Puro.earth · Isometric
How to get carbon credits for ERW
A practical walkthrough of what it takes to earn verified carbon credits from rock weathering deployments — and where digital evidence makes or breaks the process.
The process
How the credit process flows for erw
01
Log rock sourcing
Quarry source, mineralogy reference, grind size and delivered tonnage recorded per batch.
02
Map field application
Application events tie tonnes-per-hectare to a precise GPS field boundary.
03
Run soil sampling campaigns
Pre-registered sampling points guide field teams; collection is logged with photo proof.
04
Link lab data and export
Geochemical results attach to the exact point and campaign, building the time series CDR registries require.
This is the same field-to-credit flow every methodology follows — see it explained in general terms on our impact page.
Why erw credits get delayed or discounted
Almost every delay traces back to one of these four evidence gaps.
Application rates vary by field but records are farm-level at best
Soil sampling campaigns drift from their design without field discipline
Lab results arrive in PDFs disconnected from field locations
CDR registries demand sampling rigour paper processes can't prove
ERW carbon credits — FAQs
Which ERW registries and protocols does TrueCarbon support?
The platform's configurable schema adapts to Puro.earth and Isometric protocol data requirements — sampling design, application records and lab-data linkage are all first-class objects.
Can TrueCarbon manage repeated soil sampling rounds over years?
Yes. Sampling points are permanent, so every campaign returns to the same coordinates and results accumulate into a defensible time series.
More on this methodology
Guides for other methodologies
Ready to start earning ERW credits?
Talk to us about your programme's stage — whether you're mid-registration or just scoping the methodology.