Sacramento County has finished the largest construction project in the history of its water agency, wrapping up a $160 million overhaul of the Arden area's water system after 10 years of work. The Arden Service Area Pipe and Meter Installation Project installed roughly 38 miles of new water distribution pipelines and more than 3,000 new water meters, closing out flat-rate billing in what county officials say was the last unmetered pocket of unincorporated Sacramento County left in the state.
According to Sacramento County, the Arden neighborhood represented the final section of California still operating without water meters, a distinction that had persisted long after most communities converted decades earlier. The shift traces back to state law: California Assembly Bill 2572, signed in September 2004 under Governor Arnold Schwarzenegger, mandated that all urban water suppliers install meters on municipal and industrial service connections, setting a January 1, 2025 deadline, per California Legislative Information. Arden's flat-rate system had outlasted that statewide push by more than a year before the county finally closed the gap.
The infrastructure being replaced was not just outdated on paper. The county reported that some of the distribution pipelines pulled out of the ground during the project had been in service for nearly 85 years, originally laid during World War II. Those aging mains carried elevated risk of failure and chronic water loss, the kind of vulnerability that made the Arden system a priority even before the state's metering mandate forced the issue.
Rerouting Pipes Out of Backyards and Into Streets
The project did more than swap in meters. Engineering firm Domenichelli & Associates, which worked on the design, noted that crews abandoned old water mains that had been buried in private backyard easements for decades and relocated new 6- to 16-inch ductile iron and PVC pipelines into public street rights-of-way. That change matters for maintenance: backyard easements had long complicated routine repairs and utility access, forcing crews onto private property just to fix a leak.
Moving the lines into the street also boosted capacity for fire suppression, since the new pipes are wider than what they replaced. Sacramento County noted that the water agency partnered with the county's Department of Transportation to fully repave affected residential and arterial streets as each of the project's six phases wrapped up, with trenching work touching major corridors including Fair Oaks Boulevard, Watt Avenue, and Howe Avenue.
Federal Loan Helped Cover the Decade-Long Bill
Paying for a $160 million overhaul took more than local ratepayer dollars. In December 2021, the U.S. Environmental Protection Agency announced an $81 million low-interest loan under the Water Infrastructure Finance and Innovation Act to support the Sacramento County Water Agency's Arden upgrades, a financing tool designed to help utilities modernize drinking water systems without piling costs onto customers all at once. The EPA also projected at the time that replacing leaky mains and moving Arden residents onto metered billing would cut local annual water usage by 17 percent, a conservation gain the agency has tied directly to volumetric metering combined with reduced pipe leakage.
One person threaded through all 10 years of the effort was SCWA Project Manager Helen Rocha, who led the Arden project across its full six phases from inception to completion. According to the county, that work included running public meetings and doing individual outreach to property owners who needed to understand what backyard pipeline abandonments and service disruptions would mean for their homes over the life of the project.
Industry Awards Piled Up Along the Way
The project also picked up recognition from engineers well before it finished. Sacramento County reported that the Arden effort earned four American Society of Civil Engineers awards during its lifespan, culminating in the 2025 Sacramento Region Project of the Year award for Phase 3. Earlier individual phases had already collected local and statewide ASCE community improvement awards as the work progressed.
The completion also lands the Arden area squarely inside a new layer of state oversight. Under the State Water Resources Control Board's Making Conservation a California Way of Life regulations, which took effect in 2025, urban water suppliers must now measure metered usage to calculate customized urban water budgets, according to Somach Simmons & Dunn. Enforcement of those budgets begins in 2027, meaning Arden's newly metered homes will factor into efficiency targets the water agency now has to hit under state law.
How Arden residents' bills and water habits actually change now that flat-rate billing has ended for good remains an open question the county has not yet detailed publicly. With meters freshly installed on more than 3,000 properties, the shift from paying a flat fee to paying for exact volume used is likely to be the most immediate, tangible change local households notice from a project a decade in the making.
