MOUNT HARMONY
Substation-AdjacentPrince George's County, Maryland · PJM
At a glance
MOUNT HARMONY is a substation-adjacent datacenter candidate site in Prince George's County, Maryland, scoring 54.5/100 DC Readiness — 35th of 61 scored sites in the county. Its nearest substation is MOUNT HARMONY (0 mi, 69 kV). It sits in the PJM grid region and the SOUTHERN MARYLAND ELEC COOP INC service territory, where interconnection has averaged 5.3 years from request to operation. GridCensus catalogs 50 MW of candidate capacity here.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Incentive detail: Enterprise Zone property tax credits; personal property tax credits on DC equipment.
Site location
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How does MOUNT HARMONY compare with other sites in Prince George's County?
MOUNT HARMONY ranks 35th of 61 scored candidate sites in Prince George's County. Its 54.5/100 is roughly in line with the county average of 56.4. It is roughly in line with the Maryland average of 52.9 and roughly in line with the national average of 53.2.
Against the Maryland average, its strongest sub-score is fiber connectivity (80 vs 72) and its weakest is speed to power (35 vs 36). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is MOUNT HARMONY to power, fiber and other datacenters?
The nearest mapped substation, MOUNT HARMONY, is about 0 miles away and operates at 69 kV. The nearest located transmission bottleneck is POSSUMP4 TX1 XFORMER H 500 KV (PJM), 36 miles away. For connectivity, the nearest internet exchange facility is AiNET DC-900S at 23.5 miles. 9 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is QTS Suitland, 18 miles away.
What are the flood, water and hazard risks at MOUNT HARMONY?
At the county level, FEMA's National Risk Index rates Prince George's County "Relatively Low".
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Prince George's County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BURCHES HILL | Substation-Adjacent | 500 kV | 1,000 MW | 5.3 yrs | 66.9 |
| UNKNOWN162182 | Substation-Adjacent | 500 kV | 1,000 MW | 5.3 yrs | 66.7 |
| BUENA VISTA | Substation-Adjacent | 230 kV | 300 MW | 5.3 yrs | 63.1 |
| RITCHIE | Substation-Adjacent | 230 kV | 300 MW | 5.3 yrs | 63.1 |
| OAK GROVE | Substation-Adjacent | 230 kV | 300 MW | 5.3 yrs | 62.7 |
| PALMERS CORNER | Substation-Adjacent | 230 kV | 300 MW | 5.3 yrs | 62.6 |
| TALBERT TAP | Substation-Adjacent | 230 kV | 300 MW | 5.3 yrs | 62.3 |
| UNKNOWN123510 | Substation-Adjacent | 230 kV | 300 MW | 5.3 yrs | 62.2 |
MOUNT HARMONY: common questions
What is the DC Readiness score of MOUNT HARMONY?
MOUNT HARMONY scores 54.5/100 on the GridCensus DC Readiness scale, rated fair. It ranks 35th of 61 scored sites in Prince George's County. The Prince George's County average is 56.4 and the Maryland average is 52.9.
What is the nearest substation to MOUNT HARMONY?
The nearest mapped substation is MOUNT HARMONY, about 0 miles away, at 69 kV. GridCensus catalogs 50 MW of candidate capacity for the site.
Which electric utility serves MOUNT HARMONY?
SOUTHERN MARYLAND ELEC COOP INC (cooperative) holds the retail service territory that contains the site.
What grid region is MOUNT HARMONY in?
MOUNT HARMONY is in the PJM region. Projects interconnecting there have averaged a 5.3-year wait from queue request to operation.
How far is MOUNT HARMONY from an internet exchange?
The nearest internet exchange facility is AiNET DC-900S, about 23.5 miles away; 9 fiber providers report service at the location.
Related pages
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 October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “MOUNT HARMONY, Prince George's County, MD”, https://gridcensus.com/datacenter-sites/maryland/prince-george-s-county/mount-harmony-4c90d19d (data as of October 10, 2026).
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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