We agree with Cal-Am's Study that reducing or prohibiting the use of potable water for outdoor landscape irrigation during peak demand periods is a reasonable means of addressing short-term supply limitations. Unlike residential and commercial consumption or sanitary uses, outdoor landscape irrigation does not require potable water, and reclaimed and other forms of non-potable water are common substitutes. We conclude, therefore, that use of potable water for outdoor irrigation is not entitled to the high standard of reliability we require for residential and commercial consumption and sanitary uses. We observe, as well, that outdoor landscape irrigation may play a large role in bringing the system to maximum Daily Demand. (Footnote omitted.)

As American Water recognized in its capacity additions strategy . . . developing a program to implement a lower standard of availability for outdoor irrigation will require significant work with customers to address numerous issues. Because most residential and commercial customers do not have separately metered landscape irrigation, among the issues requiring resolution is creating an efficient and feasible means to timely initiate and enforce landscape irrigation prohibitions.31

28 RT at 1843, for example.

29 Exhibit 104 at 26.

30 D.09-07-021 at 155-156.

31 D.09-07-021 at 20-21.

32 Id. at 131 - 132.

33 Cal-Am has filed A.10-05-020 to implement proposed moratoria on new connections.

34 SWRCB Order 2009-0060, Attachment 1 at 64. A water year is calculated from October to September.

35 FEIR at 5-40.

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