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:

Approved by OAL on September 26, 2023

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More Information

Onsite Wastewater Treatment Systems Policy

  1. Accessory Dwelling Unit Permitting Guidelines Onsite Wastewater Treatment
  2. Local Agency Reporting of Groundwater Monitoring Data
  3. Local Agency Monitoring and Reporting Requirements
  4. Water Quality Control Policy for Siting, Design, Operation and Maintenance
  5. Commercial Food Service Wastewater Issues
  6. OWTS Policy Guidance Timeline Table
  7. LAMP Contact List

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 Adopted Policy, June, 2012

OWTS Policy Documents and Recordings

For Information or requests regarding this Policy, please email  DWQ-WDR@Waterboards.ca.gov

For Information or requests regarding this Policy, please email  DWQ-WDR@Waterboards.ca.gov

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