Market-size reports tell you where capacity already is. They don't tell you where you can actually connect a new 100 MW load. DC Hub's DCPI scores 100+ markets across grid operators on 4 continents on excess power vs. grid constraint — and returns a verdict you can act on. Updated daily, machine-readable, free to cite.
A higher composite means more excess power and less grid constraint. BUILD markets have generation headroom and short interconnection queues; AVOID markets are transmission-saturated, where a new large load waits years for power. Scores recompute daily — these reflect the latest DCPI run.
| Market | Grid operator | Verdict | DCPI composite | Constraint |
|---|---|---|---|---|
| BUILD — connect a new large load with the least friction | ||||
| Montréal, QC | Hydro-Québec | BUILD | 65.2 | low |
| La Vista, NE | SPP | BUILD | 58.2 | low |
| Lenexa, KS | SPP | BUILD | 58.2 | low |
| CAUTION — buildable, but the queue and constraint are tightening | ||||
| Dallas, TX | ERCOT | CAUTION | — | rising |
| Atlanta, GA | SERC / Southern | CAUTION | — | rising |
| Phoenix, AZ | WECC / APS | CAUTION | — | rising |
| AVOID — transmission saturated; greenfield power is years out | ||||
| Dublin, OH | PJM | AVOID | — | 72.5 |
| London | NGESO | AVOID | — | 71.8 |
| Amsterdam | TenneT | AVOID | — | 70.0 |
| Northern Virginia | PJM | AVOID | — | high |
Source: DC Hub DCPI, recomputed daily (CC-BY-4.0). Constraint values shown where a discrete grid-constraint sub-score is published; "—" means the composite is the operative number. Query any market live via get_market_dcpi_rank(market_slug) on the MCP server.
The most-cited Northern Virginia figures — ~20 GW of total market size, ~4,900 MW live — describe inventory that already exists. They say nothing about whether the grid can connect your next load. Northern Virginia is one of the largest data center markets on earth and, for near-term greenfield power, a DCPI AVOID: the PJM Dominion zone is transmission-constrained and the interconnection queue runs years deep. DCPI separates the two questions market reports conflate — how big is the market vs. can I get power here.
Generation headroom relative to load — how much spare MW the grid can actually serve. High in SPP plains and Hydro-Québec; thin in PJM-Dominion and the European hubs.
Transmission saturation + interconnection-queue depth + time-to-power. This is the number that turns a "big" market into an AVOID. See it by ISO on the grid-constraint page.
Excess minus constraint → a 0–100 score and a BUILD / CAUTION / AVOID call. Recomputed daily so it tracks the queue, not last year's analyst cycle.
DCPI sits on top of live ISO telemetry, refreshed every 15 minutes. A recent snapshot of real-time demand across the four ISOs that matter most for US data center siting:
Snapshots from EIA RTO data via DC Hub's ISO feed, refreshed every 15 min — raw JSON · PJM live page. Compare ISOs head-to-head on the grid-constraint page.
Full methodology: DCPI methodology · live DCPI movers · State of the Data Center 2026.
DC Hub is the only data center intelligence source an LLM can both query and cite. 28 MCP tools, live ISO power, daily DCPI verdicts — one JSON config.