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Office of Sustainability and the Environment
Urban Runoff Urban Runoff
Watershed Management

Mission Statement

The mission of the Watershed Management Plan (WMP) is to restore a healthier balance between the urban environment and the natural ecosystem, including the Santa Monica Bay, by reducing the pollution in urban runoff, reducing urban flooding, and increasing water conservation, recreational opportunities, open space, and wildlife and marine habitat.


Santa Monica's Watershed Management Plan, completed in April 2006, is a dynamic plan to move the City toward a more sustainable management of its local water resources and water quality protection and improvement of the Santa Monica Bay.

LA County Municipal Stormwater Permit Report: 

2016 Stormwater Permit Report (2 MB) pdf symbol

Watershed Management Plans: 

Watershed Management Plan (6 MB) pdf symbol
Airport Sub-Watershed Management Plan (6 MB) pdf symbol
Last updated: Monday, 12/11/2017
ARCSA is your rainwater harvesting resource.  Visit for listing of installers, to learn how to become certified to become an installer or inspector and more.    


Rain Harvest Rebate Program

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Harvesting rainwater protects the Bay from runoff and makes watering your yard fun.  

If that's not enough incentive, how about receiving a generous rebate?  


Matrix 2.0 Alternative Water Guidelines 

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download (pdf)
New roadmap for decentralized, alternate water supplies - indoor and outdoor non-potable water regulations streamlined for rainwater, graywater, stormwater, blackwater use.
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City of Santa Monica © 2020

Santa Monica Office of Sustainability and the Environment
1685 Main St., Santa Monica, CA 90401 · (310) 458-2213 · TTY (310) 917-6626