THE STORY

Serving an average of 15 million gallons per day—with peak summer demand exceeding 20 million gallons—the Vallejo Water Division operates a complex network of treatment facilities, pumping stations, and distribution infrastructure essential to public health and safety. Guided by a commitment to environmental stewardship and operational reliability, the Water Division continually looks for ways to improve system performance while managing energy use and long-term costs.

THE GOAL

Energy consumption represents a significant and ongoing cost for water utilities, particularly for systems with multiple pumping and treatment facilities operating around the clock. The Vallejo Water Division sought a clear understanding of how energy was being used across its system—and where improvements could reduce costs without compromising quality, reliability, or operational flexibility.

THE SOLUTION AND RESULTS

Franklin Energy conducted a comprehensive series of energy audits across the facilities, including treatment plants and more than 20 individual pumping sites. The team sub-metered equipment, analyzed SCADA system data, and evaluated approximately 30 electric meters and two natural gas meters to develop facility-specific audit reports.

With a focus on reducing the energy intensity of existing infrastructure, the team performed engineering analyses on a per-gallon basis to clearly connect energy use to water delivery performance and identify the most impactful improvements. Ultimately, the study identified 43 potential measures spaning retro-commissioning, energy efficiency, load management, demand response, and on-site generation.