From Crushpad to Tap: How a Napa Startup Turned Winery Wastewater Into Certified Drinking Water

Every wine harvest leaves behind a problem winemakers rarely discuss in tasting rooms: thousands of gallons of wastewater used to rinse crushpads, hoses, tanks, and equipment, laden with organic load and increasingly subject to costly state regulation. A Napa-based startup says it has now solved that problem so thoroughly that the wastewater coming out the other end meets federal drinking water standards — a milestone independently verified at one of the country's most respected viticulture programs.

Revida Water announced it has converted winery wastewater into drinking water, verified by an independent lab against U.S. EPA standards, making it one of the first commercial companies to achieve that result with independent third-party verification. The achievement landed at a particularly consequential moment for California's wine industry, which is now navigating a sweeping new state mandate that has left more than 1,500 wineries facing an expensive and unwelcome choice.

A Regulatory Squeeze Years in the Making

The trigger behind Revida's commercial push is California's Water Resources Control Board Winery General Order, a regulation now requiring more than 1,500 California wineries to bring their wastewater handling into compliance. For most operators, that compliance has historically meant one of two unappealing paths: paying to haul wastewater offsite indefinitely, or building permanent on-site treatment infrastructure that can exceed $500,000 in capital costs — a sum well beyond what many mid-sized or family-owned wineries can absorb.

Revida's pitch is built to eliminate that binary entirely. Rather than asking wineries to buy and operate their own treatment infrastructure, the company designs, builds, and operates fully containerized water treatment systems delivered through a per-gallon service model with guaranteed performance, eliminating significant up-front capital expenditure and transferring all technology and performance risk to Revida itself. The company's vertical integration allows it to deploy solutions in weeks rather than the years typically required for traditional wastewater projects — a timeline difference that matters enormously to wineries facing regulatory deadlines tied to harvest seasons.

The UC Davis Proving Ground

Revida chose a credible and symbolically significant location to prove its technology: the Teaching and Research Winery operated by the Department of Viticulture and Enology at UC Davis, widely regarded as one of the most influential wine science programs in the country. The installation began just before the 2025 grape harvest and continues to operate today, treating up to 600 gallons per day of winery process water — the water used to clean the crushpad, hoses, tanks, and equipment during active production.

The system itself runs entirely on solar power, with a standard 110-volt outlet serving as backup — a detail that speaks directly to the off-grid, rapid-deployment design philosophy behind the company's containerized approach. A unit that doesn't require dedicated electrical infrastructure can be sited essentially anywhere on a working winery property without triggering additional construction costs or permitting delays.

"The Amazon Web Services of Wastewater Treatment"

Revida founder and CEO Ashish Shah has been explicit about the business model analogy driving the company's strategy.

That framing reflects a broader pattern playing out across infrastructure-heavy industries: complex, capital-intensive technical functions increasingly get outsourced to specialized service providers who absorb the operational and financial risk in exchange for a recurring usage-based fee. Just as cloud computing freed software companies from needing to own server farms, Revida's model is designed to free winery operators from needing in-house wastewater engineering expertise or seven-figure capital budgets.

Ben Montpetit, Ph.D., Department Chair and Professor of Viticulture and Enology at UC Davis, framed the university's participation as both a sustainability commitment and an educational one.

In separate reporting on the broader trend of drought-driven innovation in California agriculture, Montpetit elaborated on the practical realities facing the industry. He noted that testing new technology at a research winery comes more easily than deploying it at a winery operating under full commercial pressure, and that cost will likely be the deciding factor in how widely such technology gets adopted. "If you can be more cost-effective and efficient, that's going to be better for you," he said, adding that different water users have different needs, making flexible service options important.

Beyond Wine: A Dairy and Agriculture Play

Revida's ambitions extend well past the wine industry. According to founder Ashish Shah, the company's technology works particularly well on dairies where digesters have already been installed — positioning Revida to serve a second major California agricultural sector also facing mounting water and waste management pressure. Most dairy clients, Shah said, will likely want to use treated water for purposes like irrigation and animal misting initially, with some potentially moving toward drinking water reuse over time as comfort with the technology grows.

Shah has set an aggressive growth target for that segment: he hopes to have around 100 dairies using the process by the end of 2027. His urgency is tied directly to the broader water crisis facing California agriculture. "We're not going to wait around," Shah said, underscoring how seriously the company is treating the window of opportunity created by tightening state water regulations and persistent drought pressure across the state.

Commercially, Revida is now positioning its subscription service for mid-market California wineries, with deployments designed to treat between 1,000 and 1,000,000 gallons per day — a range broad enough to serve everything from a modest family winery to a large-scale commercial operation. The company says it is currently in discussions with winery operators, dairy processors, dairy farms, and agricultural facility operators across the United States, suggesting the UC Davis pilot is intended as a proof point for a multi-sector national expansion rather than a standalone wine-industry niche product.

Why This Matters Beyond One Winery

Revida's achievement sits at the intersection of two trends reshaping how industrial wastewater gets handled nationally: increasingly stringent state-level discharge regulation, and a shift toward service-based, capital-light infrastructure models that let resource-intensive industries access advanced technology without the burden of owning and operating it themselves. California's Winery General Order is forcing the issue for wine specifically, but similar dynamics are playing out across food and beverage processing, dairy operations, and other water-intensive agricultural sectors nationwide as states tighten oversight of industrial discharge.

The independent EPA-standard certification is the detail that elevates this from a promising pilot to a credible commercial claim. Wastewater treatment companies routinely claim impressive purification numbers; far fewer submit those results to independent laboratory verification against federal drinking water standards. That step is what separates a marketing claim from a milestone other companies, regulators, and potential customers can actually evaluate and trust.

Looking Ahead

Revida's UC Davis milestone arrives as California agriculture confronts a tightening vise of water scarcity, regulatory pressure, and rising compliance costs — conditions that are pushing the industry toward exactly the kind of outsourced, technology-driven solutions Revida is betting on. Whether the company can translate one successful pilot into the hundred-dairy, multi-sector footprint its founder envisions will depend on execution at commercial scale, something meaningfully harder than a single research winery installation. But the underlying signal is clear: agricultural wastewater, long treated as a disposal problem, is increasingly being reimagined as a recoverable resource — and the companies that can prove that conversion to independent, regulatory-grade standards are positioned to lead an industry that has very little appetite left for waiting around.