Mill Rd, Hempstead
IndustrialNassau County, New York · NYISO
At a glance
Mill Rd, Hempstead is an industrial datacenter candidate site in Nassau County, New York, scoring 54.1/100 DC Readiness — 98th of 130 scored sites in the county. It sits in the NYISO grid region and the LONG ISLAND POWER AUTHORITY service territory, where interconnection has averaged 4.3 years from request to operation.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Risk & environment
Location context
Regulatory climate
First statewide moratorium (2026): 1-yr hold on certain permits for large DCs + impact study.
Moratorium/permit hold targets large datacenters.
Incentive detail: Excelsior Jobs Program tax credits; IDA property tax abatements (PILOT); Empire State Digital Gaming.
Site location
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How does Mill Rd, Hempstead compare with other sites in Nassau County?
Mill Rd, Hempstead ranks 98th of 130 scored candidate sites in Nassau County. Its 54.1/100 is roughly in line with the county average of 57.5. It is roughly in line with the New York average of 54.0 and roughly in line with the national average of 53.2.
Against the New York average, its strongest sub-score is fiber connectivity (95 vs 76) and its weakest is power availability (30 vs 38). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Mill Rd, Hempstead to power, fiber and other datacenters?
The nearest located transmission bottleneck is STEWRTAV 138 VALLYSTR 138 2 (NYISO), 5 miles away. For connectivity, the nearest internet exchange facility is 501 Franklin Ave at 5.7 miles. 12 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is 501 Franklin Ave, 5.7 miles away.
What are the flood, water and hazard risks at Mill Rd, Hempstead?
At the county level, FEMA's National Risk Index rates Nassau County "Relatively High".
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 Nassau County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| DUFFY AVENUE CONVERTER STATION | Substation-Adjacent | 500 kV | 1,000 MW | 4.3 yrs | 70.2 |
| SHORE RD | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 68.8 |
| EAST GARDEN CITY | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.6 |
| NEWBRIDGE ROAD | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.3 |
| TAP141012 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 63.3 |
| ELWOOD | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 62.5 |
| TAP136403 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 62.4 |
| TAP136404 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 62.3 |
Mill Rd, Hempstead: common questions
What is the DC Readiness score of Mill Rd, Hempstead?
Mill Rd, Hempstead scores 54.1/100 on the GridCensus DC Readiness scale, rated fair. It ranks 98th of 130 scored sites in Nassau County. The Nassau County average is 57.5 and the New York average is 54.0.
Which electric utility serves Mill Rd, Hempstead?
LONG ISLAND POWER AUTHORITY (state) holds the retail service territory that contains the site.
What grid region is Mill Rd, Hempstead in?
Mill Rd, Hempstead is in the NYISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
How far is Mill Rd, Hempstead from an internet exchange?
The nearest internet exchange facility is 501 Franklin Ave, about 5.7 miles away; 12 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, “Mill Rd, Hempstead, Nassau County, NY”, https://gridcensus.com/datacenter-sites/new-york/nassau-county/mill-rd-hempstead-7eba2bb0 (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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