Guidance

H1 annex J5: infiltration worksheet

Tool to assist groundwater risk assessment for treated effluent discharges to infiltration systems.

• From: Environment Agency
• Published: 1 December 2014
• Last updated: 15 April 2026
  Show all updates

  1. 15 April 2026

     Added text to clarify that this tool is designed to assess concentrations at the compliance point. To understand pollutant fate and transport within the plume, an alternative, more detailed model should be used (for example, ConSim).

  2. 15 February 2022

     Published version 3.0 of the worksheet. The previous version had mathematical errors. These are now corrected.

  3. 1 December 2014

     First published.

Documents

Annex J5: infiltration worksheet

403 KB

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Annex J5: infiltration worksheet user manual

PDF, 1.09 MB, 50 pages

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Details

Use this worksheet to assist groundwater risk assessment for treated effluent discharges to infiltration systems.

It should be used in conjunction with the user manual.

This tool is designed to assess concentrations at the compliance point. To understand pollutant fate and transport within the plume, an alternative, more detailed model should be used (for example, ConSim).