Check your home’s septic records, property survey, or as-built plans
Contact your local health department, building department, or septic installer
Look for inspection or pumping records from previous service providers
Find the main sewer line exit point from your house
Trace the line from the house toward the yard, usually in a straight path
Look for signs in the yard such as greener grass, slight depressions, or access lids
Search for septic tank lids, risers, or inspection ports near the suspected area
Use a metal probe to feel for the tank edges carefully
Check common locations 10 to 25 feet from the house, depending on layout
Inspect near driveways, patios, decks, or landscaping where access may be hidden
Follow the direction of the plumbing vent and bathroom layout to estimate the tank location
Hire a septic professional or utility locator if you cannot find it safely