Measurement and evaluation (M&E) of water savings are fundamental to understanding the effectiveness of urban water conservation programs. Measurement involves the systematic collection of data on water usage, program participation, and external factors influencing consumption. Evaluation interprets these data to assess whether conservation initiatives achieve their intended objectives.
Yes, the M&E Guidebook is big. It’s technical. It can feel overwhelming. Why? Because measuring water savings isn’t straightforward. You’re trying to quantify something invisible: the water that would have been used if your program didn’t exist.
That takes data, methods, and math. But here’s the good news: you don’t need to be a statistician to get value from M&E. The guidebook exists so you can point to credible methods and back up your work with confidence.
Data & Analytics Tool Series: Measurement & Evaluation Resources
Why It Matters: An accessible introduction to why measurement and evaluation (M&E) is worth the investment. Explains how M&E helps agencies prove programs work, use resources wisely, tell a compelling story with data, and compete for grant funding. Includes a plain-language breakdown of the value M&E brings to staff in their day-to-day work.
Understanding Methods for Estimating Water Savings: A quick-reference matrix summarizing the most common approaches to measuring water savings, from engineering-based deemed savings estimates to advanced panel regression models. For each method, the matrix outlines minimum data requirements, recommended additional data, and key advantages and limitations to help practitioners select the right approach for their context.
Unlock More Grant Dollars with Credible Water Savings Measurement & Evaluation: A practical guide connecting M&E practices to grant competitiveness. Explains what state and federal funders — including USBR and DWR — look for in applications, and maps specific funder requirements to relevant chapters in the CalWEP M&E Guidebook.
Applying the M&E Guidebook: Putting Water Savings Evaluations into Practice: A scenario-based resource showing how to apply the M&E Guidebook to real-world programs. Walks through practical examples, including how to retroactively evaluate a completed toilet replacement program, with step-by-step guidance on data inventory, method selection, and analysis approach.
