Trade waste is commercial and industrial liquid waste that is disposed of through the Christchurch City Council sewerage system, e.g. discharge from restaurants, takeaway outlets, food processors, metal finishers, service stations, and chemical manufacturers. Trade waste does not include wastewater from toilets or bathrooms.
The increasing number of commercial and industrial operations results in a significant increase in the amount of trade waste discharged through the sewer network. Trade waste is not necessarily toxic but can be harmful if discharged directly into the sewer without first having problem substances removed. Such substances can:
Fees and charges relating to trade waste
Information for business about what happens if unpermitted discharges occur.
All businesses that produce liquid trade waste and discharge to the sewer system must apply for a consent or registration to discharge.
Preliminary treatment of trade waste to remove or reduce harmful substances may need to occur before discharging into the public sewer.
Sampling is normally carried out for businesses with discharge volumes of more than 1,245m³ per annum.