The Hydrologic Region Map is a tool complimentary to the California Public Utilities Commission's Water-Energy Calculator. Use this map to determine required information to enter into the calculator. Together, these tools calculate embedded energy saved by water efficiency.
Follow these steps to use the map:
The Water-Energy Calculator spreadsheet can be found on the California Public Utility Commission’s website.
This list helps determine if a water agency is an Investor Owned Utility (IOU) or non-Investor Owned Utility (non-IOU). The information is required for the Water-Energy Calculator. If your water agency appears on the list, it is an IOU. If it does not appear on the list, it is most likely a non-IOU.
Visit the California Water Association's list of IOU Water Agencies