EWC Codes: The Complete UK Waste Carrier's Guide

What Is an EWC Code?

Every time you move controlled waste, the Waste Transfer Note you complete needs to describe what you're carrying. That description isn't freeform — it has to use a code from the European Waste Catalogue, known as an EWC code.

EWC codes are six-digit numbers that classify waste by its source and type. They're a legal requirement on all Waste Transfer Notes under the Environmental Protection Act 1990 (Duty of Care Regulations). Get the code wrong — or leave it blank — and the WTN is non-compliant, no matter how good everything else looks.

If you've ever stared at a list of codes wondering which one applies to a load of mixed plasterboard and broken tiles, this guide will give you a clear, practical answer.

How EWC Codes Are Structured

The catalogue is organised into 20 chapters, each covering a broad waste source. Within each chapter, codes drill down from chapter level to subchapter to specific waste type.

Each code has three pairs of digits:

• First two digits — the chapter (e.g. 17 = Construction and demolition waste)

• Middle two digits — the subchapter (e.g. 17 01 = concrete, bricks, tiles, ceramics)

• Last two digits — the specific waste type (e.g. 17 01 03 = tiles and ceramics)

So 17 01 03 tells you: construction waste / concrete and ceramics group / tiles specifically. Once you understand the pattern, the system is far less intimidating.

The Chapters Most Relevant to UK Waste Carriers

You don't need to memorise all 20 chapters. Most independent carriers regularly deal with a handful. Here are the ones that come up most often:

Chapter 17 — Construction and demolition waste The chapter you'll use most if you work on building sites or run skip hire. Covers concrete, bricks, timber, metals, glass, insulation, mixed C&D waste, and excavated material.

Chapter 20 — Municipal and similar commercial/industrial waste Covers general household and trade waste — everything from garden waste (20 02 01) to mixed municipal waste (20 03 01). If you're collecting from domestic or commercial premises, this is your starting point.

Chapter 15 — Packaging waste Cardboard (15 01 01), plastic packaging (15 01 02), mixed packaging (15 01 06). Common on commercial clearances.

Chapter 16 — Wastes not otherwise specified Catch-all codes for waste that doesn't fit elsewhere, including end-of-life vehicles and some mixed loads.

Chapter 19 — Wastes from waste treatment Relevant if you're working with waste processing facilities rather than original waste sources.

Hazardous Waste: The Asterisk That Changes Everything

Some EWC codes have an asterisk (*) at the end. That asterisk means the waste is classified as hazardous.

Hazardous waste is subject to entirely different rules — separate consignment note requirements, registered carriers, approved facilities. If you see an asterisk on a code, stop and check whether you're authorised to carry that waste and whether you're using the right documentation. A standard WTN is not sufficient for hazardous waste.

Examples of asterisked codes you might encounter:

• 17 06 01* — insulation materials containing asbestos

• 17 09 03* — other construction waste containing hazardous substances

• 20 01 21* — fluorescent tubes and other mercury-containing waste

If you're unsure whether a waste is hazardous, the Environment Agency's hazardous waste guidance and the full EWC list (available on GOV.UK) are the authoritative sources.

The "Mirror Codes" — Absolute vs. Hazardous

Some waste types appear twice in the catalogue — once with an asterisk (hazardous) and once without (non-hazardous). These are called mirror entries.

An example: insulation waste.

• 17 06 03* — other insulation materials consisting of or containing hazardous substances

• 17 06 04 — insulation materials other than those mentioned in 17 06 03*

Which one applies depends on what the insulation actually contains. You need to know the composition of the waste before you can classify it correctly. If in doubt, treat it as hazardous until you've confirmed otherwise.

How to Find the Right EWC Code in Practice

Step 1: Identify the source of the waste. Where did this waste come from? A demolition site? A domestic property? A manufacturing process? The chapter follows the source.

Step 2: Narrow by material type. Within the relevant chapter, work through the subchapters. The descriptions aren't always obvious, but they're specific enough to guide you.

Step 3: Check for hazardous indicators. Scan for asterisked codes in that area. If there's a mirror entry, confirm the composition of the waste before committing to the non-hazardous code.

Step 4: When in doubt, use a non-specific code — correctly. Some carriers reach for 20 03 99 (municipal waste not otherwise specified) or 17 09 04 (mixed construction waste) as a default. These are legitimate codes, but only use them when you genuinely can't be more specific. Blanket use of non-specific codes can attract scrutiny from the Environment Agency.

What Happens If You Use the Wrong Code?

A Waste Transfer Note with an incorrect EWC code fails its legal purpose. If the waste is hazardous and you've classified it as non-hazardous — even unintentionally — you're potentially in breach of the Hazardous Waste Regulations 2005.

Even for non-hazardous mistakes, a pattern of incorrect classification is the kind of thing that comes up during an EA compliance audit. Your WTNs are supposed to form an accurate audit trail. If they don't, that's a problem.

The practical protection is simple: take the time to classify correctly, use a process that makes it easy to record the right code, and keep your documentation in order.

WTNcloud includes EWC code selection as part of the WTN creation process, making it faster to pick the right code and produce a fully compliant note — in under 30 seconds, even without mobile signal.

EWC Codes and the DEFRA Digital Waste Tracking Rollout

From October 2026, DEFRA's mandatory Digital Waste Tracking system will require waste movements to be recorded digitally. EWC codes will remain central to that process — they're how the system categorises and tracks what's moving through the waste chain.

If you're not already familiar with how digital tracking will work, our post on DEFRA Digital Waste Tracking: What Changes for Waste Carriers in 2026 covers what you need to know.

Summary

EWC codes are a legal requirement on every Waste Transfer Note. They follow a logical three-tier structure — chapter, subchapter, specific type — and most carriers regularly use only a handful of chapters. The main things to get right: match the code to the actual source and type of waste, check for hazardous asterisks, and use non-specific codes only when nothing more precise applies.

Get the classification right, keep your WTNs in order, and you've got a clean audit trail that protects your business.

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