Where the Instrument Stops: Virginia's Groundwater Ceiling, Its Grandfathered Rivers, and the Load Outside Both
DEQ said it in the SJ 25 study: the strip of Coastal Plain sediment west of Interstate 95 "is disregarded, and I-95 is treated as the approximate western edge of the VCP aquifer system." Virginia drew its regulatory boundary at the same road and regulates as though it were real.
Virginia regulates groundwater east of a highway. The Department of Environmental Quality said so in its own words in the SJ 25 study: the strip of Coastal Plain sediment lying west of Interstate 95 "is disregarded, and I-95 is treated as the approximate western edge of the VCP aquifer system." The Commonwealth drew a regulatory boundary at the same road, and regulates as though it were real.
This executive brief crosses the three deposited volumes in the Virginia Data Center Reports water series and carries the four findings that none of them makes alone. It is organised on the three functions of SJ 25: what the study establishes, what follows where the model reaches, and what is absent where it stops.
Finding 1. Across 726 entity-bearing claims in the three volumes, four subjects carrying twenty or more claims are engaged near-evenly by all three. Three of the four are places; SJ 25 is the only document. Every institution of comparable weight is owned outright by a single volume.
Finding 2. DEQ tested nine sites and none passed at three million gallons a day. Of 286 inventoried data center facilities, 257 sit outside every declared groundwater management area, and in the northern crescent the nearest facility to Interstate 95 is 12.7 kilometres away. The flow model that produced the eastern numbers runs from Stafford south.
Finding 3. Fairfax Water's two treatment plants withdrew a combined 164.0 million gallons a day in 2024, both unpermitted under the exclusion for withdrawals in existence on 1 July 1989, against Caroline County financing a 9.0 MGD Rappahannock intake carrying a fifteen-year term, no extension, and a drought curtailment ladder, because DEQ's model says the aquifer beneath it yields 60,000 gallons a day.
Finding 4. Between the October 2024 and December 2025 editions of DEQ's Annual Water Resources Report , Prince William County's reported surface water withdrawal falls from 69.74 to 2.15 million gallons a day, a 97 percent drop accounted for almost entirely by one treatment plant being relabelled into Fairfax. Corbalis WTP at 94.6 million gallons a day appears in two tables of the December 2025 report and in no locality's row of a third.
Forty-four graded endnotes, three figures, and a routing table directing the reader to the volume that answers a given question. Evidence current to 26 August 2026. Prepared entirely from public sources, including both editions of the Commonwealth's Annual Water Resources Report read against the documents themselves.
Disclosure. In July 2026 the author was named to the advisory board of "Data Centers and the Southern Energy Buildout," a 2026-2029 study at Emory University funded by the Alfred P. Sloan Foundation. This brief was prepared independently and entirely from public sources. The Sloan Foundation and Emory University did not commission it, fund it, supply data to it, review it, or see its findings in advance.