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Sources for The Marsh That Treats Sewage Is Getting More Machinery

Published Sep 13, 2026

Sources Used

  1. Wastewater Treatment Facilities Improvements Project

    City of Arcata / 2026 / Primary; municipal capital-project page

    The condition of aging facilities, treatment sequence, six treatment marshes and three enhancement marshes, ultraviolet disinfection capacity, project components, and regulatory purpose.

    Accessed 2026-09-12

  2. Current City Construction Projects

    City of Arcata / 2026 / Primary; municipal construction update

    The $54 million Phase One cost, project status, ultraviolet system operation, outfall work, and major construction milestones.

    Accessed 2026-09-12

  3. Wastewater

    City of Arcata / 2026 / Primary; municipal utility overview

    The collection system, pump stations, treatment ponds, marsh acreage, environmental monitoring, and public-access relationship.

    Accessed 2026-09-12

  4. Wastewater Treatment

    Friends of the Arcata Marsh / Undated / Interested-party; nonprofit operational explanation

    The sequence from headworks and primary treatment through oxidation ponds, treatment marshes, ultraviolet disinfection, enhancement wetlands, and Humboldt Bay.

    Accessed 2026-09-12

  5. History

    Friends of the Arcata Marsh / Undated / Interested-party; nonprofit historical account

    The site's industrial and sewage history, George Allen's aquaculture experiments, Robert Gearheart's test wetland cells, and 1983 state approval.

    Accessed 2026-09-12

  6. Arcata Wastewater Treatment Facility Feasibility Study

    City of Arcata / 2026 / Primary; municipal planning study page

    The current evaluation of sea-level rise and coastal hazards and the need to plan treatment options beyond 2055.

    Accessed 2026-09-12

  7. Constructed Wetlands for Wastewater Treatment and Wildlife Habitat: 17 Case Studies

    U.S. Environmental Protection Agency / 1993 / Primary-context; federal technical case-study collection

    Arcata's early role as a constructed-wetland wastewater case study and the operational relationship between treatment and habitat.

    Accessed 2026-09-12

  8. Arcata Marsh.JPG

    Monotropa uniflora / 2010-05-01 / Image source; creator-uploaded photograph

    The appearance of a treatment pond and the photographer's public-domain dedication.

    Accessed 2026-09-12

Image Sources

  1. A wastewater treatment pond at the Arcata Marsh and Wildlife Sanctuary, looking toward forested hills.

    Monotropa uniflora / 2010-05-01 / Public domain; the copyright holder released the photograph for unrestricted use.

    Permission contact: No additional permission required. Preserve the creator and Wikimedia Commons credit for provenance.

    Original file: https://commons.wikimedia.org/wiki/Special:Redirect/file/Arcata_Marsh.JPG