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  BU637 Domestic on-site foulwater treatment

An on-site treatment system is an option where no sewer connection is available or, where permitted, an owner wants to reduce demand on mains foulwater networks.

To ensure optimum performance, correct design and installation of the system together with ongoing maintenance are essential.

This bulletin looks at options available for on-site treatment and disposal systems for domestic installations.

This bulleting covers: 

  • Statutory requirements
  • Treatment systems
  • First stage - treatment
  • Second stage - land application
  • Tertiary filtration and treatment
  • Consent application
  • Maintenance
  • Problems