Home owners can call Central District Health for Ada, Boise, Elmore or Valley County or Southwest District Health for Adams, Canyon, Gem, Owyhee, Payette or Washington County to locate records concerning the septic system on their property. They can give directions for location and often can provide a map of the location as well.
Generally there is a cleanout pipe coming from the house to the septic tank. If this pipe can be located, the septic tank is usually located about 10 feet straight out from where the pipe exits the house.
The lid to the septic tank is usually 6-12 inches below the ground, but can be as deep as 3 feet. The lid needed for septic pumping is about the size of a trash can lid. The smaller lid cannot be effectively used to pump the tank and do a proper inspection.