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10 10 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 10 (wastes from casting of non-ferrous pieces).

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 10

10 10 03 Furnace slag Not hazardous
10 10 05* Casting cores and moulds which have not undergone pouring, containing hazardous substances Hazardous
10 10 06 Casting cores and moulds which have not undergone pouring, other than those mentioned in 10 10 05 Not hazardous
10 10 07* Casting cores and moulds which have undergone pouring, containing hazardous substances Hazardous
10 10 08 Casting cores and moulds which have undergone pouring, other than those mentioned in 10 10 07 Not hazardous
10 10 09* Flue-gas dust containing hazardous substances Hazardous
10 10 10 Flue-gas dust other than those mentioned in 10 10 09 Not hazardous
10 10 11* Other particulates containing hazardous substances Hazardous
10 10 12 Other particulates other than those mentioned in 10 10 11 Not hazardous
10 10 13* Waste binders containing hazardous substances Hazardous
10 10 14 Waste binders other than those mentioned in 10 10 13 Not hazardous
10 10 15* Waste crack-indicating agent containing hazardous substances Hazardous
10 10 16 Waste crack-indicating agent other than those mentioned in 10 10 15 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 10 99 Wastes not otherwise specified

What the hazard status means

Using this code

Other codes in section 10 10

Official sources