Infrastructure upgrades that support reliable water service for 225,000 customers 

San Jose, Calif. — February 26, 2026 — San Jose Water (“SJW” or “the Company”), a wholly owned subsidiary of H2O America (NASDAQ: HTO), has placed the first of two planned 8‑million‑gallon prestressed concrete water storage tanks into service at its Cambrian Station. This milestone follows recent approval from the State of California Division of Drinking Water. The second tank is currently under construction and planned for completion in 2027, at which point the site will provide 16 million gallons of modern, seismically resilient water storage capacity.

The new tanks replace two aging earthen embankment reservoirs – one 12.1 million gallons (built in 1890) and one 3.9 million gallons (built in 1921) – that have served the community for more than a century. Transitioning to prestressed concrete tanks marks a major upgrade in seismic performance, long‑term reliability, and operational flexibility. This project also strengthens system redundancy and provides a meaningful boost to fire‑flow capabilities. 

“Bringing the first of these new tanks online is an important step forward for the customers we serve,” said Tanya Moniz‑Witten, President of San Jose Water. “This project represents a significant investment in long‑term reliability, seismic resilience, and cost‑effective service for generations to come.”

The Cambrian Zone was the first pressurized water zone in the City of San Jose and today serves approximately 225,000 people across the North Valley, Las Plumas, Rosemary Gardens, Northside, Japantown, Rose Garden, and Downtown San Jose neighborhoods.

The Cambrian Reservoir Replacement Project remains on schedule, with the second tank planned for completion in 2027 and overall site work expected to conclude in September 2027. Learn more here. 

About San Jose Water
Founded in 1866, San Jose Water is a regulated private utility, and one of the largest and most technically sophisticated urban water systems in the United States. The company serves over one million people in the greater San Jose metropolitan area. San Jose Water is owned by H2O America, a publicly traded company listed on the NASDAQ Stock Market under the symbol HTO. H2O America also owns: Connecticut Water Company in Connecticut; Maine Water Company in Maine; and Texas Water Company in Texas. To learn more about San Jose Water, visit www.sjwater.com.