Wisconsin’s Assembly Bill 840 tightens rules on new data centers by forcing closed-loop cooling, mandatory water reporting to the DNR, and bonded site restoration, which directly affects facility design and siting.
The bill also tells the Public Service Commission to keep grid upgrade costs for these power-hungry sites off general ratepayers’ bills, making interconnection economics a front-and-center planning issue for operators.
Requiring on-site renewable energy for data centers that primarily rely on renewables limits use of remote utility-scale projects and could constrain options for large AI GPU campuses that need massive, stable power.
Unions oppose the bill because it omits prevailing wage protections and question whether it truly mitigates environmental impact, signaling possible friction and delays on construction and grid projects.
Democrats had floated an alternative with stronger labor rules, broader energy and water reporting, and green building certification, which would have added more compliance overhead but clearer ESG signaling for large AI tenants.
Lawmakers acknowledge that some of these facilities draw power on the scale of a small city, underlining the operational reality that GPU-heavy AI clusters are now central to state-level energy planning.
This piece is useful context for how one state is trying to balance AI-driven data center growth, labor politics, and grid stress, and it’s worth a full read for anyone modeling long-term siting and power risk.
Source: Wisconsin Assembly Passes Data Center Bill Amid Union Opposition
