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One Water Honolulu

Collaborating for a thriving and climate resilient O’ahu

For an island community, water is at the center of planning and building for climate resilience. The City and County of Honolulu is embracing a holistic approach to water and infrastructure management known as One Water to act on solutions for a Climate Ready O’ahu.

Our Mission

The mission of One Water Honolulu is to champion cost-effective and climate-resilient infrastructure services and natural systems for the people, culture, and sustainability of O’ahu through integration and innovation in planning, implementation, and maintenance.

Changes to Our Island

Too much and too little water: These climate hazards are not new to our island, but the intensity and frequency at which we experience them are expected to increase.

Sea Level Rise

Heat

Drought and Wildfire

Flash Flooding

Hurricanes

Preparing for Climate Impacts

From mauka to makai, One Water Honolulu is a shared effort among government, community, and private partners to implement actionable steps to adapt, modernize and maintain infrastructure, and to safeguard natural systems to enable our communities to withstand increasing climate-related impacts now and into the future.

Build climate resilience into City services

Adapt critical coastal infrastructure to rising sea level

Maximize efficiencies, minimize waste, and integrate the management of water resources

Sustain collaboration between government, landowners, developers, and community

Taking Action On Climate Ready O’ahu

In February 2024, the Honolulu City Council adopted Climate Ready O’ahu, an adaptation strategy to prepare, protect, and safeguard community members, ‘āina, and infrastructure from a changing climate.

One Water Honolulu is how the City and County, and its partners, plan to implement strategies and actions to address climate change impacts and foster resilient, climate ready infrastructure. Climate Ready O’ahu called for the Panel to create a One Water planning framework which will establish plans for coordinated infrastructure development, identify priority projects, and develop project scopes and budgets.

One Water Honolulu identifies common goals and shared responsibilities across eight City and County of Honolulu departments to plan, design, fund, and construct vital infrastructure projects and restore natural systems.

What Guides Our Actions

Community | ʻĀina | Infrastructure

Our actions work toward a resilient natural and built environment for our communities and ‘‘āina. These actions enable us to advance projects to address climate impacts on water, wastewater, and stormwater infrastructure. It’s a holistic and collaborative approach to investing in infrastructure across our water cycle that will improve critical services for our communities.