Regulatory Aspects of Direct Potable Reuse in California

This paper, prepared for the National Water Research Institute, discusses the growing water demand in California and the need to implement new strategies to satisfy it, with a focus on direct potable use of water. The purpose of this paper is to identify issues that would need to be addressed by regulatory agencies and utilities in California interested in pursuing direct potable reuse as a viable option in the future.

The epidemiological and toxicological health effects of potable water are examined, and techniques on how to recycle water and make it directly potable are discussed. According to the report, the assessment of the safety of using recycled water for direct potable reuse must consider several factors, such as microbial and chemical quality of the product water, treatment performance and reliability, multiple barriers, monitoring capability, and system operation and management. For direct potable reuse to proceed in California, these factors (and others) present issues that would need to be resolved by regulatory agencies during the development of regulations, policies, and/or guidelines.

The principal state agencies involved in regulating water recycling in California are the California Department of Public Health (CDPH), State Water Resources Control Board (SWRCB), and Regional Water Quality Control Boards (RWQCBs).





Publication Date: April 2010

Author or Affiliated User:

  • James Crook

Related Organizations:

  • National Water Research Institute


Resource Category:

Resource Types:

  • Assessment

States Affected:


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