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NOTICE OF PROPOSED RULEMAKING: Onsite Treatment and Reuse of Nonpotable Water

State Water Board
ANNOUNCEMENTS
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From the State Water Resources Control Board:

The State Board proposes to amend California Code of Regulations, Title 22, Division 4 for the purpose of adding Chapter 3.5 to provide uniform statewide criteria for onsite treated nonpotable water systems (OTNWS). The adoption of the proposed regulations will establish risk-based water quality standards for the onsite treatment and reuse of nonpotable water for nonpotable end uses in multifamily residential, commercial, and mixed-use buildings.

Untreated graywater systems that are used exclusively for subsurface irrigation and untreated rainwater systems that are used exclusively for surface, sub-surface, or drip irrigations, which are regulated by Chapter 15 and Chapter 16 of the California Plumbing Code (Part 5 of Title 24 California Code of Regulations), will not be addressed by these proposed regulations.

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State Water Board
State Water Board
The mission of the State and Regional Water Boards is to preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.