How clean is the grid behind Cardiff DC?

Cardiff DC runs on United Kingdom's grid, which was 217 gCO₂/kWh and 64% clean in 2025 (Ember).

Where is Cardiff DC located?

Cardiff DC is in United Kingdom.

Proposed

Cardiff DC

United Kingdom

Cardiff DC is a proposed data center in United Kingdom. It runs on United Kingdom's grid, which was 36% fossil-fuelled at 217 gCO₂e/kWh in 2025 (Ember).

Reporting by Eric Keller · Updated Jun 12, 2026

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Campaign · Decision pending

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supporters

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Your action kit

Sourced arguments and ready-to-send letters — every figure links to a primary record. Edit to add your own story.

Process

Demand a full, public review — not a rubber stamp.

Ask for an independent noise study, a water-and-power impact assessment, enforceable conditions (setbacks, hours, cooling type), and that the record stays open for written comment. Procedural shortcuts have voided approvals elsewhere.

Public comment (editable)

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Records / FOIA request

Public Records Request

To the records custodian for the jurisdiction,

Under the applicable public-records law, I request copies of the following records concerning the data-center project known as "Cardiff DC":

1. The complete application, including any rezoning, special-use/conditional-use permit, or site-plan submissions and all exhibits.
2. All staff reports, analyses, and recommendations.
3. Any traffic, noise, water-use, stormwater, or utility/load studies submitted or commissioned.
4. Any development agreement, proffers, or tax-incentive/abatement agreements and their term sheets.
5. All correspondence between the applicant (or its agents) and county/city staff or elected officials regarding this project.
6. Notices of public hearings and proof of required public notice.

I request these in electronic form where available. If any portion is withheld, please cite the specific exemption. If fees will exceed $25, please contact me first.

Thank you,
[Your name]
[Your email / address]

Edit freely before sending — it's a starting point. Add your own story; personal comments carry the most weight.

Join the campaign

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Neighbors taking a stand

Be the first to say why this matters. Public notes appear here to show officials the strength of local feeling.

Real parent

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Operator

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Grid carbon

217 gCO₂/kWh

Clean electricity

64%

Region

United Kingdom

Attribution & capacity confidence:mediumprimary source

Overview

source: link

Proposed transmission demand connection on NESO's Existing Agreements (Gate 2) register: 150 MW at Cardiff East GSP, indicative connection date 2037. A connection agreement is not planning permission — it shows who has reserved grid capacity for a data center.

The grid behind this site

source: Ember · Eurostat

Grid carbon intensity

217 gCO₂/kWh

Clean electricity

64%

Fossil electricity

36%

National grid context, not this facility's own metering. Full country picture: United Kingdom data centers.

In the news

source: Google News (local + English)

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