) determined that HOCl concentration and ORP of NEO water increased when the pH was decreased from 9 to 4.