Ontario waste class 321 Leftovers from making or setting off explosives.

Free, no account
Based on Ontario Regulation 347 and registration guidance
Nothing is stored

Ontario other wastes
Explosive production/detonation waste

Ontario group: explosive manufacturing wastes.

Waste from explosives production & detonation, in Ontario's group of explosive manufacturing wastes.

Is Ontario 321 hazardous waste?

Not from the code alone. Ontario 321 names the waste stream. Whether the waste is subject waste depends on its hazardous characterization or liquid-industrial status, and on the exclusions. The waste number also needs a primary characterization letter after the 3-digit class.

For subject waste, the generator enters the class-and-letter waste number in the waste details of the Ontario hazardous waste manifest. Ontario’s exclusions and shipment rules apply.

What does Ontario 321 cover?

Waste from making or setting off explosives. Examples are wastewater-treatment sludge or spent carbon from explosive manufacture, TNT-production red water or pink water, and residue from lead-based initiating compounds. Whether it is hazardous is a separate decision under Ontario’s waste rules.

Rule: Registration guidance manual, Appendix A: Ontario waste classes

Is explosives waste Ontario 321 or another class?

Code	When it fits
321	The stream is waste from explosive manufacture or detonation products.

When several characterizations apply, the registration flowchart picks the primary one. The 3-digit class doesn’t replace the flowchart or the exclusions.

Which wastes take Ontario 321?

Waste	When it’s 321
Sludge left by wastewater treatment	It comes from explosives work and can react.
Carbon after use	It comes from explosives work and can react.
Red or pink process water from TNT manufacture	It comes from explosives work and can react.
Residue produced by lead-based initiating compounds	It comes from explosives work and can react.

Which codes sit beside Ontario 321?

Code	What it is
331	Compressed gases and cylinders