Sanitizing and disinfecting compositions with relatively low levels of free available chlorine, with good effectiveness against microbes, included in a burstable pouch of a system also including a plurality of initially undosed (e.g., dry) wipes in a resealable package thereof. The composition may include less than 0.5% by weight hypochlorite or other free available chlorine level, with a pH less than 12. The composition is long term stable in the pouch, but upon bursting of the pouch and dosing of the wipes, exhibits only short-term stability. Because of the low level of hypochlorite, the dosed wipes exhibit improved surface compatibility and negligible “bleach” odor, while providing at least a 3-log reduction in C. diff population within 10 minutes.