Plug bathtub and sink drains to prevent sewage backup. In an emergency such as a large magnitude earthquake, sewer lines will probably be damaged and become inoperable. Sewage may back up and broken water lines may become contaminated by sewage. If stoppage in sewer lines is suspected or obvious, discontinue discharge of wastewater in house or building sinks and drains and stop flushing toilets. Household disinfectant can be used for odor control.
Final disposal can be by burying or by sanitary sewer when notified by public health officials.
A dug latrine or trench 2 to 3 feet deep can be used by bury human waste. Spread a thin layer of powdered lime or dry chlorine bleach and a layer of earth each time it is used. Mark the latrine site with a stick so others know where it is. Portable camp toilets, RV toilets, porta-potties, etc. High occupancy complexes such as apartments, condominiums, and office buildings should consider making arrangements to obtain commercial chemical toilets.