North Coast Chapter of the California Native Plant SocietyAn organization of amateurs and professionals dedicated to the preservation of California's native flora. Arcata.
California Land Use Planning Information NetworkProvides land use data throughout California, sorted by county.
Marine Wildlife Care CenterA rehabilitation center for oiled seabirds at Humboldt State University, part of the Oiled Wildlife Care Network. Arcata.
Humboldt BaykeeperHumboldt Baykeeper is working to protect and enhance Humboldt Bay and near-shore waters through community education, water-quality monitoring and pollution control.