The purpose of the Integrated Regional Water Management Plan is to define a clear vision and direction for the sustainable management of water and land resources in the Greater Los Angeles County region over the next twenty years. The Plan, adopted in December 2006, presents basic information regarding possible solutions, the costs and benefits of those solutions, quantified goals and objectives, and a list of projects that can be implemented to achieve the goals.

Regional collaboration can promote a more efficient, comprehensive, and effective approach to water resource management while being responsive within a regional context to the needs of individual communities and jurisdictions.

The Greater Los Angeles County Region IRWMP serves as the blueprint to facilitate this type of regional cooperation. Today, local agencies, organizations, cities, and county government are working together to implement its goals and objectives. The IRWM process is inclusive, open, and collaborative.

The Region's IRWMP operates under the following governance framework:

Each sub-region has a Steering Committee which serves as the sub-regional decision making-body with input from a broad stakeholder group. Each Steering Committee elects a Chair and Vice-Chair who serve on the Leadership Committee.
A Leadership Committee provides overall guidance to the steering committees and the region-wide planning effort.
The Leadership Committee   comprises sixteen members consisting of the Chair and Vice-Chair of each Sub-regional Steering Committee (ten members) and a representative of each of the five broad water management strategies. The sixteenth member is the Los Angeles County Flood Control District, which acts as the Chair of the Leadership Committee.
The overall Program Manager for the IRWMP planning effort is the Los Angles County Flood Control District. The District is also the recipient of grants for the planning effort and responsible for managing all aspects of the grants.
The overall Program Manager for the IRWMP planning effort is the Los Angeles County Flood Control District. The District is also the recipient of grants for the planning effort and responsible for managing all aspects of the grants.
West Basin Municipal Water District has the fiscal and accounting responsibilities for the non-grant funds for the planning effort and for paying the consultant that has been hired to facilitate the planning effort.
The plan is funded by Proposition 50, Chapter 8 grants administered by the State Department of Water Resources, totaling $1.5 million, and generous contributions from local governments and agencies.

The Council for Watershed Health is an active participant in the GLAC IRWMP. We have a seat on three of the five sub-regional steering committees: Upper Los Angeles River, Upper San Gabriel/Rio Hondo, and Lower Los Angeles/San Gabriel. In addition, Council for Watershed Health Executive Director Wendy Ramallo serves as the Vice-Chair of the Upper Los Angeles River steering committee and holds a seat on the Leadership Committee. There is more information about the GLAC IRWMP on the website at


Greater Los Angeles County Region Objectives and Planning Targets for Year 2026:

Goal: To promote an integrated, multi-benefit, inter-regional approach to regional water management and planning.

Objectives Planning Targets
Improve Water Supply
Optimize local water resources to reduce the Region’s reliance on imported water. *Increase water supply reliability and quality by providing 800,000 acre-feet/year of additional water supply and demand reduction through conservation. *Included within the 800,000 acre-feet/year noted above, reuse or infiltrate 130,000 acre-feet/year of reclaimed water (110 percent increase over existing reclaimed water use).
Improve Water Quality
Comply with water quality regulations (including TMDLs) by improving the quality of urban runoff, stormwater, and wastewater. *Dry weather: Reduce and reuse 150,000 acre-feet/year (~40%) and capture and treat an additional 170,000 acre-feet/year (~50%) *Wet Weather: Reduce and reuse 220,000 acre-feet/year of stormwater runoff from developed areas (~40%) and capture and treat an additional 270,000 acre-feet/year (~50%).
Protect and improve groundwater and drinking water quality *Treat 91,000 acre-feet/year of contaminated groundwater (1.83M acre0feet in 20 years)
Enhance Habitat
Protect, restore, and enhance natural processes and habitats *Restore 100+ linear miles of functional riparian habitat and associated buffer habitat. *Restore 1,400 acres of functional wetland habitat.
Enhance Open Space and Recreation
Increase watershed-friendly recreational space for all communities. *Develop 30,000 acres of recreational open space, focused on under-served communities.
Sustain Infrastructure for Local Communities
Maintain and enhance public infrastructure related to flood protection, water resources, and water quality. *Repair and/or replace 40% of the aging infrastructure.

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