Why is a baseline used in savings calculations?

• A. To forecast future rainfall.
• B. To establish a reference point for measuring actual water savings resulting from a program.
• C. To determine the color of irrigation lines.
• D. To set equipment warranty.

Answer: (B)

Baseline provides a reference point to measure actual water savings from a program. It represents what water use would have been without the program—the normal or pre-intervention usage. By comparing how much water is used after the program to this reference, you can quantify the savings as the difference attributable to the efficiency measures. This approach helps control for factors that influence water use beyond the program, like weather, seasonality, or changes in demand, so the savings reflect the program’s true impact. The baseline can come from historical water data, a modeled forecast, or a control scenario. The other options don’t fit because forecasting rainfall, choosing irrigation line colors, or setting warranties do not establish or measure the amount of water saved due to an efficiency program.