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Drainage Services                          

The LOCSD Utilities Department maintains four drainage pump stations throughout Los Osos.  They are located at the corners of Don Avenue and Mitchell Drive; 8th Street and El Moro Avenue; 16th Street and Paso Robles Avenue; and, 6th Street and El Moro Avenue.  In addition to the drainage pump stations, LOCSD crews maintain five drainage retention basins in Los Osos. The drainage retention basins are Bay Oaks, East Tierra, and Tierra retention basins in the Bayridge Estates subdivision; Madera retention basin in Cabrillo Estates; and, Los Arboles retention basin in Vista de Oro.

Some areas in Los Osos have a history of flooding, especially during heavy rains.  The LOCSD is committed to addressing these flooding problems, working to provide information and solutions, and to promote assistance for residents impacted by storm water flows.

Sandbags are available for purchase at the LOCSD office 2122 9th Street Suite 110 during Lobby Hours only. The sandbags are sold in bundles of 10 for $4.50. Bring exact change or a local check.  Limit of 2 bundles per resident. 

The LOCSD provides free sand on a self-service basis for sandbags at the LOCSD Utilities Water Yard at 8th Street and El Moro Avenue.  

Residents are encouraged to take proactive prevention measures and should be aware of any possible flooding areas located in the vicinity of their property. 
Call the Utilities Department at (805)528-9376 for further questions.

The County of San Luis Obispo has a rainfall, stream and reservoir web page.  For recent totals, click here.

What is an Illicit Discharge?

Illicit discharges are generally any discharge into a storm drain system this is not composed entirely of stormwater. The exceptions include water from fire fighting activities and discharges from facilities already under an NPDES permit. Illicit discharges are a problem because, unlike wastewater which flows to a wastewater treatment plant, stormwater generally flows to waterways without any additional treatment. Illicit discharges often include pathogens, nutrients, surfactants, and various toxic pollutants.
If you see water running down the street and there are no firefighting or water operations activities going on in the immediate area, please report it to the LOCSD main office at 805-528-9370.   

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 The Los Osos Community Services District is a member of the Central Coast Partners for Water Quality. The Central Coast Partners for Water Quality (or Partners) is a group of communities that convene to discuss, develop, and implement region-wide approaches for municipal stormwater programs for the protection of our rivers, creeks, bays, and ocean.  The goal of the Partners is to implement municipal stormwater programs consistent with state regulations.  The Partners provide an opportunity for intergovernmental coordination when implementing consistent public education campaigns and other municipal stormwater program components.  


Downloadable Documents:

LOCSD Storm Water Management Plan (SWMP)Prevent Taxoplamsa GondiiYour Horses and Stormwater


Additonal Resources



California Stormwater Quality Association 

California Strategy to Optimize Resource Management of Storm Water (STORMS)

More on Stormwater from the USEPA

Integrated Waste Management Authority of San Luis Obispo County (IWMA)

Link to ECO SLO (Environmental Center of San Luis Obispo)

Link to MBNEP (Morro Bay National Estuary Program)

National Geographic's Strange Days on Planet Earth Smart Plastics Guide

Safe Applications of Pesticides for Home and Garden





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