Category Archives: data centers

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Don’t give data centers a pass on pollution

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Senator Petersen and a group of advocates
Senator Chap Petersen talks with advocates at the General Assembly on February 3. Photo courtesy of Piedmont Environmental Council

In 2019, with Northern Virginia’s data center boom well underway, I worked with the Sierra Club to provide comments to the Department of Environmental Quality (DEQ) on a proposed major source air permit for a data center. 

We urged that the data center, owned by Digital Realty, be required to minimize its reliance on highly-polluting, back-up diesel generators by installing on-site solar and battery storage. While rooftop solar alone wouldn’t produce more than a fraction of the energy a data center uses, solar panels and batteries could provide a strong first line of defense against grid outages, without the air pollution. 

It wasn’t a new idea; other data centers elsewhere were using clean energy and storage or installing microgrids capable of providing all of the power the facility needed. Yet DEQ rejected the suggestion and gave the go-ahead for the data center to install 139 diesel generators with no pollution controls. 

Three years later, data centers have proliferated to such a degree that the power grid can’t keep up. DEQ is now proposing that more than 100 data centers in Loudoun, Prince William and Fairfax counties be given a variance from air pollution controls so they can run their diesel generators any time the transmission system is strained. DEQ is taking comments on the proposal through March 14 and will hold a hearing at its office in Woodbridge on February 27.

As a resident of Fairfax County, I’ll be one of the people forced to breathe diesel pollution to keep data centers running. Make no mistake: There would be no grid emergency without these data centers’ thousands of megawatts worth of electricity demand. And there wouldn’t be a threat to Northern Virginia’s air quality without their diesel generators. 

It’s fair to ask: Should these data centers have been built if the infrastructure to deliver power to them wasn’t ready? I’d also like to know why DEQ thinks it’s okay to impose on residents the combined pollution from many thousands of diesel generators firing at once, when it has known since at least 2019 that viable, clean alternatives exist. 

Batteries alone are an obvious solution for short-term emergency use, and can provide exactly the kind of help to the grid that will be needed this year. Instead of calling on data centers to run diesel generators, a grid operator can avoid the strain by tapping into a data center’s battery, a solution Google is implementing.      

But data centers can economically lower their energy and water costs as well as reduce strain on the electric grid by reducing their energy use and using on-site renewable energy. Global energy management companies like Schneider Electric, Virginia AECOM and Arlington’s  The Stella Group design microgrid solutions for data centers and other facilities that need 24/7 power.

I contacted Stella Group president Scott Sklar to ask how feasible it is for Northern Virginia’s data centers to meet their needs without diesel generators, given land constraints that limit their ability to meet demand with on-site solar. He told me data centers can start by reducing their cooling load by two-thirds by using efficiency and waste heat; cooling, he says, accounts for 38% to 47% of electricity demand. Cost-effective energy efficiency can reduce energy demand by one-third, and waste-heat-to-electricity can meet another 25% to 38% of the remaining electric load. “If you cut the cooling load and use waste heat to electricity, then you only need renewable energy and batteries for a maximum of half,” he concluded. “That’s doable.”

If Virginia data centers don’t start taking these kinds of measures, the situation will get worse. This year’s grid strain may be relieved through construction of new generation and transmission infrastructure, but the industry’s staggering growth rate threatens to create future problems. In 2019, when the Sierra Club was urging DEQ to think about the environmental impact of data centers, the industry consumed 12% of Dominion Virginia Energy’s total electric supply. Today, that number has risen to 21%, a figure that does not include the many data centers served by electric cooperatives rather than Dominion.  

Just last month, Gov. Youngkin announced that Amazon Web Services will invest $35 billion in  new data centers in Virginia, at least doubling Amazon’s existing investments here. By way of thanks, Youngkin wants taxpayers to provide up to $140 million in grant funding to Amazon and extend Virginia’s already-generous tax subsidy program. Ratepayers would also subsidize the build-out by contributing to the cost of new generation and transmission.

Amazon claims to lead the list of tech companies buying renewable energy, though its investments are mostly in other states and abroad. A scathing report in 2019 showed Amazon owned the majority of the data centers in Virginia at that time, but had made few investments in renewable energy here. Since then, Amazon has developed new solar facilities statewide, including enough to power its new Arlington headquarters. But as I discussed in a previous column, all the solar in Virginia would not be enough to make a dent in the energy appetite of Northern Virginia’s data centers, of which Amazon owns more than 100.  

I have no special beef with Amazon, but I do think that a rich tech company with pretensions to sustainability leadership should do more to walk the walk in the state that hosts so much of its operations. Surely that includes not relying solely on diesel generators for back-up power at its data centers. 

I also have no beef with data centers in general. They provide necessary services in today’s world, and they have to go somewhere. Data centers could be a valuable source of revenue and economic development for Southwest Virginia and other parts of the state that are not grid-constrained, if there are guardrails in place to protect nearby communities and the environment, and if they help rather than hurt our clean energy transition. Right now, none of this is the case.

Unfortunately, Gov. Youngkin not only doesn’t want guardrails, he doesn’t even want to know where and why they are needed. On February 3, a representative of his administration spoke in committee in opposition to legislation filed by Sen. Chap Petersen, D-Fairfax that would have the Department of Energy and DEQ study the impact of data centers on Virginia’s environment, energy supply and climate goals. The Senate agreed to the study, but a similar bill died in the House, and a House subcommittee killed Petersen’s Senate version Monday on a 2-1 vote. (The vote was later changed to 3-2 when two delegates who missed the meeting, and the discussion, added their votes. Killing a bill in a tiny subcommittee is one way House procedures allow delegates to avoid accountability on controversial issues — but that’s a topic for another day.)

I spoke with Sen. Petersen by phone after the subcommittee hearing. He pointed out that the administration would have been able to shape the study any way the governor wanted, and would have had control over the recommendations as well. Petersen’s conclusion: “He just doesn’t want anyone looking at it.”

Refusing to look at a problem, however, never makes it go away. And in this case, the problem is just getting bigger.

This article was originally published in the Virginia Mercury on February 15, 2023.

Update: On March 7, DEQ issued a new permit variance limited to data centers in Loudoun County. Although DEQ doesn’t say so, it appears that the original proposal has been modified. The comment period will now run through April 21, and another hearing will be held on April 6.

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Virginia has a data center problem

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Pageland Lane, currently running through farms and parks, will be the central artery of the new data center district.
Pageland Lane is currently rural but would be expanded to four lanes as part of the PW Gateway project. Boosters say increased tax revenues will benefit parks and schools.

Actually, Virginia has several data center problems.

One seems like a good problem to have, at least if you are a locality looking to attract business.

Data centers pay a lot of local taxes while requiring little in the way of local services, and the steady buildout has supported thousands of construction jobs across the region. Indeed, so many data center companies have chosen to locate in Northern Virginia that we now host the largest concentration of data centers in the world. No wonder other regions of the commonwealth are angling to bring data centers to their neck of the woods too.

But there’s more to being the data center capital of the world than just raking in cash. To drive through Data Center Alley is to witness suburban sprawl on steroids, with its attendant deforestation, loss of farmland and loss of wildlife habitat. The environmental destruction doesn’t stop at a facility’s property line; a single building covers acres of land, causing massive rainwater runoff problems that can impact streams and drinking water resources miles downstream.

Other problems are unique to the industry. Cooling the servers requires a single data center to consume as much water as a city of 30,000-50,000 people, and giant fans make the surrounding area noisy day and night. The average data center has so many backup diesel generators onsite that it requires a major air source permit from the Department of Environmental Quality. The generators have to be started up regularly to ensure they will work in an outage. Multiply those startups by the total number of data centers in Northern Virginia, and the result is poorer air quality across the region.

Moreover, data centers require astonishing amounts of energy to power their operations and cool their servers. The industry uses over 12% of Dominion Energy Virginia’s total electricity supply, more than any other business category. Electric cooperatives supply more. Industry sources put Virginia’s total data center load at 1,688 megawatts as of 2021 — equivalent to about 1.6 million homes. Feeding ever more of these energy hogs requires utilities to build new electric generation and transmission lines, with costs and impacts borne by all ratepayers.

Many data center operators have pledged to run their operations on renewable energy, but only a few major tech companies have followed through on building solar facilities in Virginia. Indeed, their energy appetite is so great that if all Virginia data centers ran only on solar energy with battery backup, meeting their current demand would require all the solar currently installed in Virginia, Maryland, DC, Pennsylvania, West Virginia and Delaware put together. (For you energy nerds, I’m assuming a 25% capacity factor for solar; that is, meeting 1,688 megawatts of data center load would take 6,752 megawatts of solar.)

That’s not a reason to send data centers somewhere else — unless, of course, we’re talking about data centers that host cryptocurrency mining (and yes, they exist in Virginia, with more on the way). Those data centers we should certainly send elsewhere, preferably to Mars, unless scientists find life there, and in that case to the nearest black hole in outer space. As for the others, we’d just like them to be part of the climate solution rather than adding to our carbon footprint.

Why are data centers so keen to locate in Northern Virginia? Historically the draws were the fiber-optic network in Northern Virginia, proximity to Washington, D.C., relatively low-cost energy and a concerted early effort on the part of Loudoun County to make locating here as easy as possible.

Then there are the state subsidies. Since 2010, Virginia has offered tax incentives to data centers that locate in the commonwealth. The data center sales and use tax exemption is by far Virginia’s largest economic development incentive. It’s also an increasingly expensive one, rising from $30 million in outlays in 2010 to $138 million in 2020. A state audit showed Virginia taxpayers had provided over $830 million to data center operators through 2020; by now the total is certainly over $1 billion.

A 2019 report of the Joint Legislative Audit and Review Commission found that Virginia received back only 72 cents for every dollar of the data center tax incentive while creating very few jobs. That money-losing proposition was judged “moderately successful.”

Thus far, opposition to data centers has tended to be local and focused mainly on land use issues. Preservationists have been at the forefront of opposition to Prince William County’s proposed Digital Gateway, a data center development across more than 2,100 acres in an area known as the “Rural Crescent.” The development would abut parkland and Manassas National Battlefield, leading opponents to call this a new Battle of Manassas. Citizens have sued the board of county supervisors for approving an amendment to the county’s comprehensive plan that allows the data center expansion.

The battle has spilled across the border into Fairfax County, whose leaders worry that stormwater runoff from the development will pollute the county’s main drinking water source, the Occoquan Reservoir.

The divide on data center siting is polarizing, but it isn’t partisan. The Democratic majority on the Prince William board of supervisors approved the Gateway project over opposition from Republican Supervisor Yesli Vega and state Del. Danica Roem, a Democrat. In a scathing op-ed, Roem argues that there’s no such thing as a green data center.

Since data centers provide essential services and have to locate somewhere, the answer isn’t to ban them from the state (crypto-mining operations excepted!). A better approach would be for Virginia to guide development away from overburdened areas to parts of the state that are desperate for new businesses, and to link tax incentives to energy efficiency and the use of renewable energy and reclaimed water.

Right now Virginia is operating on auto-pilot, paying ever more in tax incentives and fueling conflict, sprawl and carbon emissions. That needs to change.

This commentary appeared in the Virginia Mercury on December 9, 2022. Following that publication, I received emails about a data center proposal in Fauquier County with complaints strikingly similar to those in Prince William County. In addition, a reader in Chesapeake wrote that plans for the development of the Frank T. Williams Farm between a wildlife management area and the Great Dismal Swamp have proceeded with minimal public knowledge or input.

On December 11, Senator Chap Petersen sent an email to constituents criticizing the PW Gateway proposal for its impact on the battlefield and stating, “In the 2023 session, I intend to file legislation to both study and set logical limits on the siting of server farms in historically sensitive areas, as well as on the conversion of agricultural land.”

UPDATE: In its Q3 earnings call, Dominion Energy revealed data centers now make up approximately 21% of its Virginia load (see slide 30). Richmond, we have a problem.