Alternative Leach Drains
In certain parts of the Busselton region, you may require a nutrient retentive system. Nutrient retentive leach drain systems have a conventional septic tank and a leaching field (leach drain) which contains an amended soil column. The effluent from the leach drain flows through the amended soil which binds phosphorus from the effluent before disposal into the ground.
Only nutrient retentive leach drain systems that have been approved by the WA Department of Health will be permitted to be installed. Please refer to this list when considering nutrient retentive leach drains.