The Arcata Marsh and Wildlife Sanctuary is home to the City of Arcata’s innovative wastewater treatment facility. The sanctuary is 307 acres, including freshwater marshes, salt marsh, tidal sloughs, grassy uplands, mudflats, brackish marsh, approximately 5 miles of walking and biking paths and an Interpretive Center.

Arcata is a small city located on the Northern California coast in Humboldt County. Situated approximately 280 miles north of San Francisco, Arcata is known for its natural beauty, vibrant community, and connection to the surrounding natural environment. At the 2020 census, Arcata's population was 18,857.