The Pollution Inventory (PI) in England, Wales and Northern Ireland, and the Scottish Pollution Release Inventory (SPRI) is the mechanism by which the regulatory agencies (the Environment Agency, Natural Resources Wales, Scottish Environment Protection Agency and the Northern Ireland Environment Agency) compile information and provide public access to the quantities of specific substances discharged to water, air and land. The Pollution Inventory estimator tool enables Water Companies to report their annual returns via an auditable method in the absence of routine monitoring data for a substance of interest. A number of changes have been made to the list of substances to be reported in 2014 onwards and the estimator tool has been updated to reflect these changes. The procedure described is expected to be used in conjunction with the updated estimator tool (version 7.0), with reference to the User Guide, both of which are included.

Water Company Members can access this tool free of charge by using the menu below.

Non Water Company users are able to purchase the tool and accompanying report from our Publications Library.