It’s been 25 years since the San Diego County Water Authority decided to broadly diversify its supplies. The authority’s experiences dealing with the Metropolitan Water District of Southern California during a severe drought led officials to believe they urgently needed additional sources of water to avoid disaster in a future drought. This triggered a harsh response from the giant water wholesaler. Upset that its largest customer was publicly questioning MWD’s trustworthiness, MWD paid $400,000 to a public relations company for what The Los Angeles Times called a “clandestine effort to discredit San Diego County water leaders.”