Guidance

D2 waste exemption: depositing waste from train toilets

The D2 exemption allows older rolling stock not fitted with appropriate collection facilities to deposit sanitary waste on to the track.

Applies to England

This exemption allows train operators to empty waste from a train toilet or sink on to a railway track.

Type and amount of waste you can deposit

Waste code Type of waste
20 03 99 Waste from railway sanitary conveniences only

You can deposit up to 25 litres of waste per discharge. 

There is no limit on the number of discharges you can make.

Conditions

You must comply with the exemption conditions. The waste you discharge must match the waste code, type of waste, and quantities allowed. 

You cannot: 

  • discharge waste from the toilet or sink of any other type of vehicle, such as a bus 

  • discharge any other types of waste on to a railway track 

  • bring in sanitary waste from trains operating on a different railway line

Registering a D2 waste exemption  

You must register with the Environment Agency.

A railway track is an example of a linear network. A linear network is an area where the length runs across more than one postcode. It is not a single site.

You can register once to cover waste activity along the whole linear network.

You will need to:  

  • register in the name of the operator, at their registered office or main place of business  

  • identify the network to which the exemption applies

  • use this registration form to register a linear network  

More than one railway operating company can register D2 at the same linear network at the same time.

Contact the Environment Agency  

General enquiries

National Customer Contact Centre
PO Box 544
Rotherham
S60 1BY

Email enquiries@environment-agency.gov.uk

Telephone 03708 506 506

Telephone from outside the UK (Monday to Friday, 8am to 6pm GMT) +44 (0) 114 282 5312

Monday to Friday, 8am to 6pm.

Updates to this page

Published 12 September 2019
Last updated 9 June 2025 show all updates
  1. Updated with information about registering a railway line as a linear network.

  2. First published.

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