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Gridcensus

PJM Datacenter Sites

PJM Interconnection

At a glance

PJM (PJM Interconnection) contains 31,769 of the 147,272 datacenter candidate sites GridCensus scores — 22% of the national total and the largest of 9 grid regions by site count. Its sites average 51.9/100 on the DC Readiness Score (national average 53.0), the 7th-highest of 9 regions. Projects near these sites wait an average of 4.2 yrs in the interconnection queue.

PJM coordinates the grid across 13 mid-Atlantic and Midwest states. It contains the world's densest datacenter cluster (Northern Virginia's 'Data Center Alley'), and its interconnection queue is the most closely watched speed-to-power constraint in the country.

31,769
Candidate sites
51.9/100
Avg DC Readiness
847.2k MW
Catalogued capacity
theoretical aggregate
4.2 yrs
Avg queue wait

How does PJM compare with other grid regions?

By site count PJM is the largest of 9 regions GridCensus tracks, with 31,769 candidate sites. Its average DC Readiness of 51.9 is the 7th-highest of 9, below the 53.0 national average. The average interconnection-queue wait of 4.2 yrs is the 5th-shortest of 9. Sites here see an average queue depth of 64 projects at their nearest point of interconnection. Catalogued substation capacity near these sites sums to 847.2k MW, a theoretical aggregate rather than available headroom.

Which states and site types make up PJM?

Pennsylvania (6,493 sites, 20%), Virginia (5,728 sites, 18%) and Kentucky (5,088 sites, 16%) hold the largest shares of the region's candidate sites. By type, former mine sites make up 40% (12,623; 18% nationally), industrial sites make up 20% (6,253; 24% nationally) and substation-adjacent sites make up 14% (4,518; 26% nationally).

Member states

By site type

What are PJM sites strongest and weakest on?

PJM is strongest on water, averaging 89.0 against a national average of 72.3; its weakest factor is speed to power, at 39.6 versus 50.0 nationally. Each factor is scored 0–100, where higher is better (for water and hazard, higher means lower stress and lower risk).

Power availability
34.5
Speed-to-power
39.6
Fiber
69.0
Water
89.0
Hazard resilience
70.2

Top 25 datacenter sites in PJM

Top datacenter sites in PJM
SiteTypeStateCountyVoltageCapacityQueue waitScore
SAYREVILLESubstation-AdjacentNJMiddlesex County500 kV1,000 MW2.7 yrs71.3
RED LIONSubstation-AdjacentDENew Castle County500 kV1,000 MW1.5 yrs70.8
KEENEYSubstation-AdjacentDENew Castle County500 kV1,000 MW1.5 yrs70.8
SEWARENSubstation-AdjacentNJRichmond County230 kV300 MW2.7 yrs70.3
UNKNOWN122269Substation-AdjacentILCook County345 kV600 MW4.8 yrs70.3
PIERCESubstation-AdjacentOHCampbell County345 kV600 MW5.2 yrs70.2
OLIVESubstation-AdjacentINSt. Joseph County345 kV600 MW3.0 yrs70.2
CROMBYSubstation-AdjacentPAMontgomery County230 kV300 MW3.6 yrs70.0
UNKNOWN172520Substation-AdjacentNJHudson County230 kV300 MW2.7 yrs69.9
BRAMBLETONSubstation-AdjacentVALoudoun County500 kV1,000 MW5.1 yrs69.8
UNKNOWN132611Substation-AdjacentNJRichmond County230 kV300 MW2.7 yrs69.7
ELMONTSubstation-AdjacentVAHanover County500 kV1,000 MW5.1 yrs69.6
GOOSE CREEKSubstation-AdjacentVALoudoun County500 kV1,000 MW5.1 yrs69.5
UNKNOWN121936Substation-AdjacentILKenosha County345 kV600 MW4.8 yrs69.5
CHESAPEAKE ENERGY CENTERSubstation-AdjacentVAChesapeake city230 kV300 MW5.1 yrs69.4
UNKNOWN113613Substation-AdjacentOHLucas County345 kV600 MW5.2 yrs69.3
UNKNOWN124436Substation-AdjacentILCook County345 kV600 MW4.8 yrs69.3
CHICKAHOMINYSubstation-AdjacentVAHenrico County500 kV1,000 MW5.1 yrs69.2
McKees Solar ParkBrownfieldDENew Castle—0 MW1.5 yrs69.2
EDDYSTONESubstation-AdjacentPADelaware County230 kV300 MW3.6 yrs69.2
CLIFTONSubstation-AdjacentVAManassas Park city500 kV1,000 MW5.1 yrs69.1
CHESTERFIELDSubstation-AdjacentVAHenrico County230 kV300 MW5.1 yrs69.0
YADKINSubstation-AdjacentVAChesapeake city500 kV1,000 MW5.1 yrs69.0
BRUNOT ISLANDSubstation-AdjacentPAAllegheny County345 kV600 MW3.6 yrs69.0
MOSBYSubstation-AdjacentVAManassas Park city500 kV1,000 MW5.1 yrs68.9

PJM FAQ

What is PJM?

PJM Interconnection (PJM) PJM coordinates the grid across 13 mid-Atlantic and Midwest states. It contains the world's densest datacenter cluster (Northern Virginia's 'Data Center Alley'), and its interconnection queue is the most closely watched speed-to-power constraint in the country.

How many datacenter sites are in the PJM region?

GridCensus catalogs 31,769 scored datacenter candidate sites in PJM, averaging 51.9/100 DC Readiness — 22% of all sites scored nationally.

What is the average interconnection-queue wait in PJM?

Candidate sites in PJM average a 4.2 yrs queue wait with an average queue depth of 64 projects, the 5th-shortest of 9 regions.

Which state has the most PJM datacenter sites?

Pennsylvania has the most, with 6,493 scored sites (20% of the region), followed by Virginia with 5,728.

What is the highest-scoring datacenter site in PJM?

SAYREVILLE in Middlesex County, New Jersey scores 71.3/100, the highest DC Readiness Score in the region.

Other grid regions

Related rankings and tools

Dataset updated . Screening estimates derived from public data sources.

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “PJM datacenter candidate sites”, https://gridcensus.com/iso/pjm (data as of November 12, 2026).

Go deeper than the public screen

Every site and score for PJM is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.

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