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COVID-19 Updates: Get the latest public information related to coronavirus disease 2019 (COVID-19) at

Public Works will re-open our front counter to the public on July 6 and start providing some modified services.  Our hours will be 8 – 5, with closure from 12 – 1:30 for sanitation. Masks are mandatory in our building, and we ask that you adhere to physical distancing protocol. We will have limited services at our front counter and will not be accepting drop in meetings.  Please contact 805-781-5252 to make an appointment with staff.  Bus passes can be purchased at the Kiosk on the corner of Osos and Palm or by phone via Follow us on Twitter @SLOCountyPWD for the latest updates.

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Los Osos Wastewater Project

Click here to view the Los Osos Recycling Facility webpage.


To evaluate and develop a wastewater treatment system for Los Osos, in cooperation with the community water purveyors, to solve the Level III water resource shortage and groundwater pollution, in an environmentally sustainable and cost effective manner, while respecting community preferences and promoting participatory government, and addressing individual affordability challenges to the greatest extent possible.

Project Location

View the Public Works GIS map of sewer lateral and septic tank locations here.

Project Contacts

Bi-weekly office hours in Los Osos were completed on March 16, 2017. For more information please contact Rosalyn Piza via email or phone: (805) 788-2759, or stop by the Public Works Department office in downtown San Luis Obispo located at 976 Osos Street, Room 206

For Odor Complaints please use this form.

Contact Public Works via web form, email, or call us at (805) 781-5252.