San Diego County Water Authority officials are in the midst of mapping out a long-term water supply plan that’s expected to look quite different from the document they drew up just five years ago. Some environmentalists worry those plans rely too much on energy-intensive sources like desalination.

Water officials say the region’s forecast for the year 2040 relies less on imported water from Los Angeles-based Metropolitan Water District of Southern California and more on local supplies that tap into recycling and possibly desalination.