EWC Codes Explained: How to Classify Waste Correctly

EWC codes are the 6-digit codes from the List of Wastes used to describe every type of waste handled in the UK. The first two digits identify the chapter, such as chapter 17 for construction and demolition (C&D) waste or chapter 20 for municipal waste. The next two digits narrow it to a sub-chapter, and the final two digits identify the specific waste type.

This structure, sometimes referred to as WM3 guidance territory, means codes are consistent across the industry: 17 04 05 always means iron and steel waste, wherever in the UK it's logged. Getting the chapter and sub-chapter right first makes it much easier to land on the correct specific code.

Different sectors tend to use a recurring set of codes. Construction and demolition work sits mainly in chapter 17, household and commercial waste collection in chapter 20, and metal recycling across chapters 16, 17 and 19 depending on the source of the metal.

These are common starting points, not a definitive list. The right code always depends on the specific waste and its source, and must be confirmed against the current List of Wastes.

Start with the source of the waste, not just what it looks like. The same material can carry different codes depending on whether it came from a construction site, a household collection or a manufacturing process, because the List of Wastes classifies by activity as well as material.

Work through the chapters in order: find the chapter that matches the activity that produced the waste, then the sub-chapter, then the specific entry. If a hazardous and non-hazardous mirror pair exists, assess the waste's actual composition before picking one. When in doubt, check the current List of Wastes rather than relying on memory or an old list, as entries can be updated.