Disposal & recovery code
D6Release into a water body, except seas/oceans
D6 is one of the 15 disposal operations (D1–D15) DEFRA recognises: release into a water body, except seas/oceans. It records what happened to the waste at its destination, and is required on every movement filed to the digital waste tracking service.
- Code
- D6
- Operation type
- Disposal (D code)
Sourced from DEFRA’s digital waste tracking reference data, last checked 25 July 2026.
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Other disposal & recovery codes
- D1Deposit into or onto land, e.g. landfill
- D2Land treatment, e.g. biodegradation of liquid or sludgy discards in soils
- D3Deep injection, e.g. injection of pumpable discards into wells, salt domes or naturally occurring repositories
- D4Surface impoundment, e.g. placement of liquid or sludgy discards into pits, ponds or lagoons
- D5Specially engineered landfill, e.g. placement into lined discrete cells which are capped and isolated from one another and the environment
- D7Release into seas/oceans, including sea-bed insertion
- D8Biological treatment resulting in final compounds or mixtures which are discarded by any of the operations numbered D1 to D12
- D9Physico-chemical treatment resulting in final compounds or mixtures which are discarded by any of the operations numbered D1 to D12, e.g. evaporation, drying, calcination
- D10Incineration on land
- D11Incineration at sea
- D12Permanent storage, e.g. emplacement of containers in a mine
- D13Blending or mixing prior to submission to any of the operations numbered D1 to D12