Utility
ComEd and data centers
5 tracked data center projects in Illinois, 5.93 GW of planned capacity, large-load tariff approved.
Part of Exelon.
Tracked data center projects
| Project | Status | Planned capacity |
|---|---|---|
| Joliet Technology Center Illinois | Approved | 1.8 GW |
| Project Cardinal Data Center Campus Illinois | Approved | 1.8 GW |
| T5 @ Chicago IV Illinois | Approved | 1.55 GW |
| CyrusOne CHI-11 Data Center Campus Illinois | Under construction | 480 MW |
| CloudHQ ORD Campus Illinois | Under construction | 300 MW |
Capacity is the planned figure each project publishes (utility load or IT load as the record notes). Total for proposed, approved, under-construction and operating projects: 5.93 GW. A project served by two utilities counts in full for each.
Large-load tariff and rules
- Status
- Large-load tariff or rules approved (2026-03-19)
- Tariff
- ComEd large-load application/deposit tariff changes (General Terms and Conditions; Rider DE)
- Docket
- 25-0677, Illinois Commerce Commission
- What it says
- The ICC approved ComEd's revised large-load tariff provisions, which set security deposits scaled to project size, and directed staff to open further proceedings on broader large-load questions. (Capitol News Illinois)
Source excerpt
“security deposits for new projects requesting 50-200 megawatts will start at $1 million.”
Official forecasts of data center load
- The ICC order notes ComEd's pipeline of large-load projects and the demand they are expected to draw. (Capitol News Illinois, 2026-03-20)
Source excerpt
“ComEd's pipeline includes more than 75 large-load projects that are expected to draw over 28,000 megawatts.”
What sources say about customer bills
Sources warning that other customers’ costs could rise
- Citizens Utility Board (Illinois consumer advocate): CUB says record PJM capacity auction prices, driven by data center demand, flow into the supply portion of ComEd bills. (Citizens Utility Board, 2026-06-10)
Source excerpt
“This is largely the result of high energy demand caused by new and proposed data centers.”
- Citizens Utility Board: CUB says the PJM market monitor attributed the price spike primarily to data center demand and that ComEd passes capacity costs to customers. (Citizens Utility Board, 2026-06-10)
Source excerpt
“The regulated utility passes supply costs–including capacity payments–onto consumers with no markup.”
These are statements by regulators, utilities, advocates and researchers about this utility or its region. They are not a prediction of any customer’s bill, which depends on rates, usage and regulator decisions.
More
States: Illinois. Look up another utility · All utilities · Power tracker · Energy news · Tax breaks tracker
Cite this page
Last updated Oct 13, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). ComEd and data centers. Retrieved from https://datacentercensus.com/utilities/comed |
|---|---|
| MLA | “ComEd and data centers.” Data Center Census, Oct 13, 2026, https://datacentercensus.com/utilities/comed. |
| Link | https://datacentercensus.com/utilities/comed |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.