The next water war: AI data centers and Michigan's most precious resource

Somewhere in the Lower Peninsula of Michigan, a technology company is quietly planning a facility that will consume more water each day than a small city. It will not be a steel mill, a paper plant, or a municipal water authority. It will be a data center — a climate-controlled cathedral of servers built to power artificial intelligence — and it is coming whether Michigan is ready or not.

The AI boom has triggered one of the most consequential infrastructure races in American history. The physical backbone of artificial intelligence — the data centers that train models, run applications, and store the world's information — requires two things in staggering abundance: electricity and water. For years, companies like Microsoft, Google, Amazon, and Meta built these facilities in the arid Southwest, where cheap land was plentiful and, crucially, where no one was paying close enough attention to the water. That calculus has changed. The Great Lakes region — holding nearly 21 percent of the world's surface freshwater — has become the most attractive data center market in the country.

Michigan sits at the center of this storm. And the legal framework for protecting private water rights, groundwater resources, and the communities that depend on them has never been more urgently relevant.

150B Gallons projected annual draw from Great Lakes by data centers in next 5 years

6.4 GW Data center power deals announced by DTE & Consumers Energy in October 2025 alone

$98B Worth of data center projects blocked by community opposition nationally

Why Michigan, and why now?

The math is simple. A large-scale AI data center can consume between one and five million gallons of water per day — not to produce a product, not to irrigate crops, but to cool the servers that would otherwise melt under the thermal load of continuous computation. In Arizona and Virginia, where most of the country's existing data center capacity is concentrated, communities are already confronting water deficits they cannot reverse. Newton County, Georgia, is projected to face a water shortfall by 2030 after a single Meta facility broke ground there. Indiana has already seen residential wells fail in areas adjacent to data center construction dewatering operations.

Michigan offers what those markets cannot: abundant surface water, deep aquifer systems, a temperate climate that reduces cooling loads, and — until recently — a relatively permissive regulatory environment that tech companies' site-selection teams know how to exploit. The state's 2024 legislation offering data centers significant sales and use tax exemptions has sent an unmistakable signal. In October 2025 alone, DTE and Consumers Energy announced data center power agreements totaling 6.4 gigawatts of capacity — the rough equivalent of adding six major cities to Michigan's energy grid over the next two to three years.

"When data centers are connected to municipal water supplies, there is no tracking or reporting requirement regarding water usage. It falls to the water system to report that use — and that acts as a black box." — Alliance for the Great Lakes

The Alliance for the Great Lakes has warned that these facilities could draw more than 150 billion gallons annually from the region within five years — enough to supply over 4.6 million homes. And in almost every case, the precise volume of water being withdrawn is shielded from public disclosure by nondisclosure agreements between companies and local governments. The transparency crisis is as acute as the resource crisis itself.

The legal landscape: Michigan's water rights framework

Michigan's water law is older than the data centers threatening to test it — rooted in centuries of English common law and refined by Michigan courts and the state legislature over decades of industrial disputes. Understanding it is essential to understanding both the protections available to landowners and the gaps that make the current moment so legally consequential.

Riparian rights and the reasonable use doctrine.

Michigan recognizes riparian rights — the right of a landowner whose property borders or sits above a water source to make reasonable use of that water. These rights are not absolute; they are constrained by the equal and correlative rights of neighboring landowners. Michigan courts have applied a balancing test, sometimes called the "Michigan rule," that asks whether a given use unreasonably interferes with another party's water access. Critically, Michigan courts have held that even municipal governments possess no greater groundwater rights than a private landowner — a principle with direct implications when a tech company draws down an aquifer serving adjacent private wells or spring-fed water features.

The Water Withdrawal Assessment Program (WWAP)

Michigan requires any entity proposing to withdraw 100,000 gallons per day or more to register with the Michigan Department of Environment, Great Lakes, and Energy (EGLE) through the Water Withdrawal Assessment Tool (WWAT) before beginning operations. Withdrawals exceeding two million gallons per day require a full permit. The WWAT is a hydrological screening model that estimates whether a proposed withdrawal will cause an "adverse resource impact" to nearby streams, rivers, or wetlands. Any proposed data center of meaningful scale will trigger this threshold — creating a mandatory public process and hydrological impact assessment that represents the first and most accessible intervention point for affected landowners.

The Aquifer Protection and Dispute Resolution Act (PA 177 of 2003)

Michigan enacted this statute precisely because aquifer conflicts were becoming more common. Under PA 177, EGLE is empowered to investigate claims that high-capacity well operations are depleting groundwater supplies. Where causation is established, EGLE can order remedies including mandatory water supply restoration, withdrawal reduction, and financial compensation to affected parties.

The Great Lakes Compact

Michigan's water withdrawal regulations exist within the larger framework of the Great Lakes-St. Lawrence River Basin Water Resources Compact, a binding agreement among eight states and two Canadian provinces. The Compact prohibits diversions of Great Lakes water outside the Basin and requires that withdrawals within the Basin be managed in a manner consistent with conservation and the long-term integrity of the water resource. A data center that consumes — rather than returns — vast quantities of water from the Great Lakes watershed implicates these compact obligations in ways that courts have not yet fully adjudicated.

KEY LEGAL MECHANISMS FOR MICHIGAN LANDOWNERS

01  EGLE WWAT Registration & Permitting Mandatory process for any withdrawal over 100,000 GPD. Creates public notice, comment periods, and hydrological impact review — the primary intervention point before operations begin.

02  PA 177 Groundwater Dispute Complaint Administrative remedy triggered when a landowner reports impaired water supply. EGLE investigates, mediates, and can order withdrawal reductions or compensation.

03 Common Law Nuisance & Trespass Claims Where dewatering or high-capacity pumping demonstrably diverts subsurface water from neighboring property, Michigan's reasonable use balancing test supports damages and injunctive relief in circuit court.

04  Great Lakes Compact Advocacy Net-consumptive withdrawals from the Basin trigger Compact obligations — a basis for state-level challenge and legislative pressure for stricter reporting requirements.

05  Local Zoning & Permit Intervention Despite state tax incentives, municipalities retain authority over zoning, site plans, and water withdrawal permits. Organized community intervention — as in Saline Township — has yielded meaningful concessions.

The challenges ahead

The legal framework that exists is meaningful — but it was not designed for this moment. Several structural challenges will define water rights litigation in Michigan over the next decade.

The transparency gap

The most immediate problem is that no one knows exactly how much water these facilities are taking. When data centers connect to municipal water supplies rather than drawing directly from wells, they are exempt from the large-quantity withdrawal reporting requirements that apply to direct extractors. The facility's consumption simply blends into the municipality's aggregate annual report — invisible to neighboring landowners, watershed advocates, and regulators alike. Closing this gap will require either legislative action or creative litigation strategies that surface consumption data through discovery or public records requests.

Cumulative impact attribution

Michigan's WWAT and common law framework are both designed for bilateral disputes — one well, one affected neighbor, one causal chain. The emerging problem is cumulative: dozens of large-capacity withdrawals scattered across a watershed, each individually within permissible limits, collectively depleting the aquifer over years. Establishing causation in that environment will require sophisticated hydrological expert testimony and a willingness by courts to expand the reasonable use analysis to account for aggregate impacts.

The speed-to-construction problem

Tech companies are building at extraordinary speed, backed by capital that enables rapid permit acquisition and construction. Once a facility is operating and contracts are signed — power agreements, cooling infrastructure, long-term service commitments — the practical ability to shut it down or significantly reduce its water withdrawal is severely constrained. The litigation window that matters most is before construction, during the EGLE permitting and local zoning phases. Landowners and communities who wait until a facility is operational have far less leverage.

The public trust doctrine question

A package of bills introduced in the Michigan legislature would apply the public trust doctrine to the state's groundwater — declaring all surface and subsurface water a collective public resource managed by the state, rather than a correlative private right. Proponents argue this would give regulators greater authority to deny high-impact withdrawals in the public interest. Opponents — including many private landowners — argue it would effectively extinguish the riparian rights that currently protect them. How this tension resolves will fundamentally reshape the water rights landscape in Michigan, regardless of data centers.

What landowners and communities should do now

The most valuable thing any landowner with significant water resources can do today is establish a documented baseline. A professional hydrological survey quantifying spring output, well yields, and aquifer levels creates the evidentiary foundation for any future impairment claim. Courts require before-and-after data to establish causation — and by the time a conflict arises, it may be too late to reconstruct what conditions looked like before the data center arrived.

Beyond documentation, affected parties should monitor EGLE's WWAT registration database for new large-quantity withdrawals in their watersheds, engage actively in the local zoning and permitting processes for proposed facilities, and consult legal counsel about whether existing water use patterns are properly registered and protected under Michigan law.

For communities, the lesson from Saline Township — where organized local opposition secured $14 million in community investment concessions before approving the Stargate facility — is that early engagement and unified voice produce outcomes that litigation after the fact cannot. The time to act is in the site-plan and permit phase, not after the cooling towers are running.

The litigation window that matters most is before construction begins — during the permitting and zoning phases, when landowners and communities still have maximum leverage.

Michigan's water has sustained industry, agriculture, and communities for generations. The AI economy will test those resources in ways the law was not written to anticipate. But the legal tools exist. The question is whether property owners, communities, and their counsel will mobilize them in time.

Questions about your water rights?

McDonald Hopkins' litigation and environmental teams advise landowners, municipalities, and businesses navigating Michigan's water withdrawal framework — from EGLE permitting intervention to common law groundwater disputes. If you have concerns about how data center development near your property may affect your water resources, we welcome the conversation.