Drinking Water Programs
The Division of Drinking Water (DDW) regulates public drinking water systems.
- NEW! Adoption of 2023 Division of Drinking Water Regulatory Priorities.
- NEW! On February 16, 2023, the Division of Drinking Water proposed revised notification and response levels for manganese of 20 parts per billion (ppb) and 200 ppb, respectively, based on toxicological endpoints.
- NEW! Drought & Conservation Reporting Webpage is Available
- NEW! Notice of Regulatory Requirements for Reporting Drinking Water Monitoring Sample Results
- Notice of Public Hearing and Public Comment Period for Cross-Connection Control Policy Handbook.
- The Division of Drinking Water has established a notification and response level of 3 parts per trillion (ppt) and 20 ppt, respectively, for perfluorohexane sulfonic acid (PFHxS).
- Notice of Availability of Acute Notification Level Recommendations for Cyanotoxins in Drinking Water
- Prepublication Federal Register Notice on Lifetime Drinking Water Health Advisories for Four Perfluoroalkyl Substances (PFAS): Perfluorooctanoic Acid (PFOA, Perfluorooctane Sulfonate (PFOS), Hexafluoropropylene Oxide (HFPO) Dimer Acid and its Ammonium Salt [“GenX chemicals”], and Perfluorobutane Sulfonic Acid and its Potassium Salt (PFBS)
- The Division of Drinking Water has initiated the process of developing revised notification and response levels for manganese.
- Notice of Public Workshop and Opportunity for Public Comment on Hexavalent Chromium MCL Administrative Draft.
- Lead and Copper Rule Revisions Lead Service Line Inventory Frequently Asked Questions
- Notice of Availability of Notification Level (NL) Recommendation for Perfluorohexane Sulfonic Acid (PFHxS) in Drinking Water (The peer-reviewed candidate studies for the derivation the NL recommendation can be found in the references section of the document.)
- Manganese Secondary MCL Exceedance Public Notice Templates are now available
- Perchlorate Detection Limit for Purposes of Reporting (DLR) approved; regulation takes effect July 1, 2021
- Revised Total Coliform Rule approved; Rule to take effect July 1, 2021
- A new Water System Partnerships Map and other website updates are now available through SAFER.
- Notice of Public Workshop and Opportunity for Public Comment for the Addendum to A Framework for Regulating Direct Potable Reuse in California Video recording of the Workshop is available.
- 2020 EAR now available for public water system annual reporting
- The Division of Drinking Water has established a notification and response level of 0.5 parts per billion and 5 parts per billion, respectively, for perfluorobutane sulfonic acid (PFBS)
- 2020 Consumer Confidence Reports (CCRs) Preparation Documents Now Available
- The Division of Drinking Water has initiated the development of notification and response levels for four cyanotoxins: microcystins, cylindrospermopsin, anatoxin-a, and saxitoxin. DDW made a formal request for recommendations to the Office of Environmental Health Hazard Assessment (OEHHA) on February 4, 2021.
- Drinking water quality impacts from North Complex fires found to be minimal
- Survey results show COVID-19 financial impact on water systems, customers
- The Division of Drinking Water has initiated the development of notification and response levels for perfluorobutane sulfonic acid (PFBS)
- Notice of Availability of Notification Level (NL) Recommendation for Perfluorobutane Sulfonic Acid in Drinking Water (The peer-reviewed candidate studies for the derivation the NL recommendation can be found in the references section of the document.)
- COVID-19 Survey Results– Water system financial impact and household water bill debt accumulation
- EPA posts the Public Safety Power Shutoff (PSPS) Standard Operating Procedure (SOP) template for consideration by public water systems.
- General Order Requiring Monitoring for PFAS in Drinking Water Sources
- 2019 Annual Compliance Report for Public Water Systems and 2019 Annual Compliance Report Dataset
- Public Safety Power Shutoff and Wildfire Info
- Drinking Water Sample Collection for PER and POLYFLUORINATED ALKYL SUBSTANCES (PFAS) Sampling Guidance REVISED May 2020
- Adoption of Policy Will Set Priorities and Guide Safe and Affordable Drinking Water Fund For Next Decade
- Revised Notice for Proposed Rulemaking: PERCHLORATE DETECTION LIMIT FOR PURPOSES OF REPORTING (DLR) (SBDDW-20-001)
- Revised Notice for White Paper Discussion on Economic Feasibility Analysis in Consideration of a Hexavalent Chromium MCL
- COVID-19 Drinking Water web page (4/7/20)
- Notice of Opportunity for Public Comment, Public Workshop, and Board Hearing: Proposed Definition of 'Microplastics in Drinking Water.'
- Guidance for Residential Water Customers and Water Systems During COVID-19 State of Emergency (04/1/2020)
Here is a map of FOB districts and office contact information (PDF).
The FOBs are responsible for the enforcement of the federal and California Safe Drinking Water Acts (SDWAs) and the regulatory oversight of ~7,500 public water systems to assure the delivery of safe drinking water to all Californians. In this capacity, FOB staff perform field inspections, issue operating permits, review plans and specifications for new facilities, take enforcement actions for non-compliance with laws and regulations, review water quality monitoring results, and support and promote water system security. In addition, FOB staff are involved in funding infrastructure improvements, conducting source water assessments, evaluating projects utilizing recycled treated wastewater, and promoting and assisting public water systems in drought preparation and water conservation.
FOB staff work with their colleagues in the Waterboards and with the US Environmental Protection Agency (EPA) as well as a wide variety of other parties interested in the protection of drinking water supplies. FOB staff work closely with staff of the Division of Financial Assistance on funding for public water systems.
On the local level, FOB staff work with county health departments, planning departments, and boards of supervisors. Primacy has been delegated to certain county health departments for regulatory oversight of small water systems, and FOB staff provides oversight, technical assistance, and training for the local primacy agency personnel.
The Program Management Branch consists of the Quality Assurance Section, the Environmental Laboratory Accreditation Program Section, and the Technical Operations Section.
The Quality Assurance Section
The Quality Assurance Section was formed within the Program Management Branch in 2017 to ensure the integrity and validity of the data taken into drinking water data management systems, and to establish procedures to ensure that the data received is valid, legally defensible, and meets expected levels of precision and accuracy. This role includes verification and recommendation of the use of specific analytical methods for drinking water analyses for compliance under the Safe Drinking Water Act.
The Quality Assurance Section (QAS) supports DDW FOB and LPA compliance determinations and enforcement actions, which are based upon water quality data and information received from laboratories and public water systems. In addition to Water Quality, QAS leads the Electronic Annual Report (EAR) database development, operations, and maintenance in collaboration with State Agencies and Water Systems. The data collected from water systems statewide is used to generate information for enforcement, field staff status updates, regulatory analysis, legislative decisions, and a variety of research applications. QAS is also responsible for preparation of reports to USEPA, other agencies and the public; development of Quality Assurance Programs for DDW, development of performance measures documenting program activities; resiliency of water systems in response to disasters and emergencies; and the development of technical, managerial and financial capacity of public water systems. The Section also coordinates the Drinking Water Source Assessment and Protection (DWSAP) Program and assists the FOBs and LPAs in implementing source water assessment and protection measures.
The Quality Assurance Section administers its programs through the following units:
The Program Liaison Unit (PLU) works in conjunction with the DDW-FOB and Local Primacy Agencies (LPAs) to assist in carrying out an efficient and effective regulatory program in order to protect the health of all Californians.
The PLU is responsible for:
- Ensuring that the regulatory primacy requirements that have been delegated to the local primacy agencies (LPAs) through the Local Primacy Delegation Agreement (LPDA) are being met at all times. Local LPA contact information. Program Liaison Unit staff supporting LPAs. Local LPA contact information.
- Performing USEPA primacy reporting requirements
- Developing and maintaining the Human Right to Water Portal and program
- Maintaining the Lead Sampling in Drinking Water in California Schools program and website
The Data Management Unit collects, compiles and evaluates water quality analytical results submitted by ELAP accredited laboratories for public water system compliance with the California Safe Drinking Water Act. The Data Management Unit ensures the accuracy and completeness of this data and other information reported by public water systems, which is made available to USEPA to meet State Primacy reporting requirements, and to stakeholders and the public. These responsibilities include managing and tracking public water system compliance with the California Safe Drinking Water Act and ensuring that water quality data are valid, legally defensible, and meets expected levels of precision and accuracy.
The Water Resiliency Unit (WRU) supports and assists DDW and California's water systems with security, preparedness, and emergency response concerns in effort to increase water system resiliency in the face of all-hazards. Earthquakes, Terrorism, Wildfires, Debris flows, Flooding, Accidents, Sabotage, Tsunami, and Cyber-attacks are a few of the natural and man-caused hazards that the Water Sector (one of the 16 Critical Infrastructures) faces regularly. The Water Sector is acutely aware of the vulnerabilities of drinking water systems to these hazards and the imperative to increase and maintain their resilience. The enhancement of security and the ability of water systems to prevent, prepare for, respond to, and recover from all-hazards is key to maintaining a reliable and adequate supply and delivery of safe, clean, wholesome drinking water.
- Drinking Water Emergency Response Plan Guidelines
- Unsafe Water Notice Guidance
- State Water Board Climate Change Initiative
The Environmental Laboratory Accreditation Program Section
The Environmental Laboratory Accreditation Program (ELAP) provides evaluation and accreditation of environmental testing laboratories to ensure the quality of analytical data used for regulatory purposes to meet the requirements of the State's drinking water, wastewater, shellfish, food, and hazardous waste programs. The State agencies that monitor the environment use the analytical data from these accredited laboratories. ELAP-accredited laboratories have demonstrated capability to analyze environmental samples using approved methods.
Technical Operations Section
The Technical Operations Section supports the implementation of a successful drinking water program in California. It ensures the timely adoption of appropriate regulations and standards that provide a foundation for an effective overall regulatory program and protection of public health. The Technical Operations Section administers its programs through the following units. Click on a link for contact information.
The Residential Water Treatment Device Registration Unit is responsible for ensuring that residential water treatment devices sold for purifying water meet appropriate standards.
The Regulatory Development Unit develops regulations pertaining to drinking water and to recycled water, as it relates to drinking water. It also provides templates for public notification for water systems.
The Recycled Water Unit develops water recycling criteria and regulations, evaluates water recycling projects and makes recommendations to RWQCBs about public health implications, and maintains an Alternative Treatment Technology Report for recycled water.
The Treatment Technology Unit reviews and evaluates new treatment technologies or expansion of operations of existing treatment technologies in drinking water and recycled water applications, and assists FOB staff in assessing proposed treatment facilities. Please see more information on the process for approval of treatment technology.
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Information for Public Drinking Water Systems
Program Quick Links
- Consolidation Tools
- California Laboratory Intake Portal (CLIP)
- Contaminants in Drinking Water
- COVID-19 Drinking Water
- Cyanobacteria/Cyanotoxins in Drinking Water
- Consumer Confidence Reports (CCRs)
- DRINC Portal
- Drinking Water Program Reports and Publications
- Drinking Water Supply Service Area Lookup Tool
- Drinking Water Watch Database
- Electronic Annual Reports (EAR)
- Environmental Laboratory Accreditation Program (ELAP)
- Funding for Public Water Systems
- Human Right to Water
- Lead Sampling in CA Schools
- Lead Service Line Inventory
- Notification and Response Levels
- Operator Certification - Drinking Water
- PFAS: Per- and Polyfluoroalkyl Substances
- Public Water System Monitoring Schedules
- Public Safety Power Shutoff and Wildfire Info
- Residential Water Treatment Devices
- Regulated and Unregulated Contaminants
- Safe Drinking Water Plan for California
- SAFER Drinking Water
- Water Partnerships and Consolidation
- Water Quality Data
- Water Recycling
- Northern Pike Eradication Program: Evaluation of Lake Davis Water Quality
- SWRCB and CDPH Nitrate Treatment Technology Workshop (September 2013)
- Governor's Drinking Water Stakeholder Group
- Department of Public Health's Regulation of Bottled, Vended and Hauled Water
- Office of Environmental Health Hazard Assessment-Public Health Goals (PHG)
- SWRCB's Information Pertinent to Private Domestic Well Water Quality
- Transfer of the Drinking Water Program (now DDW) from CDPH to SWRCB, July 1, 2014