Under the Canterbury Air Regional Plan, if your property is less than 2 hectares, you can't burn outdoors (unless you're cooking). If your property is 2+ hectares, you can burn outdoors if conditions are met. Anyone undertaking crop residue burning needs a smoke management plan.
Call Environment Canterbury on 0800 324 636 or visit their website (external link)
Waimakariri Fire and Emergency
0800 658 628