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

Proposed OWTS Policy renewal documents for consideration of adoption released April 4, 2023

Track changes from “Author” reflect proposed changes circulated for public comments on September 16, 2022. Track changes from “WDR” reflect proposed changes in response to comments after the end of the public comment period on November 1, 2022.

OWTS Policy Ex Parte Disclosures

  • March 24, 2023, The Gualco Group, Inc, Board Vice Chair Dorene D’Adamo, Board Member Laurel Firestone, Board Member Sean Maguire, and Board Member Nichole Morgan Communication Ex Parte Form
  • February 28, 2023, The Gualco Group, Inc, Infiltrator Water Technologies, Board Vice Chair Dorene D’Adamo and Board Member Laurel Firestone Communication Ex Parte Form
  • January 9, 2023, The Gualco Group, Inc, Infiltrator Water Technologies, and Board Member Nichole Morgan Communication Ex Parte Form
  • January 6, 2023, The Gualco Group, Inc, Infiltrator Water Technologies, and Board Member Sean Maguire Communication Ex Parte Form
  • October 31, 2022, California Coastkeepers Alliance and State Water Board Vice Chair Dorene D’Adamo Communication Ex Parte Form

OWTS Policy Renewal Staff Workshop October 4, 2022

Draft OWTS Policy renewal documents for public comment released September 16, 2022

OWTS Policy Renewal Public Notice August 17, 2022

OWTS Policy Update, April, 2018

Board Adopted (Final) Documents:

Board Adopted Policy

Map Tool

  • Coming Soon - State Water Board public map tool of the adopted 2023 OWTS Policy, Attachment 2 impaired areas

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

Background

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

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