Briefing paper · For the Chief Sustainability Officer

The Category 1 line nobody is measuring.

Under GHG Protocol, digital operational emissions sit inside Scope 3 Categories 1 and 8. Under ESRS E1 §46-51, IFRS S2 §29 and CDP C6.5, they must be substantiated with a defensible, source-linked method. In practice, almost no enterprise inventory captures the pre-consent slice, and no existing framework tells you how. This is the paper on how Pipelit closes that line.

Open method · CC-BY. UK grid intensity live from NESO. Reproducible from first principles by any external assurance provider.

“Across 46 UK enterprise sites, pre-consent tracker payload accounts for more than 500 tonnes of CO2e per year, a Scope 3 slice sitting inside Category 1 that no current inventory captures, and that no framework has told CSOs how to measure.”

The Ghost Carbon™ Report · A Pipelit Publication · read the full report
Where digital sits

You already own this line. You just can't measure it yet.

Scope 3 Categories 1 (purchased goods & services) and 8 (upstream leased assets) both contain digital operations. GHG Protocol acknowledges it. Every major disclosure standard requires it. And almost no CSO has a defensible number for it.

Where digital operational carbon lives in your inventory

Scope 1 Direct emissions, owned facilities, company vehicles, on-site combustion. ✓ Well-measured
Scope 2 Purchased energy, electricity, steam, heat used at your sites. ✓ Well-measured
Scope 3 · Cat 1 Purchased goods and services, including the tag manager, CDN, analytics, ad tech and third-party scripts running on your site. ✓ Partial
Cat 1 · Digital The gap: transferred bytes on the visitor's device and network, and the grid carbon they consume, especially the ones firing before consent, which nobody was ever paid to inventory. Pipelit measures it
Scope 3 · Cat 8 Upstream leased assets, cloud, hosting, edge infrastructure supporting the digital estate. ✓ Partial
GHG ProtocolScope 3 Standard, Cat 1 & 8

“Purchased goods and services include all upstream (cradle-to-gate) emissions from the production of products purchased by the reporting company”, digital services included.

ESRS E1Paragraphs 46-51

Value-chain emissions must be disclosed “on a consistent basis and using a method that supports the level of assurance required.” Estimated proxies without source data will not pass limited assurance.

IFRS S2§29, ISSB

Scope 3 measurement must reflect activity data where available. For enterprises with digital-first operations, this includes traffic-level emissions data at operational granularity.

CDPC6.5 · Methodology disclosure

Reporting entities must disclose the methodology used to calculate each Scope 3 category. “Not measured” is a permitted answer, but it is scored, and it is public.

The workflow

From URL to disclosure-ready line item in four steps.

The whole cycle, measurement, remediation, verification, reporting, runs on the same open method, so the number the auditor sees in March is the same number the developer saw in October.

01 · Measure

Real bytes, three engines

Every public URL scanned across Chrome, Firefox and Safari. Only the pre-consent tracker bytes are counted, not the page content, not consented analytics.

02 · Locate

Live grid, per jurisdiction

The waste is multiplied by the grid intensity of the jurisdiction where the visitor actually loaded the page, using the Open Grid feed.

03 · Remediate

Usually one config change

Findings are given with the exact remediation, typically a tag manager firing rule. Reduction, not just reporting.

04 · Evidence

Assurance package

Every scan produces a report and a raw dataset. Both are exportable, both are reproducible from the CC-BY method by an external assurance provider.

What the auditor gets

Two documents, one assurance track.

Every scan produces exactly what a limited assurance engagement needs to walk your figure: the reproducible calculation and the raw data trail underneath it.

Report · PDF

Disclosure-ready line item

A one-page assurance package: figure, method reference, calculation trail, and the grid intensity used at measurement time.

  • Emissions / year 2.34 tCO2e
  • Cost / year (op) £9,120
  • Method version SWDM v4
  • Grid source Open Grid · NESO
  • Reproducibility CC-BY published
Dataset · CSV / JSON

Raw measurement trail

Per-request byte counts, tracker classification, jurisdiction resolution, and per-minute grid intensity used in the calculation. Suitable for an assurance provider to sample.

  • Rows / scan ~1,200
  • Fields 42 per row
  • Format CSV, JSON, Parquet
  • Retention 7 years
  • Immutability Content-hashed

Bring one URL. Leave with a Scope 3 line item.