SJW Infrastructure Improvement Progressing at Cambrian Tank Replacement Project

New tanks will provide 16 million gallons of potable water storage

San Jose, Calif. - May 29, 2025 - San Jose Water (“SJW” or “the Company”), a wholly owned subsidiary of H2O America (NASDAQ: HTO), has made meaningful progress on its Cambrian Tank Replacement project, a major investment in the long-term reliability and seismic resilience of the Company’s water system. SJW invests about $200 million each year to upgrade and modernize infrastructure and support the needs of the communities it serves. 

The Cambrian Station site previously relied on two earthen embankment reservoirs, originally constructed in 1890 and 1921. These aging reservoirs had reached the end of their useful life and no longer met current seismic standards, necessitating their replacement.

To modernize the site, SJW is constructing two prestressed concrete tanks, each with a capacity of 8 million gallons. Together, these tanks will provide 16 million gallons of potable water storage with enhanced seismic performance and improved operational reliability. The full Cambrian Station project remains on schedule for completion in September 2027. 

As part of a phased construction approach, one of the two original reservoirs has been demolished and removed to accommodate the first new tank. Site preparation and earthwork have been completed. Construction of the first tank is progressing well, with all walls and interior columns in place. The first two roof quadrants have been poured. The third is nearing completion, and the final quadrant is scheduled next. Once the roof is complete, the exterior finishes will begin. 

“There’s much work still ahead, but we’re getting closer to delivering this major upgrade for our customers,” said Tanya Moniz-Witten, President of San Jose Water. “The Cambrian Tanks served customers for well over a century. In fact, the first Cambrian reservoir was built the same year Yosemite National Park was established, a reminder of how long this site has been a cornerstone of our system. We’re eager to complete the new tanks, which will have a more resilient structure, a longer service life, lower maintenance requirements, and improved seismic stability for the next century.”

Learn more about the Cambrian Tank Replacement project 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: sjwater.com.