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10 05 99 Wastes not otherwise specified

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

Not hazardous Absolute non-hazardous entry

Official description: “wastes not otherwise specified”

Where it sits: chapter 10 (wastes from thermal processes), section 10 05 (wastes from zinc thermal metallurgy).

What the hazard status means

Waste that matches this description is not hazardous waste. Check that nothing hazardous has been mixed in: a load that contains hazardous waste needs a different code.

Codes ending in 99 (“not otherwise specified”) are a last resort. Use a more specific code if one fits the waste.

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 05

10 05 01 Slags from primary and secondary production Not hazardous
10 05 03* Flue-gas dust Hazardous
10 05 04 Other particulates and dust Not hazardous
10 05 05* Solid waste from gas treatment Hazardous
10 05 06* Sludges and filter cakes from gas treatment Hazardous
10 05 08* Wastes from cooling-water treatment containing oil Hazardous
10 05 09 Wastes from cooling-water treatment other than those mentioned in 10 05 08 Not hazardous
10 05 10* Dross and skimmings that are flammable or emit, upon contact with water, flammable gases in hazardous quantities Hazardous
10 05 11 Dross and skimmings other than those mentioned in 10 05 10 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.

10 05 99 Wastes not otherwise specified

What the hazard status means

Using this code

Other codes in section 10 05

Official sources