Wisconsin

Energy/Power is the dominant stressor: the debate centers on who pays for grid upgrades, new generation, and utility plant costs, with PSC proceedings and rate-class proposals at the center. Water/Geology is the secondary stressor: Wisconsin bills and local opposition have highlighted cooling-water use, closed-loop systems, aquifer concerns, and water reporting. Milwaukee Journal Sentinel, Milwaukee Journal Sentinel

None identified. The main 2026 political action is local ballot and council activity rather than candidate races; Politico noted one gubernatorial candidate was considering a more permanent moratorium, but no named 2026 race has made data centers a central campaign issue. POLITICO, POLITICO

Madison enacted a one-year temporary ban on new large data centers over 10,000 square feet in January 2026, after a unanimous council vote; it does not cover smaller data centers for hospitals or research uses. POLITICO. No statewide moratorium or ban has been enacted as of May 2026. The most important local anti-data-center measure is Port Washington’s referendum, which does not ban the campus itself but requires voter approval before city leaders award tax incentives; the measure has been challenged in court by the Metropolitan Milwaukee Association of Commerce. POLITICO

Wisconsin Republicans advanced Assembly Bill 245 / Senate Bill 244 to revise the sales-and-use-tax exemption for qualified data centers, but the core 2026 cost-shift fight is Assembly legislation passed on Jan. 20 requiring the Public Service Commission to ensure utility infrastructure costs for data centers are not shifted to other ratepayers; Journal Sentinel reporting said the bill was expected to face Gov. Tony Evers’ veto and that no Senate action had been scheduled. A November 2025 Democratic bill would require reporting of energy and water use, create a new data-center rate class, and prohibit cost shifting; We Energies also proposed a special very-large-load rate structure for data centers, with debate over a 75/25 cost split for plant costs. Milwaukee Journal Sentinel, Milwaukee Journal Sentinel, Wisconsin Legislature, Wisconsin Legislature

Port Washington’s anti-data-center referendum already passed in April 2026 and is the state’s first such measure, but it concerns future tax-incentive approvals rather than a direct construction ban; the measure is facing litigation. Janesville is slated to vote in November 2026 on a measure that could require voter approval for projects over $450 million and could affect plans to redevelop a former GM plant into an AI factory. POLITICO, POLITICO, Ballotpedia

1) Port Washington, Ozaukee County — $15 billion, 1.3-gigawatt Stargate-style AI campus tied to OpenAI and Oracle and being developed by Vantage Data Centers; it is under construction/contested and now entangled in a tax-incentive referendum and lawsuit. POLITICO 2) Janesville former GM assembly plant — proposed AI factory/data center redevelopment; status is contested and headed to a November referendum. POLITICO 3) Cassville / Grant County — a $1 billion project in the Driftless Area is being considered and has prompted early local concern, but remains in a preliminary proposed stage. Milwaukee Journal Sentinel, Wisconsin Watch

Great Lakes Neighbors United; Metropolitan Milwaukee Association of Commerce (opponent of Port Washington referendum); Clean Wisconsin; Citizens Utility Board; local Port Washington and Cassville grassroots organizers. Milwaukee Journal Sentinel, POLITICO, Wisconsin Watch, Milwaukee Journal Sentinel

None identified at the state political-surface layer as of May 2026. Talent and workforce dynamics in Wisconsin surface primarily at the sub-state and labor-market level — county and municipal proceedings on named projects, regional building trades council positions, and utility commission workforce testimony — which are out of scope for the tracker's state-political-surface read. Request a full RAIL briefing for sub-state and labor-market analysis.

Growing cluster. Wisconsin had no hyperscale data centers operating yet in early 2026, but at least $46 billion in hyperscale projects were under construction or under consideration statewide, with notable activity in Port Washington, Mount Pleasant, Beaver Dam, Janesville, Kenosha, Menomonie, and Grant County. Wisconsin Watch, Wisconsin Watch

“The issue is we only have 2.8 million homes in Wisconsin,” Clean Wisconsin spokesperson Amy Barrilleaux said, underscoring why utility demand has become politically salient. Wisconsin Watch

POLITICO: Wisconsin city passes nation's first anti-data center referendum, POLITICO: A tech hub just slammed the brakes on data centers, Milwaukee Journal Sentinel: Wisconsin bill setting data center rules passes but faces opposition, Milwaukee Journal Sentinel: Electricity analysts raise concerns over proposed data center rate plan, Wisconsin Legislature: Assembly Bill 245, Wisconsin Legislature: Senate Bill 244