A historic achievement for the San Diego region passed almost unnoticed when the San Diego County Water Authority’s board of directors adopted new wholesale water rates in late June. The rate-setting process highlighted how the Water Authority’s independent water supplies from the Colorado River are now both less expensive and more reliable than supplies from the Metropolitan Water District of Southern California. It’s an accomplishment that the region’s water officials started working toward two decades ago, and one that will bear fruit for decades to come.