Data center fact sheet · county
Ozaukee County, Wisconsin
As of . Latest dated change shown: Sep 14, 2026. Source: Data Center Census (datacentercensus.com), CC BY 4.0.
- Tracked projects
- 1
- 1 under construction
- Planned capacity
- 1.3 GW
- 1 project publishes a figure; 0 projects publish none
- Moratorium actions
- 0
- Upcoming hearings
- 0
Projects
| Project | Status | Planned capacity | Developer |
|---|---|---|---|
| Port Washington (Lighthouse) Data Center Campus Port Washington | Under construction | 1.3 GW | Vantage Data Centers |
Pauses and local rules
No moratorium action on record.
Upcoming votes and hearings
No upcoming hearing on record. Agendas change; check with the body before attending.
Latest changes
- Sep 14, 2026 ATC refiles its application for the grid upgrades serving the campus, dropping a Trenton-Saukville line segment and restarting the PSC's six-month review (Port Washington (Lighthouse) Data Center Campus)[1]
- Aug 17, 2026 Oracle moves to voluntarily drop its Ozaukee County Circuit Court lawsuit challenging the Wisconsin PSC's credit rating requirements for data center developers (Port Washington (Lighthouse) Data Center Campus)[2]
- Aug 7, 2026 PSC requires ATC to restart its application for the $1.3B+ transmission line and five substations serving the campus (Port Washington (Lighthouse) Data Center Campus)[3]
- Jul 2026 Oracle credit rating falls to BBB-; PSC rejects We Energies request to reconsider collateral rules; Oracle challenges rules in Ozaukee County Circuit Court (Port Washington (Lighthouse) Data Center Campus)[4]
- Jun 19, 2026 Oracle files petition in Ozaukee County Circuit Court seeking review of the PSC's data center tariff decision (Port Washington (Lighthouse) Data Center Campus)[5]
- Jun 12, 2026 DNR issues air construction and operation permits for 45 diesel emergency generators (Port Washington (Lighthouse) Data Center Campus)[6]
Notes
Planned capacity adds each record’s first published figure for projects not cancelled or denied; projects that publish none are never estimated. IT load is the power reaching computing equipment, so a total that includes it understates total power. Locations may be approximate where a record gives only a town or county. Counts cover tracked projects, not every data center.
Sources
- Wisconsin Watch, “ATC restarts push for grid upgrades serving Port Washington data center”, Sep 15, 2026. https://wisconsinwatch.org/2026/09/wisconsin-port-washington-data-center-atc-restarts-push-grid-upgrades-transmission-utility/
- Wisconsin Watch, “Oracle drops lawsuit challenging Wisconsin data center credit rules”, Aug 17, 2026. https://wisconsinwatch.org/2026/08/oracle-drops-lawsuit-challenging-wisconsin-data-center-credit-rules/
- Wisconsin Watch, “Wisconsin regulators send ATC back to the drawing board on data center connection project”, Aug 7, 2026. https://wisconsinwatch.org/2026/08/wisconsin-psc-regulators-data-center-connection-project-atc-back-to-drawing-board-port-washington/
- Milwaukee Neighborhood News Service, “We Energies says Oracle dispute won't derail Port Washington data center”, Aug 4, 2026. https://milwaukeenns.org/2026/08/04/wisconsin-we-energies-oracle-dispute-port-washington-data-center-on-schedule-legal-challenge-credit-rating/
- Ozaukee County Circuit Court (via WPR), “Oracle America Cloud Services LLC v. Public Service Commission of Wisconsin, petition for review, Case No. 2026CV000256”, Jun 19, 2026. https://www.wpr.org/wp-content/uploads/2026/06/2026CV256.pdf
- Wisconsin Department of Natural Resources, “Port Washington Data Center Proposal”, Jun 12, 2026. https://dnr.wisconsin.gov/topic/EIA/Portwashington.html
Each project record lists all of its sources and excerpts. Cite as: Data Center Census, “Data center fact sheet: Ozaukee County, Wisconsin,” October 14, 2026, https://datacentercensus.com/fact-sheets/wisconsin/ozaukee-county.