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�A -35 DRAFT URBAN WATER MANAGEMENT PLAN .0% 55% ITT B 25% 20% 15% 6 x 10% o% moo Figure 3.2 Water Supply Deficit Scenarios 2010 i—N0 PC50n — WIM1 C" G. — `+—WMO Cmw bw-ROCYUM 3.3 Water Shortage Contingency Plan Currently, Redwood City's sole water supplier is the SFPUC through the Hetch Hetchy regional water system. Like other water delivery systems, Hetch Hetchy is vulnerable to periodic, short-term outages. One shortage scenario would occur from catastrophic interruption (e.g., earthquake). Because Hetch Hetchy water is not filtered, it is subject to strict water standards set by the state Department of Health Services (DHS). Weather and/or other events can increase turbidity levels beyond standards requiring the Hetch Hetchy supply to be shut off until levels drop to within standards. Hetch Hetchy supply outages could last a week or longer. The City is also vulnerable to local failures in its water distribution system. Assembly Bill 1823, the Wholesale Regional Water System Security and Reliability Act, was passed by the California Legislature on August 28, 2002, and subsequently signed into law by Governor Davis. The Act adds and repeals Division 20.5 to the Water Code, relating to regional water systems, including: Adopt a plan to fix the system The SFPUC, as owner and operator of the Hetch Hetchy regional water system, on or before February 1, 2003 shall adopt a capital improvement program to restore and improve the regional water system and help avoid seismic - related catastrophes. A copy of the program, including a schedule for completion, shall be submitted to DHS. The program shall contain a financing plan. Section 73502(a). Emergency response The SFPUC shall prepare an emergency response plan describing how water service will be restored in the event of a catastrophic 25 tY 2010 i—N0 PC50n — WIM1 C" G. — `+—WMO Cmw bw-ROCYUM 3.3 Water Shortage Contingency Plan Currently, Redwood City's sole water supplier is the SFPUC through the Hetch Hetchy regional water system. Like other water delivery systems, Hetch Hetchy is vulnerable to periodic, short-term outages. One shortage scenario would occur from catastrophic interruption (e.g., earthquake). Because Hetch Hetchy water is not filtered, it is subject to strict water standards set by the state Department of Health Services (DHS). Weather and/or other events can increase turbidity levels beyond standards requiring the Hetch Hetchy supply to be shut off until levels drop to within standards. Hetch Hetchy supply outages could last a week or longer. The City is also vulnerable to local failures in its water distribution system. Assembly Bill 1823, the Wholesale Regional Water System Security and Reliability Act, was passed by the California Legislature on August 28, 2002, and subsequently signed into law by Governor Davis. The Act adds and repeals Division 20.5 to the Water Code, relating to regional water systems, including: Adopt a plan to fix the system The SFPUC, as owner and operator of the Hetch Hetchy regional water system, on or before February 1, 2003 shall adopt a capital improvement program to restore and improve the regional water system and help avoid seismic - related catastrophes. A copy of the program, including a schedule for completion, shall be submitted to DHS. The program shall contain a financing plan. Section 73502(a). Emergency response The SFPUC shall prepare an emergency response plan describing how water service will be restored in the event of a catastrophic 25