See published bedroom-based minimums from two state rules. Your county health department sets the rule that applies to you.
How it works
Looks up gallons by bedroom count in the selected rule. New York starts at 1,000 gallons for one to three bedrooms and adds 250 for each additional bedroom, and Washington starts at 1,000 gallons through four bedrooms.
Before you order
- A permit and soil evaluation come before any tank size is final.
- A garbage grinder adds solids, and New York counts it as one more bedroom.
- Tanks need pumping on a schedule regardless of size.
Common questions
Why are only two states shown?
We only include tables we could confirm from published rules. Most other states and counties have their own minimums, so call yours.
Is bedroom count the same as people?
Rules use bedrooms because that is what a house can hold in the future, whether or not they are full now.