You are looking at : France EuropeFranceAll regions 394 data centers · 55 upcoming projects · edition ofJuly 19, 2026

Fleet figures

What public data says about data centers, aggregated site by site. Every figure is dated, sourced and recomputable.

The figure of this edition — on the selected territory

80%

of the fleet is connected to an already-saturated substation.

The fleet is here. The grid already lacks headroom.

Grid hosting capacity — Caparéseau (RTE) · n = 392 · France · July 19, 2026 · v0.1.0

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France

ⓘ This is not a ranking. It is the photograph of a territory: what it already hosts, what it can still absorb, and what public files actually allow to know.

1. Can you still build here?

The fleet was built on land already taken — but it plugged into a grid with no room left.

80%

of the fleet is connected to an already-saturated substation.

What it meansNew grid connections can become longer, costlier or more uncertain.

Grid hosting capacity — Caparéseau (RTE) · n = 392 · 2 sites with no published value — excluded and counted apart France

45%

of sites sit in a basin under high water stress or water crisis.

What it meansCooling choices become a territorial question, not only a technical one.

WRI Aqueduct 4.0 · VigiEau · n = 389 · 5 sites with no published value — excluded and counted apart France

93%

of the fleet is built on already-artificialized soil — not on farmland or natural land.

What it meansThe fleet grows mostly on already-transformed land — not every new project follows that logic.

Land use — IGN API Carto · n = 394 France

All the figures (3 more)

59%

of sites face a high or critical grid-connection queue.

Connection queues — Caparéseau (RTE) · n = 392 France

35%

of sites border a protected natural area, within one kilometre.

Natura 2000 & ZNIEFF — INPN / IGN · n = 394 France

7%

of sites neighbour a high-hazard industrial site, within 2 km.

Classified installations — Géorisques · n = 394 France

2. What do we really know about the projects?

Operators disclose their capacity — but almost none proves its performance.

55%

of sites disclose their electrical capacity — the basic figure of any public debate.

What it meansThe basic figure of any public debate is usually available.

Operators' public disclosures · n = 394 France

<1%

of sites publish their real energy efficiency (PUE). Claimed efficiency is never proof — publishing is the first step.

What it meansClaimed efficiency is never proof — publishing is the first step.

Operators' public disclosures · n = 394 · 392 sites with no published value — excluded and counted apart France

<1%

of sites declare recovering their waste heat (heat networks, nearby facilities) — the first lever of a good project.

What it meansBetween intention and implementation, the gap remains huge.

Operators' public disclosures · n = 394 · 391 sites with no published value — excluded and counted apart France

3. Where is the fleet heading?

The tracked fleet is already running — but what's coming doesn't always state its capacity.

86%

of the tracked fleet is already operating — we measure what exists, not only what is promised.

What it meansWe measure what exists first, not only what is promised.

ScoreMyDataCenter corpus — project status · n = 394 France

2,884 MW

announced across projects not yet in service (55 projects — 36 do not disclose their capacity).

ScoreMyDataCenter corpus — announced & permitting projects · n = 55 France

29

projects under citizen opposition or moratorium — recorded and sourced, never graded on that basis.

What it meansSourced facts, never a grade — context.

Watch layer — sourced facts, never a grade · n = 29 France

4. What weighs most here?

The territory's constraints, ranked by the share of sites concerned — a descriptive ranking, never a grade.

1

Transparency

100%

of sites do not publish their real efficiency.

2

Power grid

80%

of sites near a saturated substation.

3

Water

45%

of sites in high water-stress areas.

4

Protected areas

35%

of sites within 1 km of a protected natural area.

5

High-hazard sites

7%

of sites within 2 km of a high-hazard industrial site.

recomputed per perimeter: share of sites concerned by each constraint

5. Three projects that tell this territory

A mechanical, published selection — the most common profile, the most constrained, the best documented. Real situations behind the aggregates.

The most common profile

ex-IBM DC / kyndryl ? — Bussy-Saint-Georges (77)

Site gradeC
  • Operational · 3 MW
  • Connected to an already-saturated substation
  • On already-artificialized soil

criterion: the territory's modal profile (status, grid, soil, most frequent grade)

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The most constrained

DATACAMPUS - CASSIN 1 — Chasseneuil-du-Poitou (86)

Site gradeD
  • 5 cumulated territorial constraints
  • Connected to an already-saturated substation
  • In a high water-stress area

criterion: highest cumulated territorial frictions in the perimeter

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The best documented

Campus IA Fouju — Fouju (77)

Site gradeE
  • Documentary confidence: high — 81%
  • Permitting

criterion: highest documentary-confidence score

View the fiche →

6. How to read these figures?

No figure on this page is written by hand.

394sites analysed one by one46%average coverage — the gap is displayed100%recomputable (open data, grid and engine)1same method for every territory100%of figures linked to their sources

Figures change when facts change — never to fit the story.

See the full method →
ScoreMyDataCenter is an independent observatory. No operator funding. No proprietary data. No complacency.