Selected Drinking Water Program Publications
Approved Backflow Prevention Assemblies
Prior to July 1, 2024, title 17 of the California Code of Regulations required backflow prevention assemblies, also known as backflow prevention devices, to be laboratory and field tested by an organization which had demonstrated its competency to the Division of Drinking Water. On July 1, 2024, the Cross Connection Control Policy Handbook (CCCPH) came into effect which updated the cross-connection control and backflow prevention standards for public water systems. As part of the CCCPH coming into effect the title 17 regulations related to cross-connection control and backflow prevention were repealed.
The CCCPH includes new standards for which backflow prevention assemblies must comply with in order to be used as part of a public water system. Organizations which provide the necessary laboratory and field evaluation tests which meet the CCCPH standards can be found on the Cross-Connection Control Policy Handbook (CCCPH) | State Water Resources Control Board. For any outstanding questions you may email backflow@waterboards.ca.gov.
Waterworks Standards
- Letter to Water Systems: Separation of Water Mains and Non-Potable Pipelines - Requests for Alternatives to the Waterworks Standards
- Waterworks Standards Main Separation Alternative Request Checklist (MS Word)
Capacity Development
- Triennial Capacity Development Report to the Governor (2019-2022)
- Annual Capacity Development Report to USEPA
- FY 2018-2019
- FY 2020-2021
- Capacity Development Strategy (2000)
- Capacity Development Strategy - Addendum FYS 2019-21
Capacity Development Reports for prior years are available on request to: Karen Nishimoto at Karen.Nishimoto@Waterboards.ca.gov
Drinking Water Program Annual Compliance Report
- 2024 Reporting Year
- 2023 Reporting Year
- 2022 Reporting Year
- 2021 Reporting Year
- 2020 Reporting Year
- 2019 Reporting Year
- 2018 Reporting Year
Annual Compliance Reports for prior years are available on request to: DDW Quality Assurance Section at DDW-QAS@waterboards.ca.gov
Cryptosporidium
Extremely Impaired Sources
A revised Process Memo 97-005-R2020 has been issued by the DDW along with a User Guide which is the result of a collaborative effort and is produced as a public service by the Coalition for Environmental Protection Restoration and Development. Not every circumstance can be covered by written guidance. This User Guide is designed to provide a starting point and common frame of reference to help applicants and reviewers alike navigate the 97-005 permit process effectively. You are encouraged to be familiar with both documents.
- Signed DDW Cover Memo (PDF)
- Guidance for Direct Domestic Use of Extremely Impaired Sources: Process Memorandum 97-005-R2020 (PDF)
- Process Memo 97-005 User Guide (PDF)
- Process Memo 97-005 User Guide Appendices A-H (PDF)
Fluoridation
Point of Use Treatment
Recreational Use of Drinking Water Reservoirs
Safe Drinking Water Plan
- Safe Drinking Water Plan for California (2015)
- Drinking Water into the 21st Century - Safe Drinking Water Plan for CA (PDF, 25.9MB) - January 1993 (487 pages)
Technologies
- Alternative Filtration Technology (AFT) Report (2001) (PDF)
- AFT Summary reports (June 2018)
- Water Treatment Technology Approval Process for Public Water System (PDF) - January 16, 2002
Others
- Senate Bill X2 1 - Report to the Legislature (2011) (PDF)
- Drinking Water Program Law Book
- "Write-On" Software & Libraries for Laboratories Submitting Analytical Data
