Maryland also commissioned a study of the sector’s impact on air, water, the Chesapeake Bay, and the power grid, with results due September 1, 2026
The Breaking Point
For years, data center siting decisions in the Mid-Atlantic played out quietly in permitting offices and utility interconnection queues. That changed when a proposal to redevelop the shuttered Landover Mall into a hyperscale campus drew sustained community opposition in Prince George’s County. The backlash was specific and local — noise, air quality, water use, neighborhood character — but the underlying grievance was about utility bills. Residents were already absorbing rate increases tied to grid infrastructure serving the massive Northern Virginia data center corridor across the Potomac, and they were being asked to host more of the same.
On July 9, 2026, the County Council responded with a two-year moratorium on new data center development — the longest such pause adopted anywhere in Maryland. The Council Chair, who publicly supports a full ban, described the moratorium as the maximum political agreement the council could reach. That framing matters: the floor of political resistance in this market is higher than most operators have priced into their site selection models.
Where the Shift Accelerated
Prince George’s County did not move in isolation. Montgomery, Frederick, and Baltimore County each paused data center development in the weeks prior. Maryland also commissioned a study of the sector’s impact on air, water, the Chesapeake Bay, and the power grid, with results due September 1, 2026. A state data center registry — the first of its kind in the country, according to state lawmakers — was created in the last General Assembly session to track energy and water use and surface duplicate interconnection filings, though it does not take effect until January 2027.
The regulatory architecture being assembled operates on two tracks simultaneously, and neither is complete. Distribution-level cost allocation falls under the Maryland Public Service Commission, which is still drafting data center-specific rules. Transmission, capacity, and energy costs fall under federal jurisdiction, where FERC has ordered grid operators to propose reforms that are not yet finalized. Maryland’s People’s Counsel — the office representing residential ratepayers — has stated explicitly that moratoriums are useful precisely because they buy time to close those gaps before new load is added. That position now has legislative and executive cover across most of the state’s major counties.
What makes Prince George’s County significant is scale: it is Maryland’s second-largest county, it sits within the same PJM regional grid that serves the Northern Virginia hyperscale corridor, and its Council Chair is on record favoring a permanent ban. The two-year window is a negotiated floor, not a ceiling.
Where This Hits Global Heads of Data Center Energy
The direct operational consequence is site compression in the greater DC metro region. PJM interconnection queue positions tied to Prince George’s County assets face permit uncertainty for at least two years, with no guarantee that the post-moratorium regulatory framework will be materially more permissive. Any project in the county’s pipeline that has not yet received a building or use permit should be treated as paused, not merely delayed.
The subtler consequence is cost-allocation exposure. The explicit political logic behind these moratoriums is that data center operators should bear the full cost of the grid infrastructure their load requires, rather than socializing it across the residential rate base. When Maryland’s PSC finalizes its data center cost-allocation rules — and when FERC’s ordered reforms take effect — operators in PJM markets should expect the all-in cost of new load to rise. The moratoriums are buying time for those rules to land before new capacity is added, which means the post-moratorium regulatory environment is likely to be more expensive than the pre-moratorium one, not equivalent.
The state’s new data center registry, effective January 2027, introduces another layer of operational visibility. Designed in part to surface “phantom load” — developers filing interconnection requests in multiple jurisdictions for the same notional capacity — the registry will bring new scrutiny to parallel-filing strategies across Maryland and adjacent PJM zones within 18 months.
What Could Still Change the Read
The September 1 state study is the most significant near-term variable. If it quantifies grid impact in a way that supports tighter statewide restrictions, it gives the General Assembly a data foundation for legislation that goes beyond county-level zoning. Conversely, if the study surfaces grid or economic benefits — tax revenue, load flexibility, demand response participation — it could moderate the legislative posture heading into the next session. The outcome is genuinely open.
Federal regulatory timing is the second variable. The Council Chair noted explicitly that grid costs do not respect county lines and that national-level regulation is necessary for equity across jurisdictions. If FERC moves faster than expected on cost-allocation reform, it could defuse some of the rate-impact arguments driving county-level action. If FERC moves slowly, county and state restrictions are likely to intensify.
There is also a legal question the available evidence does not resolve: whether county-level development moratoriums can withstand challenge on preemption grounds, particularly where they interact with federally regulated transmission infrastructure. No litigation timeline is confirmed.
The Question This Leaves Your Team
The moratoriums across Maryland are being built explicitly to buy time for cost-allocation rules that will make data center load more expensive to add. The two-year window in Prince George’s County runs concurrent with state study results, PSC rulemaking, and FERC reform timelines.
The question your team needs to answer now: which of your Mid-Atlantic interconnection queue positions assume a regulatory environment that will not exist by the time construction could begin, and what is the revised all-in cost assumption if Maryland’s post-moratorium framework looks more like what the People’s Counsel is advocating than what operators currently model?
Sources
- Insideclimatenews — Maryland County Adopts a Two-year Moratorium on Data Center Development (Link)
