Key takeaways

• Modo now tracks more than 2,000 data center facilities nationwide. This includes over 1,200 planned or operating sites in PJM, concentrated among the Dominion (DOM), AEP, ComEd, and PPL utilities.
• Just four utilities (and their four PJM zones: DOM, AEP, ComEd, and PPL), represent 84% of the load PJM's data center forecast through 2030.
• 8.2 GW of data centers were already operating across PJM in 2025, and utilities have another 41 GW under contract or construction.
• Utilities have included another 71 GW in their forecasts that sits somewhere between engineering review and the earliest inquiry stage. The concentrated nature of this buildout means that tracking utilities will show the data center buildout before PJM-level statistics.

Data centers in PJM are highly clustered.

• Northern Virginia served by DOM
• Central Ohio served by AEP
• Chicago served by ComEd
• Pennsylvania served by PPL

State tax exemptions and Virginia's early fiber buildout explain why these hubs formed. Northern Virginia's cluster started with an internet exchange point built in Loudoun County in the 1990s. reports that a dense fiber network, reliable low-cost energy, and available land then drew data centers to build around it. Virginia added a sales-and-use tax exemption for data center equipment in 2008, one of the earliest states to do so.