1 1:99 diluted household bleach (mixing 10ml of bleach with 1litre of water) can be used for general household cleaning. 2  1:49 diluted household bleach (mixing 10ml of bleach with 0.5litre of water) is used to disinfect surfaces or articles contaminated with vomitus, excreta, secretions or blood.leach containing 5.25% sodium hypochlorite should be diluted as follows (demonstration short): 1:99 diluted household bleach (mixing 10ml of bleach with 1litre of water) can be used for general household cleaning.