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While most services are available online or via the telephone, limited Tax Collector services are now also available in-person. Please email [email protected] or call (805) 781-5831 to make an appointment. Walk-in service is also available but may be subject to delays.

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Los Osos Waste Treatment

Full Name

Los Osos Waste Treatment

Tax Bill Abbreviation



Special Assessment

Contact Information

(800) 676-7516


Los Osos Waste Water Project was developed 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.

This charge is to repay debt from the original Los Osos Community Services District.