New York's ISO lags national buildable-market benchmarks; average constraint index 47.3 signals moderate grid stress across upstate and metro footprints
## NYISO Grid Position
NYISO hosts 10 data-center markets tracked in the DC Hub Power Index, with an average excess-power score of 21.7 and average constraint index of 47.3 as of June 15, 2026. That excess figure sits well below the national median for Tier 1 buildable markets (typically 35–50) and trails WECC leaders like Cheyenne, WY (excess 69.5) by a factor of three.
The 47.3 constraint reading places NYISO in the middle tier of grid stress — less severe than PJM's Dublin, OH (constraint 72.5) but materially worse than SPP's rural zones (constraint 22.5). For developers sizing 50+ MW campuses, this translates to longer interconnection timelines and higher substation-upgrade costs than in Western or Southwest markets.
## What It Means for Site Selection
NYISO's modest excess-power average reflects two structural headwinds: aging transmission in the Hudson Valley and limited gas-peaker headroom downstate. Upstate markets (Albany, Syracuse corridors) offer better land economics but face the same queue congestion that has pushed PJM timelines past 36 months. Developers chasing 2027 energization are increasingly bypassing New York for ERCOT's unregulated build or SPP's expedited renewable hookups.
The second-order read: NYISO's moderate constraint score makes it a plausible hedge market for enterprises that must stay East Coast but cannot stomach Northern Virginia's >70 constraint zones. Expect colocation providers to lock incremental capacity in White Plains and Poughkeepsie as a operational-redundancy play, not a growth engine.
## Methodology
DC Hub's excess and constraint indices synthesize real-time ISO queue data, utility planning documents, substation headroom, and fiber/gas co-location. Scores update daily.
**Source:** DC Hub Data Center Power Index (https://dchub.cloud/dcpi). Updated daily.
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