How do I locate the septic tank on a property?
Contact the Health Department to see if they have a file since they have records going back to approximately 1990. If the tank was installed prior to around 1990, they most likely will not have a record. If they do not have a file, you will have to hire a private septic company to come out and locate the septic tank.
Also, if work is going to be done on the septic, a permit is required through the health department.