Sewage discharges: calculator for domestic properties
Daily discharge volume calculator for small sewage discharges from septic tanks and package treatment plants
Applies to England
Documents
Details
Use this calculator tool to work out the daily discharge volume from a septic tank or package treatment plant which is connected to one or more houses or flats.
This will help you decide whether you need to comply with the general binding rules or if you need to apply for an environmental permit.
Updates to this page
Published 4 June 2015Last updated 31 July 2019 + show all updates
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Added the calculator in an open document spreadsheet format.
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First published.