"Peak Dry Weather Design Flow" means the arithmetic mean of the maximum peak flow rates sustained over some period of time (for example three hours) during the maximum 24-hour dry weather period. Dry weather period is defined as periods of little or no rainfall.
Cal. Code Regs. Tit. 22, § 60301.660
Note: Authority cited: Section 13521, Water Code. Reference: Sections 13520 and 13521, Water Code.