Documents & codes
What is an EWC code (List of Waste code)?
An EWC code is the six-digit code from the List of Waste that classifies a waste type. It identifies what the waste is and whether it is hazardous, and it appears on transfer and consignment notes.
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<img src="https://wasteoptix.co.uk/glossary/ewc-code/diagram.svg" alt="EWC code — diagram from WasteOptix" width="880" height="620" loading="lazy">
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<a href="https://wasteoptix.co.uk/glossary/ewc-code">What is an EWC code (List of Waste code)?</a> — diagram by
<a href="https://wasteoptix.co.uk">WasteOptix</a>
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</figure>The list is organised by the process or industry that produced the waste, not by what the material looks like. The same substance can carry different codes depending on where it came from, which is why classification starts with the source.
Some codes are mirror entries: a pair where one is hazardous and one is not, and which applies depends on whether dangerous substances are present above thresholds. Those are the entries that need assessment rather than a judgement call at the tailgate.
The code drives what happens next — who may carry it, where it may go and what documentation it needs. A wrong code is therefore not a clerical error; it can authorise a movement that should not have happened.
What goes wrong in practice
- A default code applied across a whole round regardless of what was actually collected.
- Mirror entries resolved by assumption rather than by assessment of the waste.
- Codes carried forward from a previous job on a similar-looking site.
- Classification treated as a paperwork step after collection rather than a decision before it.