Scope 3 Reporting
5 Clicks or One Prompt, Never a Manual Rebuild
A Free, Location-Specific Report for Lower-48 Delivery Locations
The upstream emissions of your purchased natural gas are the one Scope 3 line you can't pull off a utility bill, and the usual way to get it is rebuilding delivery data by hand, site by site.
GasTrace gives you the reportable number calculated for that delivery location.Click through it yourself, or let your AI agent pull it.
Generating one takes less time than reading this page.
Create a free account. All you need is your D-U-N-S Number. Pick a delivery location, enter the period and average daily volume, and GasTrace generates a documented environmental attribute certificate (EAC) for the GREET-default Scope 3 Category 3 calculation—at no cost.
The Gas Line You Shouldn’t Have to Rebuild by Hand
The gas you burn on-site is your Scope 1. That part is straightforward. The emissions from getting that gas to you, including extraction, processing, pipeline transport, storage, and distribution, are Scope 3 Category 3. They are invisible from the meter.
For most SB 253 reporters, that line is still calculated with one national or regional emission factor applied to total gas volume. It produces a number, but not much evidence. There is no record of which basin the gas came from, which pipelines moved it, or how far it traveled.
That may have worked when Scope 3 was a best-effort figure in a voluntary report. Under SB 253, it becomes part of an assurance-facing corporate disclosure. When auditors ask how you built the number, an averaged factor leaves you reconstructing the answer after the fact.
Without GasTrace, you rebuild the line yourself: pull delivery locations and volumes for every facility, match each location to an emission factor, document the trail, and repeat the process every cycle. For one site, tedious. For a few hundred, it becomes a project with a deadline attached.
GasTrace Is Your Source for Natural Gas Scope 3 Category 3 Data
GasTrace is a workflow inside Greentruth that turns a natural gas delivery location, reporting period, and gas volume into a documented environmental attribute certificate (EAC) for upstream Scope 3 Category 3 emissions.
GasTrace replaces the average with a calculation tied to the actual physical path. At the free GREET-default tier, the EAC is a reporting record, not a transactable Quantified Emission Token (QET). It gives you a GHG Protocol-aligned, location-specific calculation, with the result decomposed across Production, Gathering & Boosting, Processing, Transmission, Storage, and Distribution.
The calculation is built from R&D GREET 2025 reference values, IPCC GWP factors, and modeled transmission distance across EarnDLT’s Lower-48 pipeline network model. Where the pathway can be validated, the EAC documents the route logic, methodology, assumptions, and stage-level emissions behind the number.
The upgraded tier replaces GREET defaults with verified, producer-specific or operator-specific environmental attributes where available. That is the QET layer. The free EAC gives you the defensible baseline. The QET layer sharpens the claim with verified, machine-ready carbon-intensity data tied to the actual supply chain.
Three Ways in, Scaled to How Much You've Got
One Location
Enter the delivery point, get the report. Five clicks.
Many Locations
Feed your list and get them back as a set.
Zero-Touch
Connect GasTrace to your AI assistant via our MCP & let it pull the numbers.
See Exactly How Short the Path Is
A
Enter the delivery location
Add the address or facility where the gas is consumed.
Add the reporting details
Enter the reporting period and average daily volume for that location.
Add supplier details if you have them
Optionally identify the basin, producer, or direct-pipeline connection to refine the match.
Review the matched EAC
GasTrace returns the Scope 3 Category 3 result, stage-level breakdown, carbon intensity, and documented calculation record.
Generate and export the report
Download or export the documented result for your SB 253 workflow.
The Number Comes with Its Own Defense
A spreadsheet number can comply, but you are the one who has to defend it. You have to document the method, hold the trail, explain where the factor came from, and show how you drew the Scope 3 Category 3 boundary. GasTrace gives you a documented record with the method, source data, pathway logic, assumptions, and stage-level emissions behind the number, so you are not reconstructing your reasoning on demand.
Free usually means thin. Here it does not.
The free GREET-default EAC is built on public, versioned source data, including R&D GREET 2025 reference values, IPCC GWP factors, and modeled transmission distance across EarnDLT’s Lower-48 pipeline network model. The calculation is aligned to GHG Protocol Scope 3 Category 3 reporting logic, with documented provenance for the assumptions, inferred connections, and pathway logic behind the result.
That gives you a location-specific baseline that is much stronger than a national or regional average. The number is not just a factor applied to total volume. It is tied to the delivery location, reporting period, gas volume, and modeled pathway, with the result decomposed across Production, Gathering & Boosting, Processing, Transmission, Storage, and Distribution.
The point is simple: you hand over a record, not just a number.
2027 sounds far. This year's data isn't.
SB 253 reports cover the prior fiscal year. That means the 2027 Scope 3 disclosure is expected to run on FY2026 activity, including the natural gas your sites are consuming now.
For the gas line specifically, that matters. Capture the delivery-location record as the gas is used, and the 2027 disclosure becomes a lookup. Wait, and you are reconstructing a year of multi-site delivery data against the clock.
Scope 1 and 2 come first in 2026. Scope 3 begins in 2027, while CARB continues to shape the program through rulemaking. That uncertainty is not a reason to sit still. It is a reason to build the per-location record before auditors start asking how the number was made.
For Companies with a Real Gas Footprint
GasTrace is built for companies with more than $1 billion in annual revenue that do business in California and burn natural gas across multiple delivery locations.
Manufacturing, data centers, campuses, logistics, food production, real estate portfolios, multi-site retail, anywhere the gas line is large, distributed, and exposed to review.
The pain gets acute when sites draw from different basins, through different pipelines, across different regions. That is exactly the variation a national or regional factor erases, and exactly the variation auditors may ask you to explain.
Built for the sustainability, accounting, compliance, and procurement teams who own the number, and for the ESG platforms and consultants reporting on their behalf. Whichever side you sit on, you are the one who has to stand behind the gas figure.
FAQ
Scope 3 Category 3 covers fuel- and energy-related activities, including the upstream emissions from producing and delivering the fuel you consume. For natural gas, those emissions can depend on basin, pathway, pipeline transport, storage, and distribution. A national or regional average can produce a number, but it does not give you much location-specific evidence behind that number.
Get the number before you're asked for it.
Five clicks, or one prompt. Start free, by delivery location.
Not ready to generate a report yet?
Learn how GasTrace works, prepare for SB 253, or see how documented records support broader disclosure workflows.