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10 03 21* Other particulates and dust (including ball-mill dust) containing hazardous substances

EWC / List of Waste code · Last checked 21 October 2026 · Applies across the UK (England, Wales, Scotland and Northern Ireland)

Hazardous Mirror entry (hazardous side)

Official description: “other particulates and dust (including ball-mill dust) containing hazardous substances”

Where it sits: chapter 10 (wastes from thermal processes), section 10 03 (wastes from aluminium thermal metallurgy).

What the hazard status means

This is one half of a “mirror” pair. Use this hazardous code if the waste contains hazardous substances above the thresholds, or has hazardous properties. You must assess the waste first, usually by knowing exactly what it is made of or by sampling and testing it.

Its mirror entry

10 03 22 Other particulates and dust (including ball-mill dust) other than those mentioned in 10 03 21 Not hazardous

Using this code

Write the code on the paperwork when waste is passed on: a waste transfer note for non-hazardous waste, or a consignment note for hazardous waste (called special waste in Scotland).
Choose the code from where the waste came from first (the chapter), then what it is. If a load is mixed, you may need more than one code.
The waste must go to a site whose permit allows that code. A registered carrier can tell you which codes they accept: check a waste carrier.
Businesses have a duty of care to describe their waste correctly.

Other codes in section 10 03

10 03 02 Anode scraps Not hazardous
10 03 04* Primary production slags Hazardous
10 03 05 Waste alumina Not hazardous
10 03 08* Salt slags from secondary production Hazardous
10 03 09* Black drosses from secondary production Hazardous
10 03 15* Skimmings that are flammable or emit, upon contact with water, flammable gases in hazardous quantities Hazardous
10 03 16 Skimmings other than those mentioned in 10 03 15 Not hazardous
10 03 17* Tar-containing wastes from anode manufacture Hazardous
10 03 18 Carbon-containing wastes from anode manufacture other than those mentioned in 10 03 17 Not hazardous
10 03 19* Flue-gas dust containing hazardous substances Hazardous
10 03 20 Flue-gas dust other than those mentioned in 10 03 19 Not hazardous
10 03 22 Other particulates and dust (including ball-mill dust) other than those mentioned in 10 03 21 Not hazardous
10 03 23* Solid wastes from gas treatment containing hazardous substances Hazardous
10 03 24 Solid wastes from gas treatment other than those mentioned in 10 03 23 Not hazardous
10 03 25* Sludges and filter cakes from gas treatment containing hazardous substances Hazardous
10 03 26 Sludges and filter cakes from gas treatment other than those mentioned in 10 03 25 Not hazardous
10 03 27* Wastes from cooling-water treatment containing oil Hazardous
10 03 28 Wastes from cooling-water treatment other than those mentioned in 10 03 27 Not hazardous
10 03 29* Wastes from treatment of salt slags and black drosses containing hazardous substances Hazardous
10 03 30 Wastes from treatment of salt slags and black drosses other than those mentioned in 10 03 29 Not hazardous
10 03 99 Wastes not otherwise specified Not hazardous

This page explains the code in plain English. It is not a classification of your waste. The official List of Waste and the classification guidance decide which code applies, and you are responsible for the code you use.