Coverage milestone puts every major US and European grid zone on a single shortlist, with Rural SPP and WECC markets holding the highest build scores.
## Highlights
DC Hub's Data Center Power Index now covers **311 markets across 7 interconnected grid operators** — ERCOT, PJM, CAISO, SPP, MISO, WECC, and international zones including NGESO and ENTSOE-NL. The full dataset was indexed as of June 25, 2026.
**Cheyenne, WY** leads the DCPI excess-power ranking at 69.5, followed by Rural SPP (Kansas) at 67.2. Both markets sit inside the WECC and SPP footprints, where long-haul transmission and low local load create structural surpluses. At the other end, **Dublin, OH** scores 22.4 excess against a 72.5 constraint score — a PJM subzone where interconnection queues and substation capacity are both saturated. London (NGESO) and Amsterdam (ENTSOE-NL) trail at 13.5 and 13.7 respectively, reflecting Europe's tighter grid and higher baseline demand.
## What it means
For site-selection teams, 311 markets is the reference set: every hyperscale-viable zone in North America and Europe now carries a live, comparable score. A developer evaluating rural WECC can benchmark Cheyenne's 69.5 against Phoenix's mid-50s or compare PJM's Dublin bottleneck to Northern Virginia's 40–45 range. The index removes the need to run separate grid studies for each ISO — constraint and excess are normalized, updated daily, and routed through a single API.
The second-order read: markets below 30 excess are no longer "hard but doable" — they are structural avoid zones unless you control existing capacity or have a decade-long interconnection agreement. Cheyenne and Rural SPP are where the next 500 MW finds power in 18–24 months, not 5 years.
## Methodology
The DCPI scores 0–100 on two axes: **excess power** (generation headroom, transmission access, low local load) and **constraint** (interconnection queue depth, substation capacity, regional consumption growth). A market with 65+ excess and sub-30 constraint is a Tier-1 build candidate. The index updates daily with live ISO data, facility additions, and county-level infrastructure changes.
**Source:** DC Hub Data Center Power Index (https://dchub.cloud/dcpi). Updated daily.
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