The New Zealand Land Treatment Collective (NZLTC) was established in 1989 to support research into the treatment of wastes and waste products by land application, by providing its members with up-to-date information on land treatment technology, research and information.

The NZLTC works to improve communication to all stakeholders in the waste management industry and to help fund research into developing and improving land treatment technology in New Zealand.

The NZLTC has members from research organisations, universities, district and regional councils, government departments, and environmental and engineering consulting companies.