San Jose Water became the first California Public Utilities Commission-regulated water utility in the state to deploy Advanced Metering Infrastructure at scale, and by the end of 2025 the results were already measurable: 53% of its meters were AMI-enabled, and in just the second half of 2025 alone, the system generated more than 46,000 automated leak alerts. That's a genuinely different trajectory than some other California municipal AMI programs have followed, and understanding why offers a useful case study in what smart metering can deliver when the underlying program is well-funded and methodically executed from the outset.
San Jose Water first filed its AMI application with the CPUC in December 2019, following a successful pilot program that demonstrated real customer benefits 24-hour access to usage data, early leak detection, and timely notification of unusual usage spikes. The CPUC formally approved the roughly $100 million investment in June 2022, structured as a four-year rollout that was later extended to a three-year installation timeline targeting full implementation by 2027, funded separately from the capital expenditures already built into San Jose Water's general rate case. Installation of the roughly 230,000 meters across the utility's service area covering San Jose, Cupertino, Campbell, Los Gatos, Monte Sereno, and Saratoga actually began in 2024, with the pace of installation accelerating considerably through 2025: from a reported 40% of meters installed by September 2025 to 53% AMI-enabled by year's end.
The centerpiece of the customer-facing side of this rollout is SJWaterHUB, the customer portal launched alongside the accelerated deployment, giving residential and business customers near-real-time consumption data, daily usage tracking, customizable high-use alerts, and early leak detection a genuine shift from the previous standard of learning about water usage only once every 60 days when a bill arrived. For customers whose meters have been converted, this means finding out about a running toilet or a broken irrigation valve within hours or days rather than potentially two months later, by which point a sustained leak can waste a genuinely significant volume of water and add real, unexpected cost to a water bill.
The 46,000 automated leak alerts generated in just the second half of 2025 represent something more significant than a headline statistic each alert represents a specific instance where a customer or the utility itself learned about a developing problem far earlier than the previous 60-day billing cycle would have allowed. San Jose Water has been explicit that this detection speed matters directly for the utility's broader water conservation goals: every leak caught early is water that doesn't need to be sourced, treated, and pumped from an increasingly constrained and expensive supply, a dynamic that matters considerably in a state where water scarcity remains a persistent planning concern regardless of any given year's rainfall.
San Jose Water has projected the AMI program will cut its annual carbon footprint by roughly 103 tons of CO2 equivalent, a reduction driven by two distinct mechanisms: water savings from faster leak detection, and decreased vehicle travel, since AMI eliminates the need for a truck to physically visit each of the utility's 230,000 meters for manual reading. That second factor is easy to overlook but genuinely significant at this scale a workforce that previously drove to every meter in the service territory on a recurring reading schedule can be redirected toward higher-value field work, like investigating the leak alerts the system now generates automatically, rather than routine, no-incident meter checks.
For a customer wondering whether their own account has been converted, the practical way to find out is simply checking whether SJWaterHUB access is available for their address customers with converted meters can register for the portal and immediately start seeing daily usage data, while customers still awaiting conversion continue receiving the traditional bimonthly reading and won't have portal access until their specific meter comes online. Given the accelerated pace of installation through 2025, San Jose Water customers who haven't yet been converted can reasonably expect their meter to come online sometime before the 2027 full-implementation target, though the utility hasn't published a granular, neighborhood-by-neighborhood installation schedule that would let an individual customer predict their exact conversion date in advance.
San Jose Water's experience stands in useful contrast to the City of San Diego's own AMI history, covered in more detail elsewhere on this site, where a citywide rollout suffered severe cost overruns, thousands of billing errors, and an eventual multi-year shutdown before a scaled-back relaunch. A few structural differences likely contributed to San Jose Water's smoother execution: as an investor-owned utility regulated directly by the CPUC rather than a municipal department, San Jose Water operated under a more structured regulatory approval and oversight process from the outset, with the CPUC and the state's Public Advocates Office directly touring the deployment in 2025 to review implementation. The utility also benefited from a genuine pilot phase before committing to full-scale deployment, and structured its rollout as a phased, multi-year installation rather than attempting a rapid citywide conversion the same kind of deliberate, incremental approach that tends to separate successful AMI programs from troubled ones regardless of which state or city is involved.
As with any utility rolling out granular, near-real-time usage monitoring, San Jose Water's AMI program has had to address genuine data security and privacy questions alongside the operational rollout itself. The CPUC and Public Advocates Office tour of the deployment in 2025 specifically included a review of data security practices, reflecting the reality that hourly household water usage data, while less sensitive than health or financial records, still reveals meaningful information about occupancy patterns and daily routines that customers reasonably expect to be protected. San Jose Water customers evaluating whether to actively use the SJWaterHUB portal's more detailed features should expect the same kind of standard utility data protection practices encrypted transmission, access controls, and limits on third-party data sharing that regulators increasingly expect as a baseline for this category of infrastructure, rather than a bespoke privacy framework unique to this specific program.
With full implementation targeted for 2027, San Jose Water still has a meaningful share of its 230,000-meter service territory to convert, and the utility's own reporting acknowledges this remains a multi-year effort rather than a completed project. The company has pointed to its experience as informative for sibling utilities under its parent company's broader operations Texas Water, under the same corporate umbrella, already has roughly 75% AMI penetration and has demonstrated the kind of automated high-usage and leak notifications San Jose customers are now beginning to receive as their own meters come online, while other affiliated utilities in Connecticut and Maine are still evaluating whether to pursue their own AMI deployments based partly on how San Jose's rollout continues to perform.
Frequently asked questions
By the end of 2025, approximately 53% of San Jose Water's roughly 230,000 meters were AMI-enabled, with full implementation targeted for 2027.
The CPUC approved approximately $100 million for the program in 2022, funded separately from San Jose Water's regular capital expenditure budget under its general rate case.
It's San Jose Water's customer portal, giving residential and business customers near-real-time water usage data, daily consumption tracking, customizable alerts, and early leak detection notifications.
More than 46,000 automated leak alerts were generated in just the second half of 2025 alone, reflecting how much faster the system detects developing problems compared to the previous 60-day billing cycle.
As a CPUC-regulated investor-owned utility, San Jose Water operated under structured regulatory oversight from the outset, ran a genuine pilot program before full deployment, and executed a phased, multi-year rollout rather than attempting a rapid citywide conversion.
Yes. San Jose Water projects roughly 103 tons of annual CO2 equivalent reduction, driven by both water savings from faster leak detection and decreased vehicle travel since meters no longer require in-person manual reading visits.
Related articles
Smart Utilities
