CLCA – California Licensed Contractors Association

The California Licensed Contractors Association (CLCA) is a non-profit organization arranged to encourage interest in landscape and recognize the contractors who produce outstanding work in their field. Its members consist of state licensed contractors interested in making the public aware of the significant danger of using an unlicensed contractor.  The CLCA is an invaluable resource for consultations on planning, installing and maintaining water efficient landscapes.

ISA – International Society of Arboriculture

The International Society of Arboriculture (ISA) has served the tree care industry for over eighty years as a scientific and educational organization. ISA continues to be a dynamic medium through which arborists around the world share their experience and knowledge for the benefit of society. ISA, aligned on many fronts with other green organizations, is working hard to foster a better understanding of trees and tree care through research and the education of professionals as well as global efforts to inform tree care consumers.

PAPA – Pesticide Applicators Professional Association

The Pesticide Applicators Professional Association (PAPA) is a California non-profit, public benefit corporation dedicated to continuing education and to the implementation of safe and effective pest control techniques. They sponsor statewide educational programs in cooperation with the University of California and offer industry training in safety, rules and regulations, current technology and field tested research for pest management professionals.