What is the gallons per day (gpd) limit that is allowed in a single AES or Enviro-Septic® System bed (or per section of a combination System)?

The gallons per day (gpd) limit for a single bed or for a combination System varies per state and based on the approval that has been granted. Anything over the approved gallons per day (gpd) will need to be designed as a combination system. Please reference your state specific design and installation manual.