NTT Global Data Centers Americas, Inc. Loudoun County, Virginia
QA status Release dated July 29, 2026
EVIDENCE NOTE
What the public record says A manually verified transcription of equipment groups and permit limits stated in Virginia DEQ permit 74120-7, with one-based PDF page citations. Permitted terms do not establish actual operation or emissions.
What this record does not establish The source confirms the document and its stated fields. This profile does not infer actual emissions, compliance history, operating status, facility capacity or environmental impact where those facts are not established by the cited document.
How to read the status Issued means the agency granted the permit subject to its conditions. It does not mean every permitted unit is operating, that maximum permitted emissions occur, or that later amendments do not exist.
DOCUMENT FIELDS
Permittee named in document NTT Global Data Centers Americas, Inc.
Permit number 74120-7
Permit action permit amendment
Document date July 11, 2025
Facility address VA3, 44245 Gigabit Plaza; VA4, 44760 Gigabit Plaza; VA5, 44761 Gigabit Plaza; VA6, 44495 Gigabit Plaza; VA7, 44395 Gigabit Plaza; Ashburn, VA 20147
Application complete 2025-07-10
Explicitly supersedes 2022-11-17
Locality Loudoun County
Regional office Northern Regional Office
Regulator Virginia Department of Environmental Quality VERIFIED PERMIT TERMS
Equipment and limits, This is a conservative transcription of reviewed permit sections, not an exhaustive legal digest. Page numbers refer to the one-based position in the linked PDF. Blank values are not zero.
Permitted equipment 9 document-defined equipment groups. Counts and per-unit ratings are transcribed; combined capacity is not calculated.
Reference Equipment / model Count / rating Fuel / controls Stated operating field Source VA7emergency engine-generator set Cummins · QSK95-G12 24 units 3250 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 5 ↗ , p. 10 ↗ Gen7Hemergency engine-generator set Cummins · QSK50-G5 1 units 1500 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 5 ↗ , p. 10 ↗ VA3emergency engine-generator set Kohler · KD45V20 25 units 1500 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 5 ↗ , p. 10 ↗ Permit states de-rated capacity. VA4emergency engine-generator set Kohler · KD83V16 20 units 3250 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 5 ↗ , p. 10 ↗ Gen4Hemergency engine-generator set Kohler · KD45V20 1 units 1500 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 6 ↗ , p. 10 ↗ Permit states de-rated capacity. VA5emergency engine-generator set Kohler · KD83V16 20 units 3250 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 6 ↗ , p. 10 ↗ Gen5Hemergency engine-generator set Kohler · KD45V20 1 units 1500 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 6 ↗ , p. 10 ↗ Permit states de-rated capacity. VA6emergency engine-generator set Cummins · QSK95-G12 16 units 3250 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 6 ↗ , p. 10 ↗ Gen6Hemergency engine-generator set Cummins · QSK50-G5 1 units 1500 kW each diesel — 500 hours hours/year for all purposes; no single unit p. 6 ↗ , p. 10 ↗
Operating scope Authorized hours, time windows or an explicit finding that no numeric annual-hour cap was located in the reviewed sections.
Reference Limit Basis Source VA7500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 5 ↗ , p. 10 ↗ Gen7H500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 5 ↗ , p. 10 ↗ VA3500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 5 ↗ , p. 10 ↗ VA4500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 5 ↗ , p. 10 ↗ Gen4H500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 6 ↗ , p. 10 ↗ VA5500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 6 ↗ , p. 10 ↗ Gen5H500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 6 ↗ , p. 10 ↗ VA6500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 6 ↗ , p. 10 ↗ Gen6H500 hours/year hours/year for all purposes; no single unit Permitted operating-hours field transcribed in the verified pilot equipment table. p. 6 ↗ , p. 10 ↗
Permitted emission limits 5 pollutant, unit-group and limit rows. These are permit terms, not measured or actual emissions.
Inspect 5 transcribed limit rows Reference Pollutant Limit Basis / scope Source VA3NOx as NO2 — 11.25 tpy annual group total — p. 13 ↗ VA4 and Gen4HNOx as NO2 — 20.85 tpy annual group total — p. 13 ↗ VA5 and Gen5HNOx as NO2 — 20.85 tpy annual group total — p. 13 ↗ VA6 and Gen6HNOx as NO2 — 16.96 tpy annual group total — p. 13 ↗ VA7 and Gen7HNOx as NO2 — 23.29 tpy annual group total — p. 13 ↗
DOCUMENT HISTORY
What this document says it changes permit amendment Explicitly supersedes the document dated 2022-11-17.
p. 3 ↗ , p. 4 ↗ QA NOTES
Ambiguity stays visible Official PDF cover/permit heading checked in the manual second pass. Value transcribed from official permit equipment/condition table; no totals calculated. Permit states de-rated capacity. — Value transcribed from official permit equipment/condition table; no totals calculated. Directly stated permitted limit; not an actual emissions value.