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Office of Sustainability and the Environment
Urban Runoff Urban Runoff
Code Requirements

For a complete guide to all Code Requirements related to Watershed Management and the development of a Drainage Plan, consult Working for a Cleaner Baypdf symbol 

New Construction and Remodels:

Annual Operations & Maintenance Requirements

Annual Maintenance – property owners or their representatives are required to maintain their rainwater runoff device (BMPs) annually.  The will include an inspection. SMMC 7.10.090 (r)     
Sale or Transfer of Property:

U.S. Environmental Protection Agency
tools for modeling, analysis, calculation

National Stormwater Calculator
A desktop application that estimates the annual amount of rainwater and frequency of runoff from a specific site anywhere in the United States. Estimates are based on local soil conditions, land cover, and historic rainfall records.

Storm Water Management Model
A dynamic hydrology-hydraulic water quality simulation model. It is used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas.

Additional Resources:
Last updated: Wednesday, 01/29/2020
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 © 2021

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