Water Quality Control Policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS) Policy
Adopted OWTS Policy on April 18, 2023
Board Adopted (Final) Documents: * Board Resolution (April 18, 2023)
Approved by OAL on September 26, 2023 * 2023 Board Adopted OWTS Policy (April 18, 2023) * Staff Report (April 18, 2023)
Map Tool
- State Water Board Public Map Tool: 2023 adopted OWTS Policy, Attachment 2 Impaired Areas
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- OWTS Policy: Public Fact Sheet Summary
Onsite Wastewater Treatment Systems Policy
- Accessory Dwelling Unit Permitting Guidelines Onsite Wastewater Treatment
- Local Agency Reporting of Groundwater Monitoring Data
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- Water Quality Control Policy for Siting, Design, Operation and Maintenance
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OWTS Policy General Information
The State Water Board adopted the Water Quality Control Policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) in June of 2012 and renewed its conditional waiver in April of 2018, for the first renewal and in April 2023 for the second renewal. Below are the 2018 and 2012 Policy and resolutions.
OWTS Policy Update, April, 2018
Board Adopted (Final) Documents: * Board Resolution No. 2018-0019 * 2018 Board Adopted OWTS Policy * Staff Report
Board Adopted Policy,June, 2012
- Board Resolution No. 2012-0032
- 2012 Board Adopted OWTS Policy
- Summary of the 2012 Board Adopted OWTS Policy
- OWTS Policy -Substitute Environmental Document.
OWTS Policy Documents and Recordings
- OWTS Policy Renewal Adoption, Recording, April 18, 2023
-
Staff Workshop Recording, October 4, 2022
- OWTS Policy Renewal Adoption, Recording, April 17, 2018
For Information or requests regarding this Policy, please email DWQ-WDR@Waterboards.ca.gov
Historical Information
For Information or requests regarding this Policy, please email DWQ-WDR@Waterboards.ca.gov
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Waste Discharge Requirements Program Contact Information Report an Environmental Concern (Page last updated 04/17/2025)
Septic - OWTS Resources
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