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19 01 13* Fly ash 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: “fly ash containing hazardous substances”

Where it sits: chapter 19 (wastes from waste management facilities, off-site waste water treatment plants and the preparation of water intended for human consumption and water for industrial use), section 19 01 (wastes from incineration or pyrolysis of waste).

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

19 01 14 Fly ash other than those mentioned in 19 01 13 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 19 01

19 01 02 Ferrous materials removed from bottom ash Not hazardous
19 01 05* Filter cake from gas treatment Hazardous
19 01 06* Aqueous liquid wastes from gas treatment and other aqueous liquid wastes Hazardous
19 01 07* Solid wastes from gas treatment Hazardous
19 01 10* Spent activated carbon from flue-gas treatment Hazardous
19 01 11* Bottom ash and slag containing hazardous substances Hazardous
19 01 12 Bottom ash and slag other than those mentioned in 19 01 11 Not hazardous
19 01 14 Fly ash other than those mentioned in 19 01 13 Not hazardous
19 01 15* Boiler dust containing hazardous substances Hazardous
19 01 16 Boiler dust other than those mentioned in 19 01 15 Not hazardous
19 01 17* Pyrolysis wastes containing hazardous substances Hazardous
19 01 18 Pyrolysis wastes other than those mentioned in 19 01 17 Not hazardous
19 01 19 Sands from fluidised beds Not hazardous
19 01 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.