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Septic Compass is a free service that connects homeowners with licensed local septic companies. We are not a contractor and do not perform septic work.

The short answer

Septic tank size is set by the number of bedrooms, which stands in for likely occupancy. A 3-bedroom home typically needs a 1,000-gallon tank; a 4-bedroom home usually needs 1,250 gallons. Local health codes set the minimum, so always confirm your county's bedroom-to-gallon requirement before installing or replacing.

Common minimum tank size by bedroom count
BedroomsMinimum tank size
2–31,000 gallon
41,250 gallon
5–61,500 gallon
Common Questions

Tank Sizing & Capacity: questions homeowners ask

Is Septic Compass a septic company?

No. Septic Compass is a free matching service. We are not a contractor and do not perform septic work — we connect you with licensed local companies who do.

Does it cost anything to use?

It's free for homeowners. The companies in our network pay to receive matched leads, so you're never charged for the connection.

How fast will a company contact me?

For routine work, usually the same day. For emergencies like a backup, we prioritise companies with 24/7 crews so you're connected fast.

Are the companies licensed?

We match you with companies that carry the licensing their state requires for septic work. Always confirm the details before hiring.

Related

More on septic systems

Sources

Where these figures come from

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