Clean Water Branch

Watershed Planning and Polluted Runoff Control

A watershed-based plan is a strategy and a work plan for achieving water resource goals for a specific watershed. The watershed planning process uses a series of cooperative, iterative steps to characterize existing conditions, identify and prioritize problems, define management objectives, and develop and implement protection or remediation strategies. Resources for developing watershed-based plans include the Hawaiʻi Watershed Guidance and the EPA’s watershed planning handbooks, guides, and tools.

Clean Water Act Section 319 funds are used to develop and implement watershed-based plans. The PRC Program supports and coordinates watershed planning activities. Only watersheds that have watershed-based plans or alternative watershed-based plans approved by the PRC Program are eligible for Section 319 project funds. Approved watershed-based plans and alternative watershed-based plans are available to view and download below and are also available on the Clean Water Branch System website. The PRC Program maintains a list of eligible watersheds, which are displayed on the interactive map below. Click here to view a map of eligible watersheds in a new tab.

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Watershed-Based Plans

Below is a list of watersheds with approved watershed-based plans. Watersheds with a TMDL are noted; the full TMDL reports are available on the Clean Water Branch’s Integrated Report and TMDL webpage.

Kauaʻi

• Hanalei Bay watershed (includes Hanalei, Waikoko, Waipa, and Waioli)
  • Watershed Management Plan for Hanalei Bay Vol. 1 Watershed Characterization (2012)
  • Watershed Management Plan for Hanalei Bay Vol. 2 Strategies and Implementation (2014)
  • TMDL Phase 1 – Streams and Estuaries (2008)
  • TMDL Phase 2 – Embayment (2011)
• Nawiliwili Bay watershed (includes Puali, Huleʻia, and Nawiliwili)
  • Restoration and Protection Plan for the Nawiliwili Watershed (2004)
  • TMDL (2008)

Oʻahu

• Ala Wai watershed (includes Manoa-Palolo, Makiki, and Ala Wai)
  • Management and Implementation Plan (1998)
    • Volume I
    • Volume II (Appendices A-C, Appendices D-J)
  • Ala Wai Canal TMDL (2002)
• Honouliuli watershed
  • Watershed-Based Management Plan for Honouliuli Watershed (2013)
• Kaiaka Bay (includes Kiʻikiʻi and Paukauila)
  • Kaiaka Bay Watershed-Based Plan (2018)
    • Volume 1 Watershed Characterization
    • Volume 2 Implementation Plan
    • Appendix A – Geomorphic Assessment of Poamoho Stream
    • Kaiaka Bay WBP 2018 Community Meeting Presentation
  • N. and S. Fork Kaukonahua Stream TMDL (2009)
• Kapakahi Stream watershed
  • Kapakahi Stream Watershed Plan (2006)
• Koʻolaupoko watersheds (includes watersheds from Kualoa to Makapuʻu)
  • Koʻolaupoko Watershed Restoration Action Strategy (2007)
  • TMDLs
    • Kaneohe Stream TMDL (2009)
    • Kawa Stream TMDL (2005)
    • Waimanalo Stream TMDL (2001)
• Maʻiliʻili watershed
  • Maʻiliʻili Watershed Management Plan (2014)

• Waikele Watershed
  • Waikele Watershed Plan
  • Waikele Watershed Plan with appendices

• Wailupe Stream watershed
  • Watershed Based Plan for Reduction of Nonpoint Source Pollution in Wailupe Stream Watershed (2010)
    • Appendix A
    • Appendix B

Molokaʻi

• Kawela watershed
  • Alternative Watershed-Based Plan for the Kawela Watershed, Molokaʻi, Hawaiʻi (2019)

Maui

• Southwest Maui watersheds (includes Hapapa, Wailea, Moʻoloa)
  • Southwest Maui Watershed Management Plan (2019)
• West Maui watersheds (includes Honokowai, Wahikuli, Kahana, Honokahua and Honolua)
  • Wahikuli-Honokowai Watershed Management Plan Vol. 1 Watershed Characterization (2012)
  • Wahikuli-Honokowai Watershed Management Plan Vol. 2 Strategies and Implementation (2012)
  • Kahana, Honokahua and Honolua Watersheds Characterization Report (2016)
  • Kahana, Honokahua and Honolua Watersheds Strategies and Implementation Report (2016)

• South Central Maui watershed
  • Pohakea Watershed Plan Final Report (2023)
  • Ma’alaea Bay Watersheds Management Plan (2023)

Kahoʻolawe

• Kaulana and Hakioawa watersheds
  • Watershed Based Plan for Kaulana and Hakioawa (2006)
• Kamohio watershed
  • Watershed Based Plan for Kamohio (2022)

Hawaiʻi

• Pelekane Bay watershed (Kawaihae watershed)
  • Pelekane Bay Watershed Management Plan (2005)

• Waikoloa-Waiʻulaʻula Stream watershed
  • Waiʻulaʻula Watershed Management Plan (2011)