The septic system failure rate seems low, are there other alternative data?
Yes. The failure rate data have very high uncertainty. Users are encouraged to obtain the septic failure rate from their local health departments. Besides the data from the ‘STEPL Input Data Server’ (National Environmental Service Center formally National Small Flow Clearinghouse, 1992 and 1998), Electric Power Research Institute conducted a state-by-state survey on septic failure rate.
