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Two years in, union leaders say Biden’s big climate law is making a difference.

The Inflation Reduction Act is by far the most important climate law ever passed in the U.S. But it also may go down as one of the most important labor laws of recent history. Overnight, jobs installing solar farms that were largely performed by an itinerant, low-wage workforce had the potential to become higher-paid positions occupied by skilled tradespeople — maybe even union jobs.
That’s because in order to qualify for a 30% tax credit on their investment or operating costs, clean energy developers now have to follow two key labor standards. They have to pay construction workers the federally determined prevailing wage for their region, plus hire a designated number of apprentices, who are provided with paid classroom instruction in addition to on-the-job-training.
“I don’t think people have a sense of the scale and the scope of what this law has done and is going to do,” Rick Levy, the president of the Texas AFL-CIO, told me. “From our perspective, putting community well-being and labor standards in the very fabric of this industrial expansion is going to pay dividends for generations.”
On the eve of the IRA’s two-year anniversary, a new report provided exclusively to Heatmap has identified 6,285 utility-scale clean energy projects planned, under construction, or already operating, that are likely candidates for these tax credits. Together, they represent an estimated 3.9 million jobs, according to the Climate Jobs National Resource Center, a nonprofit that supports unions fighting for worker-centered climate action, which compiled the data.
There’s no way to know, at least right now, how many of the projects still in progress will actually get built, or how many have or will adhere to labor standards. Safe harbor provisions in the law also allow developers to claim the full tax credit without adhering to the rules as long as they started construction by the end of January 2023, so the full effect of the provisions will take some time to be realized.
But the report reveals the vast potential for the law to create higher-quality jobs in clean energy all over the country. Based on my reporting, that potential is starting to materialize. Union leaders told me they’re now having conversations with developers who never returned their calls before. And renewable energy developers and tax credit consultants told me it was a no-brainer to meet the labor standards, even though they create substantial administrative burdens. Otherwise, they’ll only be eligible for a 6% credit, leaving a huge amount of money on the table.
Mike Fishman, the executive director of the Climate Jobs National Resource Center, told me that when he first started advocating for high-road climate jobs, he found that many trades workers were afraid of clean energy. “If they had a good job in the fossil fuel industry, then saying, we’re going to reach these goals and shut down all the fossil fuel plants, that was very scary to people.” But since the IRA passed, he’s seen a change in workers’ attitudes about supporting climate action. “It creates a sense that there’s a future for everyone — an economic future, as well as a climate future,” Fishman said.
The IRA’s potential to spur well-paid jobs and training opportunities is actually even larger than the Resource Center’s estimate indicates. The report only covers clean energy generation projects like wind and solar farms, but the law also tied labor standards to tax credits for the construction of clean energy manufacturing plants, EV chargers, carbon capture projects, hydrogen plants, clean fuel factories, and new, energy-efficient buildings.
The standards are likely to affect each of these industries in different ways, but it’s instructive to look at what’s already happening in renewable energy development. To do so, you first have to understand that developers sit near the top of a ladder of companies involved in bringing an energy project into the world. Above them sits investors; below, a series of contractors and subcontractors who manage the project on the ground and hire the workers who ultimately build it.
Before the IRA, everyone along this ladder had an incentive to keep costs as low as possible. At the top, developers are competing for power contracts with utilities. Contractors would try to win bids by quoting the lowest construction costs. Staffing agencies would source temporary workers from all over the country and negotiate wages and benefits on a case by case basis. An investigation into solar work by Vice found that it was “common to have two workers doing the same job for vastly different pay and living stipends.” Some would travel to a new place for a gig and “pile into motel rooms with other workers on the same projects in order to save money.”
The IRA disrupts that incentive structure, creating a new regime whereby the top priority is getting that 30% tax credit. The law also extended the ladder, creating new rungs of accountability thanks to new tax credit transferability rules that allow developers to sell their tax credits to third parties. That means there are a host of other companies looming over developers’ shoulders with a stake in making sure they don’t cheat the rules. Tax credit buyers don’t want to end up in a situation where the IRS audits the developer who sold them the credits, finds that there weren’t enough apprentices on the project, and claws back the money. The risk is serious enough that buyers also purchase insurance for these transactions, adding another layer of oversight.
“The lawyers are scaring everyone about this,” Derek Silverman, the co-founder and chief product officer of Basis Climate, a startup that matches tax credit buyers and sellers, told me. For example, the law contains a loophole for companies to claim the credit without hiring the required number of apprentices as long as they show they made a “good faith effort.” Treasury defines that as having reached out to at least one registered apprenticeship program in the area every year the project is operating. Silverman said he’s seen lawyers challenge companies that are trying to get around the requirement, asking them who they reached out to and berating them if it wasn’t a legitimate effort.
“They’re saying, you have a huge part of your capital stack that’s based off this tax credit,” said Silverman. “It’s not worth the downside of the government questioning through an audit that you didn’t meet these requirements, and then, boom, you owe them $20 million when it would have cost you $100,000 to do the documentation and get that all square.”
The upside is valuable enough that it’s generated a whole new cottage industry in tax credit compliance. Empact Technologies, for example, is a software company that collects and evaluates payroll data from contractors to make sure they are paying the correct wages and have the right number of apprentices. “Then we have to go back and essentially fix all of the mistakes that they made every single week” — like classifying workers incorrectly and paying them the wrong amount, or falling behind on apprenticeship hours — “which every single contractor does. It’s insane,” Charles Dauber, Empact’s founder, told me.
All of this has added much complexity — and cost — to renewable energy development. David Yaros, who co-leads Deloitte’s US Tax Sustainability Practice, told me that the cost of compliance, including hiring companies like Empact and Deloitte to compile all the documentation, could eat into 5% to 20% of the tax benefits.
“This has raised our costs,” Rodrigo Inurreta Acero, a government affairs manager at the international developer EDP Renewables, confirmed, referring specifically to the added cost of consultants rather than the mostly negligible cost of paying prevailing wages. “But, we are very, very happy to comply with this, because the juice is worth the squeeze.”
There’s clear incentives for developers to do everything in their power to meet the labor standards. The key question is whether these two little provisions — prevailing wage and apprenticeships — are strong enough to “build a strong pipeline of highly-skilled workers” and “ensure clean energy jobs are good-paying jobs,” as the Biden administration has said.
The need is definitely there. A census of U.S. solar jobs in 2022 found that 52% of solar installation and project development companies found it “very difficult” to find qualified workers, with electricians and construction workers being among the most difficult positions to fill.
But even if armies of lawyers are scaring companies into making serious efforts to hire apprentices, that doesn’t mean they are actually finding them. “It’s not clear at this stage whether apprenticeship programs are scaling up fast enough to match labor supply to project demand,” Derrick Flakoll, a policy associate at BloombergNEF told me. He pointed to an announcement made by the White House just last month of $244 million in grants to expand the Registered Apprenticeship system throughout the country. “I’d be skeptical that apprenticeship programs have been able to scale up yet,” said Flakoll.
There’s a catch with the wage requirement, too: “Prevailing wage” doesn’t necessarily mean a living wage, and it can vary dramatically from place to place. The rate is determined by surveys sent out to contractors and labor organizations, and is typically higher in jurisdictions with active labor unions. For example, in Falls County, Texas, where the 640 megawatt Roseland Solar project is under construction, prevailing wage for a general laborer is $8.75 an hour. In Sangamon County, Illinois, where the 800 megawatt Black Diamond Solar project is being built, prevailing wage for a laborer is $34.04 an hour plus benefits worth $29.26 an hour.
Nico Ries, the lead organizer for the Green Workers Alliance, which organizes solar and wind workers, told me solar wages seem to have only increased in places with higher union density. That’s because unions are now on a more even playing-field to compete for jobs in those areas, since their typical rates have become the de facto minimum.
To be clear, the prevailing wage and apprenticeship provisions do not require developers to hire union workers to build their projects. And there are plenty of non-union, registered apprenticeships. Ries told me that the temp staffing agencies that have served the solar industry in the past are quickly standing up apprenticeship programs to stay on top of the market under the IRA. The main problem with that, they said, is that unlike union apprentices, these workers have no representation.
“There’s a lot of misinformation,” Ries said. “People think they are joining an apprenticeship and it’s going to be a whole thing, but it’s really just a little training or two, and then they slap a sticker on your hard hat.”
Nonetheless, unions are starting to make inroads in solar in places that have long been hostile to organized labor. Ethan Link, the assistant business manager for the Southeast Laborers’ District Council, which has members in right-to-work states throughout the south, told me that before and after the IRA was like “night and day.” For the first time, solar developers are calling the union directly to talk about projects on the horizon and to figure out how to work with them. As a result, the union is investing in more solar-specific training for its apprenticeship instructors.
“The Inflation Reduction Act is one of the most consequential and, I think, also most innovative ways of inducing the market to have broad based benefits for the community,” Link said. “The way I’ve experienced it, it’s changed the landscape on the ground with these developers within a matter of months, rather than a matter of years.” He said they don’t yet have a lot of workers actually assigned to projects, but “we’re really optimistic about where things sit right now.”
Kent Miller, president of the Wisconsin Laborers’ District Council, told me his union has been able to double its apprenticeship program from around 300 to 400 students a few years ago to closer to 700 to 800 post-IRA. It’s now looking to build another training campus to expand its capacity. Not all of that growth is thanks to renewable energy, he said, but the union now has a significant portion of its membership that just works in utility-scale solar.
Earlier this year, Wisconsin’s four biggest electric utilities pledged to employ local, union labor on all future renewable energy projects. Miller doesn’t think this would have happened without the incentives in the IRA. Though every wind farm in Wisconsin has been built by union labor, the more nascent solar industry was starting to bring in non-union workers from out of state to build projects. The IRA incentives gave Miller’s union leverage in negotiations with the utilities, because future projects were going to need to be able to find registered apprentices. “Unions run the best registered apprenticeship programs,” he said. “It was showing what we could do, what we could bring to the table.”
There is one more small but potentially powerful incentive for developers to work with unions. The Internal Revenue Service has said that if companies sign a project labor agreement — an agreement with one or more unions, made prior to hiring, that establishes wages and benefits — then they are less likely to be audited, and won’t have to pay penalties if they are found to be non-compliant.
To Levy, of the AFL-CIO in Texas, and others in the labor movement, getting workers to support clean energy is essential to tackling climate change. “Unless workers see themselves and their interests reflected in these new energy technologies, there’s never going to be the kind of political support that we need to be able to do the things we need to do to save the planet,” Levy said. The first step to achieve that, he said, is making sure these jobs are “good union jobs.”
The Climate Jobs National Resource Center connected me with Kim Tobias, a union electrician in Maine, as an example of how union jobs can change lives. Tobias used to work in call centers, providing customer service for healthcare software companies, before leaving to join the International Brotherhood of Electrical Workers. She was making $16 an hour in her last call center job after more than 10 years in the field, and was fed up after getting passed over for a promotion. When she started as an electrical apprentice in 2019, she essentially doubled her salary overnight once benefits were taken into account.
Today, in part because of the IRA, but also because of a state law that requires developers to pay prevailing wage on all large renewable projects in Maine, Tobias mainly works on solar projects. The work isn’t always ideal — she told me she once had to commute 75 miles away for a solar job — while she was pregnant, no less. “Then again, a year and a half later, I worked a solar job that was 0.9 miles away from my house. So it’s give and take,” she said.
But Tobias also said she sees potential to create high-quality clean energy jobs beyond solar in Maine, where, she lamented, “people under the age of 30 are leaving in droves.” She noted that an old paper mill in Lincoln, Maine, is being turned into an energy storage site, and the developer has already said it would establish a collective bargaining agreement with the Maine Building and Construction Trades. Illustrating Levy’s point about political support, the union is also now advocating for the construction of a new port to support the offshore wind industry, which would have to be built with union labor under a recent state law.
Even if the IRA’s labor provisions are starting to work, which it seems they are, they contain one significant weakness. The rules only apply to the construction of projects — not to their operations. It’s an improvement to have labor standards for construction jobs. But once they are built, wind and solar farms don't take many people to operate. The federally subsidized clean energy manufacturing plants springing up around the country due to the IRA will create a lot more jobs, but, at least right now, those jobs don’t have to be “good.”
“I think that people need to understand the opportunity here,” said Levy, and make sure that we continue to build on it and not turn back.”
Editor’s note: This story has been updated to clarify the “good faith effort” exception to the apprenticeship provision and that both provisions apply only to construction.
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Plus three big announcements from the annual hullabaloo.
Now in its fourth year, San Francisco Climate Week is noticeably bigger and buzzier each time I go. When I first attended in 2024, everyone was trying to shoehorn generative artificial intelligence into climate solutions. Last year, founders and funders were struggling to figure out how to deploy capital and stay afloat after Trump took a hammer to Biden-era climate incentives.
This year — which reportedly saw double 2025’s attendance, with roughly 60,000 people choosing from more than 700 events — everyone was banking on the data center buildout, the speed-to-power race, and the broader effort to squeeze more capacity out of the existing grid to save climate tech. Given that the AI race is essentially keeping the U.S. economy afloat during a tumultuous year of tariffs, war, and ongoing energy price shocks, that doesn’t look like such a bad bet, at least for now.
But it wasn’t the only issue at play. Critical minerals were another hot topic, while conversations around adaptation and resilience are finally becoming a bigger part of the picture. I also moderated a surprisingly technical panel on distributed energy resources and virtual power plants, though that inevitably managed to touch on data centers and strategies for managing AI-driven load growth, too.
At Heatmap House, our day of conversations and roundtables with leading climate thinkers, one investor mentioned he had recently backed a lab-grown meat startup – a true contrarian investment if I’ve ever seen one. And my colleague Robinson Meyer hosted a fascinating pair of back-to-back conversations on a controversial geoengineering approach known as solar radiation management, which proposes using aerosolized chemicals to reflect sunlight away from Earth. He first spoke with the CEO of Stardust Solutions, a private company actively building this tech, followed by an advocate for research into solar engineering but certainly not near-term commercial deployment.
It’s impossible to capture the exact essence of a conference with hundreds of individual events — at some level, it’s always going to be what you make of it. But as I bopped around the city shaking hands, I picked up a range of interesting perspectives, along with three pieces of news that I thought were worth unpacking here — one related to funding for critical minerals, and two focused on bringing data centers online as quickly and cleanly as possible.
At a Climate Week event, Atana Elements CEO Thomas Wilson disclosed that the critical minerals exploration startup has quietly closed its seed round, which totals $27.5 million, according to an SEC filing. The round includes participation from Earthshot Ventures, as well as Lowercarbon Capital, and Hitachi Ventures. Last year Atana officially — but stealthily — spun out of Lilac Solutions, a startup developing a cleaner method of extracting lithium from saltwater brines.
But while Lilac is focused on commercializing its novel lithium extraction technology, Atana is tackling the broader upstream mineral discovery process. Its scope includes lithium, but extends to other so-called “flowing” critical minerals dissolved in brines, such as helium, hydrogen, and copper. In the years before the spinout, Atana compiled reams of historical geological datasets — think “Soviet-era oil and gas reports,” Wilson said. It used these to train predictive artificial intelligence models designed to identify previously overlooked mineral deposits.
“You can think of Atana as somewhat analogous to Kobald, but for flowing minerals such as lithium brines rather than hard rock resources,” said Matt Logan of Earthshot Ventures at the event, hosted by the nonprofit climate tech investor Elemental Impact. Kobald similarly uses AI for minerals discovery, and following a $537 million Series C round last year, is reportedly valued at nearly $3 billion.
Atana formed as a team within Lilac back in 2019, benefiting from the more mature startup’s relatively long and well-funded runway — Lilac has raised about $315 million to date. “We have found some of the biggest deposits in the world, and we’ve drilled 19 exploration wells across three continents,” Wilson said. “Around 2% to 3%of the world’s new minerals have been found by this particular team.” That’s a huge number for a startup that’s yet to even formally launch.
To date, Atana has identified a high-grade lithium brine resource in an Argentinean salt flat and secured 1.5 million acres across Germany and Poland, where it’s conducting exploration for lithium brine deposits. While lithium is likely to remain a core market, Wilson said he’s looking forward to broadening Atana’s ambition, asking “now that we’ve been released from the Lilac lithium play, what can we do in copper, helium, hydrogen, and where can we do that in other parts of the world?”
Data center-driven load growth, speed-to-power, and grid flexibility dominated the conversation at SF Climate Week, and the much-hyped data center management platform Emerald AI came prepared with a fitting announcement: It’s partnering with Silicon Valley Power, Santa Clara’s municipally owned utility, not only to demonstrate the benefits of flexible data centers for the grid, but to actually attempt to implement a program that expedites grid interconnection for data centers with flexible loads.
The latter objective differentiates this from Emerald AI’s earlier utility pilots, which were primarily technical demonstrations of its software — proving it can slow, pause, or reroute AI workloads during periods of peak demand without disrupting critical operations, which research shows could unlock nearly 100 gigawatts of grid capacity. This new pilot appears to go a step further by explicitly linking that flexibility to interconnection outcomes. As Emerald AI’s business development lead Daniel Padilla confirmed at a panel, data centers operating flexibly in Silicon Valley Power’s territory “will get material acceleration in time-to-power.”
Santa Clara, which sits about 45 miles south of San Francisco, is a major West Coast data center hub, with roughly 58 facilities packed into 19 square miles, according to Chris Karwick, Silicon Valley Power’s assistant director of utility operations, who spoke later at the same event. Karwick confirmed that the pilot with Emerald includes a “flexible load interconnection program,” and noted that while utilities broadly recognize the need for solutions to rising data center load growth, few are eager to be first movers. “We’re the electric utility for a city. We’re not known for being innovative — we’re usually followers. So this is big for us,” he explained.
Since emerging from stealth last summer, Emerald AI has already raised $67.5 million, and is now working with Nvidia to develop a 96-megawatt flexible data center facility in Virginia called Aurora, which Padilla said is expected to come online in October.
As Heatmap’s end-of-year survey revealed, experts widely consider Meta to be among of the worst hyperscalers when it comes to its climate impact and sustainability efforts. But the company nevertheless maintains a net-zero by 2030 target, even as it continues to bring plenty of new natural gas capacity online to power its AI expansion. Now, however, the company is throwing its weight behind a markedly greener — and less proven — technology, the ultra-long duration energy storage startup Noon Energy.
Meta announced this week that it has reserved 100 gigawatt-hours of storage capacity from Noon, which completed a successful demonstration of its 100-plus-hour carbon-oxygen battery earlier this year. Noon’s system charges by breaking down CO2 and discharges by recombining it using a technology known as a reversible solid-oxide fuel cell, and is certainly one of the earliest-stage data center power technologies that Meta has supported.
“There’s an urgency now that I don’t think existed before,” Carolyn Campbell, head of clean technology innovation at Meta said at a Climate Week panel, referring to the need to deploy emerging energy tech to meet the surge in data-center driven electricity demand. She added that Meta is evaluating how its procurement strategy can help commercialize early-stage climate tech — an area it so far hasn’t backed as extensively as its peers Google and Microsoft.
“When we sign a partnership agreement with a new company, does that help them with their next financing round because their investors see a different level of interest in the technology than they would have otherwise?” Campbell speculated. “Can we provide some upfront development capital to support a pilot that was maybe conceptual — going from concept to reality? So I think that’s one of the things that I’m really excited about with the Noon partnership.”
As I reported earlier this year, Noon CEO Chris Graves expects initial commercial deployments to begin as soon as next year, with early systems installed onsite to allow data centers or other large loads to draw power directly from Noon’s batteries rather than interconnecting to the grid itself. The startup’s collaboration with Meta will kick off with a 2.5-gigawatt-hour project, scheduled for completion by 2028.
Climate tech investors talk investing in moonshots at SF Climate Week.
Three climate investors walked onto a boat.
That’s not the start of a joke — it’s a description of a panel at Heatmap House, a day of conversations and roundtables with leading policymakers, executives, and investors at San Francisco Climate Week (at the Klamath, a venue made out of an old ship).
Heatmap’s Katie Brigham moderated the roundtable conversation with Prelude Ventures Managing Director Gabriel Kra, Azolla Ventures co-founder Matthew Nordan, and Toba Capital Partner Susan Su. Many of their investments are in moonshot climate technologies that other financial players might avoid.
“Things that look contrarian is kind of what we do,” said Kra. “Occasionally, there’s an idea that looks bad that’s actually a good idea.”
Prelude Ventures funds early-stage climate companies that are “weird, or non-consensus, or counter cyclical, or just ahead of the curve,” according to Kra.
Nordan, for instance, said he backs cultivated meat despite some doubts that the category will achieve widespread popularity.
“I’m presently leading an investment in a company called Pythag Technologies,” said Nordan, talking about the generative AI company focused on lab-grown meat. “It’s actually a really interesting time to invest counter-cyclically in a field like that.”
Like Nordan, Su described her firm as one that is open to unconventional choices.
“We are very weird in that we invest across lots of different categories and lots of different stages,” said Su.
One of her personal investments is in Xeno. “This company does electric motorbikes for commercial drivers, as well as swapping and energy networks in emerging markets, starting in East Africa,” she explained.
The panelists told Katie that opting for less popular investments can be rewarding because they may help fund a major breakthrough.
“We placed a couple of bets on fusion before this current melée occurred that sort of had everybody thinking that, you know, fusion was the next hot thing,” said Kra (who claimed that he intended the pun).
Nordan emphasized the gap that venture can fill, left by larger institutional investors who may shy away from high-risk technologies.
“If there are true breakthroughs out there that just may not be investable by mainstream finance at the earliest stages,” Nordan said, “not because people don’t think they’re really good ideas, but they may be crazy early-stage or kind of weird, or non-consensus, or counter-cyclical, or just ahead of the curve, it would be a real shame.”
Noise ordinances won’t necessarily stop a multi-resonant whine from permeating the area.
What did you do for Earth Day this year? I spent mine visiting a notoriously loud artificial intelligence campus in Virginia’s Data Center Alley. The experience brought home to me just how big a problem noise can be for the communities adjacent to these tech campuses – and how much further local officials have to go in learning how to deal with them.
The morning of April 22, I jumped into a Toyota Highlander and drove it out to the Vantage VA2 data center campus in Sterling, Virginia, smack dab in the middle of a large residential community. The sensation when I got out of the car was unignorable – imagine an all-encompassing, monotonous whoosh accompanied by a low rumble you can feel in your body. It sounds like a jet engine that never stops running or a household vacuum amplified to 11 running at all hours. It was rainy the day I visited and planes from nearby Dulles International Airport were soaring overhead, but neither sound could remotely eclipse the thudding, multi-resonant hum.
If you want to hear the sound for yourself, this video accurately sums it up.
After parking nearby I walked to one of the residential enclaves adjacent to VA2. One resident of a home across the street, who declined to give me her name, said she moved there before the project was completed. When asked how she felt about the noise, she told me, “It’s not as bad as it could be on the other side [of the data center], where all the equipment is.” (While the sound does get louder on the other side, I could clearly hear VA2 from her driveway.)
VA2’s noise has been causing problems for months, as documented by numerous social media posts, local news clips, and a feature published in Politico. It’s doubtful many of those living near the data center wanted it there. The project was built quite quickly – so quickly that Google Earth still shows undeveloped woodlands on the site. Per public filings, Vantage first proposed the facility in 2022 under the county’s fast-track commercial incentive program, an expedited permitting process for specific preferred industries. It was under construction as recently as October 2024, according to images captured by Google Street View.
Noise is one of the most common issues associated with data centers. At least a third of all conflicts over data centers are over noise complaints, and noise is the number one reason for opposition in cases where projects were ultimately canceled, according to Heatmap Pro data.
This issue goes back almost a decade. In 2019, residents of the Phoenix ex-urb Chandler, Arizona, became irate after a loud monotonous hmmmm began emanating from a CyrusOne data center. In that case, CyrusOne traced the noise back to chilling fans, and the company reduced the sound with muffling devices.
Chandler wound up adopting a new ordinance in 2023 requiring sound mitigation measures to prevent companies from exceeding certain ambient noise levels in the surrounding areas. That did nothing to improve the mood of the people who live there, however. Now Chandler, once known as a potential data center development hub, is now firmly in the anti- camp. The city council unanimously rejected a proposed $2.5 billion data center campus in December over noise concerns, despite an expensive lobbying push backed by former Arizona Senator Kyrsten Sinema.
As data centers spread across the U.S., noise is becoming an ever-more-common complaint. You can hear the familiar hum at a DataOne data center project in Vineland, New Jersey. DataOne told us they “understand concerns about ambient noise in the area” and are operating within the limits of local noise ordinances.
The hum is also in Dowegiac, Michigan, where people living nearby are calling their new Hyperscale Data facility a “noise trap,” with little explanation to date for the issue. Hyperscale Data did not respond to a request for comment.
And the hum is in Mount Pleasant, Wisconsin, where the sound from a new Microsoft data center campus rises above any din from rain. The hyperscaling giant is doing more to mitigate the issue than I’m used to seeing from data center developers, however.
On April 15, the company published an update on its own internal investigations into noise complaints. “Although the facility noise levels meet the requirements set by local ordinance, we take this feedback seriously and understand the impact this has had on our neighbors,” the update read. “We anticipated that our systems would need adjustments and create some noise as part of the datacenter startup, but we did not expect the tonal quality of the sound to travel as far as it has.”
To address the noise, Microsoft said it was “manually adjusting the cooling fans” to reduce noise, and that “we expect this change to address community concerns about the tonal humming.” On top of that, the company said it will install “additional sound reduction components” to “provide even further reductions in measured sound levels.” A Microsoft spokesperson told me in an email: “We’ve identified the source of the noise concerns and have implemented changes to significantly reduce sound from our facility.”
It isn’t cooling fans causing the noise at Vantage’s VA2 in Virginia, however. The sound, according to media reports, is coming from gas turbines powering the data center.
VA2 is one of the first in Virginia to function entirely off-grid, a design companies are adopting in order to avoid lengthy grid connection processes. Company spokesman Mark Freeman told me the facility is “fully compliant with all local noise ordinances, and this has been verified by third-party sound studies.”
“Additionally, in line with our commitment, we are actively working with third-party engineers to explore additional sound mitigation options,” Freeman continued. Freeman said “Our goal is to further reduce noise levels where possible and continue to foster a positive environment for everyone.”
Here’s the thing, though: I visited the Vantage campus after initially hearing from the company, and it was loud. Very loud.
I did not bring a decibel meter with me, so I cannot know whether they were operating within legal limits that day. What I do know is that noise ordinances struggle to properly capture sounds in multiple frequency ranges, making high and low frequencies challenging to regulate, according to the Environmental and Energy Study Institute, a bipartisan non-profit think tank. Officials representing Loudon County, where VA2 is located, have acknowledged that the local ordinance may need to change in order to address the most distressing frequencies from the data center campus.
“We can change the zoning ordinance and noise ordinance,” Loudon County supervisor Mike Turner told local TV station WUSA9 last week. “Noise can be mitigated. I just don’t believe that the noise problem cannot be solved.”
I wrote Freeman, the Vantage spokesman, to tell him I had visited the VA2 campus and found the noise to be “quite foul.” He replied soon after, telling me that Vantage is going “above and beyond what is required in order to address concerns from nearby residents.” The company is using “targeted enhancements to turbine-related equipment such as dampening equipment, enclosure inlets and enclosure exhausts.” These measures “represent meaningful progress and will help us better evaluate the effectiveness of the broader solutions under consideration.” Freeman also said the company is “actively assessing additional options” focused on “targeted frequency ranges.”
As we continue to track local regulation of data centers, I’m we’ll see many more cases like VA2, in which obtrusive sound prompts forms of regulation we may have never seen before.
Or, people will just hear these noises and say no to more data centers.