Western Chapter International Society of Arboriculture

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Multi-state professional arboriculture association

Mission and Description

Four-state professional association advancing arboriculture through research, education, certification support, professional standards, events, and member networking.

Organization Information

Browse category: Arboriculture and Urban Forestry

Organization type: Arboriculture Association

State: California

Service area: Multi-State

City / area: Arizona, California, Hawaii, and Nevada

Programs and membership: Independent nonprofit ISA chapter formed in 1934 with more than 3,500 members, elected leadership, committees, professional membership, certification and continuing-education support, an annual conference, regional workshops, publications, awards, and current 2026 activities

Meetings and events: Professional arboriculture, tree care, research, education, certification support, continuing education, public awareness, tree preservation, professional ethics, networking, conferences, publications, and workforce development

Reported operating status: Active

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