Water agencies across the San Diego region are expected to see rate increases for 2019 that are “among the smallest in the past 15 years,” according to the San Diego County Water Authority. Rates charged to the Water Authority’s 24 member agencies would increase by 0.9 percent for treated water and 2.9 percent for untreated water in calendar year 2019, according to a proposal to be presented to the Water Authority’s Board of Directors on May 24.