Pillar sub-scores
A pillar mixes what is endured and what is chosen; a grade is not the average of the pillars. Energy
Energy
●●●● Missing: PUE (announced energy efficiency), Waste-heat recovery — commitment.
Water
Water
●●●● Missing: Cooling technology + announced water volume.
Land & biodiversity
Land & biodiversity
●●●○ Missing: Ecological corridors (TVB), Site ground footprint, Avoid-reduce-offset (ERC) measures, Designated for urbanisation in a supra-municipal plan, Planning-document compatibility procedure under way.
Local impact
Local impact
●○○○ Missing: Absorption capacity (project size vs municipality), Announced jobs, Announced tax revenue, Observed level of opposition, Elected officials' position (voted facts only).
Transparency & governance
Transparency & governance–
“Rated C on site, but D on “Energy”.”
This site is among the 80% of the fleet connected to an already-saturated substation. Fleet figures →
This site is in France — the country's site index: C (55.9). See the country index →
What the environmental case file states
2021-11-18 · 19 pages · read the opinion (PDF)
Energy and heat
Grid connection voltage225 kVp.2
Le projet nécessite la création d’une double liaison électrique souterraine à très haute tension (225 kV) d’une longueur de 2,5 km, reliant le site du projet au poste du réseau de transport d’électricité (RTE) « Cormeilles », localisé à 1 km du site à vol d’oiseau .
On-site photovoltaics (as reported)3 values
130 panneaux · 505 m2 · 44 kWcp.8Le projet prévoit aussi d’installer sur le s toitures des trois bâtiments 130 panneaux photovoltaïques d’une surface d’environ 505 m2 et d’une puissance totale d’environ 44 kWc.
Water and cooling
Cooling technologyclosed_loopp.13
Les émissions dues aux opérations de dépotage des cuves de fioul domestiques sont estimées comme étant très faibles, tout comme celles des dispositifs de refroidissement (circuit fermé).
Refrigerant (designation)2 values
R410 · R1234zep.12l’hexafluorure de soufre (SF 6), utilisé comme isolant dans les transformateurs, et le R410 A et R1234ze, des fluides frigorigènes de type hydrofluorocarbones (HFC) utilisés pour les groupes froids.
Generators and fuel
Backup generators (count)22 groupesp.2
L’alimentation de secours du site est assurée par 22 groupes électrogènes d’une puissance électrique d’environ 232 MW, alimentés au fioul (stock de 713 tonnes).
Backup generator fuelfuel_oil_or_dieselp.2
L’alimentation de secours du site est assurée par 22 groupes électrogènes d’une puissance électrique d’environ 232 MW, alimentés au fioul (stock de 713 tonnes).
Fuel tanks (count)9 cuvesp.7
un bâtiment abritant 22 groupes électrogènes de secours, répartis sur trois étages, permettant une autonomie de 52 h en cas de coupure électrique prolongée, alimentés par neuf cuves à fioul enterrées (total de 810 m3/713 t) ;
Backup autonomy52 hp.7
En cas de défaillance de l’alimentation électrique, des groupes électrogènes de secours, alimentés en fioul, sont chargés de prendre le relais et permettent une autonomie électrique du site pendant 52 heures (« bâtiment groupes électrogènes » dans le plan masse, figure 4).
Neighbourhood
Distance to nearest sensitive site40 mp.2
compléter les mesures visant à réduire le risque d’exposition à des pollutions sonores trop élevées pour les habitations et l’école situées à 40 m du site, notamment en période diurne ;
Employment
Reported on-site headcount30 personnesp.2
justifier de la création de 147 places de stationnement pour toute ou partie imperméabilisées alors que le projet prévoit 30 emplois directs et que d ’autres modes d’accès que la voiture particulière sont à envisager.
Measured noise
| Measure | Day | Night |
|---|---|---|
| Recorded levelsp.13 | — | — |
Les principaux résultats, présentés dans l’étude d’impact (p. 120), indiquent que l’exposition sonore actuelle est comprise entre 48 dB(A) et 60 dB(A) de jour et entre 44,5 dB(A) et 60 dB(A) de nuit.
Other levels cited in the opinion
55 dB(A)« La MRAe remarque qu’en l’état actuel, les niveaux sonores ambiants mesurés en limite de site et dans les zones à émergence réglementée (ZER) 12 ne sont pas conformes au plan de prévention du bruit de l’environnement qui prévoit que le site soit limité à une exposition sonore maximale de 55 dB(A). »p.13
State recorded in the impact assessment, before operation.
Tracked indicators
| Indicator | Value | Reading | State | Source |
|---|---|---|---|---|
| Energy | ||||
| Local grid carbon intensity How much CO₂ is emitted to produce the electricity the site will consume, based on the regional grid. The lower the value, the better. | 17.6 gCO2e/kWh | Measured | RTE eCO2mix (données définitives) — France national CO2 intensity, 12-month mean 2025-07-30..2026-04-30 (17.6 gCO2/kWh, n=13196 half-hourly) — accessed 2026-07-30 | |
| Grid connection capacity / proximity How easily the site can be connected to the power grid: available capacity and distance to the nearest substation. | grid saturated at the connection point | Measured | Caparéseau (RTE S3REnR) — poste CORMEILLES at 0.9 km: 0.0 MW available hosting capacity (updated 27/06/2026) — accessed 2026-07-14 | |
| Grid congestion / connection queue How congested the local grid is: the more saturated, the more the connection competes with other users. | critical local grid congestion | Measured | Caparéseau (RTE S3REnR) — poste CORMEILLES at 0.9 km: 100.0% reserved-capacity fill rate (updated 27/06/2026) — accessed 2026-07-14 | |
| PUE (announced energy efficiency) The announced energy efficiency: total electricity used versus what actually powers computing. Closer to 1 is better. The lower the value, the better. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Heat-network connectability Whether the site can valorise its waste heat via a district-heating network: distance to the nearest network and presence of a connection obligation (priority development perimeter). | connectable to an existing heat network | Measured | France Chaleur Urbaine (data.gouv, lov2) — réseau de chaleur le plus proche : 143 m (point→segment, Lambert 93) ; dans un PDP : oui ; réseau classé : oui → raccordable (≤300 m) — accessed 2026-09-30 | |
| Waste-heat recovery — commitment Operator commitment level to valorise the site's waste heat (delivered / signed contract / study / intention / none). | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Water | ||||
| Local water stress Water tension in the area: in an already water-scarce region, withdrawals weigh more heavily. | high water stress | Measured | VigiEau — drought-restriction status at point (accessed 2026-07-14) — accessed 2026-07-14 | |
| Water body status The ecological health of the affected river or aquifer, per the EU classification (from 'high' to 'bad'). | water body in good status | Measured | EEA WISE (WFD 2022) — water body FRHR155B 'la Seine du confluent du Ru d'Enghien (exclu) au confluent de l'Oise (exclu)': ecological status class 2/5 — accessed 2026-07-14 | |
| Basin withdrawal pressure How intensively water is already withdrawn from the basin: a heavily-tapped basin ill affords a new user. | low abstraction in the basin | Measured | Hub'Eau BNPE — commune 95018: 0.006 Mm3 withdrawn in 2023 (all uses, provisional pressure band) — accessed 2026-07-14 | |
| Cooling technology + announced water volume The cooling technology chosen and the water volume it will consume, as announced by the operator. | Not disclosed | — | Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. | Avis de l'autorité environnementale — lecture d'absence — accessed 2026-10-14 |
| Land & biodiversity | ||||
| Overlap / distance to protected areas How close the project is to protected natural areas (Natura 2000, nature reserves…). | protected natural area 1–5 km away | Measured | INPN / IGN API Carto — Natura 2000 & ZNIEFF overlap by distance ring — accessed 2026-07-14 | |
| Soil status (artificialized / natural / agricultural) What the land was before: already built (brownfield), natural, or farmland — sealing farmland or nature weighs most. | previously developed land | Measured | IGN API Carto GPU — PLU zoning 'UAi7c5' — accessed 2026-07-14 | |
| Ecological corridors (TVB) Whether the project severs a wildlife corridor (green-and-blue network). | Not disclosed | — | Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. | — |
| Site ground footprint The SITE's ground footprint in hectares — the land the project takes up (buildings, roads, parking, substation, retention basins), not the building print alone: the larger, the greater the land impact. The lower the value, the better. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Avoid-reduce-offset (ERC) measures Measures to avoid, reduce or offset harm to soil artificialisation and biodiversity. (Heat recovery moved to E6/E7, Energy pillar.) | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Designated for urbanisation in a supra-municipal plan not scored · contextual fact Is the site designated for urbanisation in a planning document above the municipality? A contextual fact, published as such: it neither improves nor worsens the grade. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Planning-document compatibility procedure under way not scored · contextual fact Is a procedure under way to make the planning document compatible with the project? A contextual fact: we follow the instrument, not the intention — the land status only changes the day the procedure completes. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Local impact | ||||
| Municipality socio-economic profile The host town's social profile. A safeguard: a project must never improve its grade by locating in a vulnerable town. | municipality's social profile: fragile | Measured | INSEE Filosofi (via data.gouv) — commune 95018: median disposable income 19350 €/consumption unit — accessed 2026-07-14 | |
| Absorption capacity (project size vs municipality) The project's size relative to the town: a very large project in a small town disrupts more. The lower the value, the better. | Not disclosed | — | Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. | — |
| Technological hazard / nearby Seveso sites The presence of hazardous industrial sites (Seveso) nearby, adding risk to the surroundings. | a Seveso establishment on record within 5 km | Measured | Géorisques — classified installations (Seveso status) within 5 km — accessed 2026-07-14 | |
| Announced jobs The number of permanent jobs announced, relative to project size. More is better. The higher the value, the better. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Announced tax revenue The tax revenue the project would bring to the town, as announced. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Observed level of opposition The scale of observed opposition: appeals, petitions, mobilizations reported by the press. | Not disclosed | — | Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. | — |
| Elected officials' position (voted facts only) Elected officials' position as expressed by official votes only (council decisions), with no personal judgment. | Not disclosed | — | Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. | — |
| Transparency & governance | ||||
| Consultation / consent / governance (procedural proxies) The quality of the democratic process: public inquiry held, environmental authority opinion, appeals, CNDP referral. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
| Documentation transparency / file availability How genuinely accessible the project's file is to the public: published studies, figures and commitments. | — | — | Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. | — |
Operator response
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State of the available data
26 indicators tracked · 11 measured · 0 announced (unverified) · 5 absent from the file · 10 not looked for yet.
Grade history
Methodology 0.3.0 scoremydatacenter.org