Independent soil sampling and lab work for rock-weathering carbon projects
TL;DR Rocksample does the measuring for companies that spread crushed basalt on Indian farms to earn carbon removal credits. Its crews sample soil and porewater on treated and control plots, and its lab runs the analyses registries demand. Project developers pay per sampling round, because credits can't be issued without this data.
India suits enhanced rock weathering. A 2020 Nature study placed India among the four countries best able to deliver cropland weathering, at about ₹7,700–17,400 a tonne (US$80–180)[1]. Acid soils respond best, and a 2026 survey of 2.4 lakh farm soil samples found about 29% of the area studied was acidic[2].
The bottleneck is proof. One leading registry's protocol asks for baseline soil data, control plots, porewater chemistry, heavy-metal checks and a full uncertainty analysis, and it issues credits at a conservative percentile of the result[3].
On Indian smallholdings of an acre or two, that means thousands of samples from many tiny plots, collected on time and analysed to a standard buyers trust.
Rocksample sells measurement, not rock. Trained field crews take soil cores and porewater samples on treated and control plots at the times a project's design requires, log each with GPS and photos and ship them under chain of custody to Rocksample's own lab. The lab characterises the rock feedstock, measures cations and carbonate and screens for metals.
Developers get data packages formatted for their registry and verifier, plus a sampling plan that keeps the uncertainty low enough to earn more credits per hectare.
I reframed the seed, which was an ERW developer of its own. That race is already crowded in India - one Indian developer won a US$100 million global carbon removal prize in April 2025[4] and reports 36,000-plus farmers[5], and another developer is working in Darjeeling[6]. A neutral measurement provider serves all of them, and every new developer that follows.
The farmer is the field site but never pays. The payer is the ERW project developer, Indian or foreign, which has to fund sampling for each reporting period. Some developers will prefer to keep the work in-house, so the pitch is cost and independence, since outside data looks better to verifiers and buyers. I found no public price for ERW sampling in India, so quote per plot per round and test it with three developers.
Buyers are paying for ERW credits, and one Indian developer lists big global tech and fashion brands among its early buyers[5]. Protocols have hardened, with one leading registry now on version 1.3[3]. NABL extended its accreditation validity to four years in October 2024[7], which makes an accredited lab easier to keep.
Nobody publishes a figure for spending on ERW measurement in India. The wider durable-removal market shows 50.6 million tonnes contracted against 1.7 million delivered, across all methods[8]. That gap is delivery that has yet to be measured and verified. Treat it as adjacent context, not your market.
One leading developer works with IIT Kanpur and Yale on its science[5], and large developers often run their own sampling. A climate non-profit coordinates ERW field trials and shares datasets but doesn't sell sampling services[9]. Indian soil-testing labs are a dime a dozen, but they run routine fertility tests, not porewater and cation work to registry standards.
The gap is an independent, registry-grade measurement service based in India.
| Difficulty | Hard (52/100) |
| Starting capital | ₹1.2–2.2 Cr |
| Time to launch | 9–12 months |
The chemistry is known, but doing it at scale is hard. You need costly lab instruments, staff who can run them to accredited standards and crews who can reach scattered plots on schedule during the monsoon. Developers will test your numbers against their own, and one sloppy batch could cost you the client.
No licence is required to run a soil lab, but buyers and verifiers expect accreditation.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't let AI fill in missing samples or adjust results. Credits depend on measured data, and a verifier will reject anything modelled to cover gaps.
Want to work out the AI layer for Rocksample? Talk to Yash →
Here's what can go south -
I think this is a good fit for a founder with a soil-science or analytical-lab background and contacts among carbon developers. If you want to own the climate story then it'll frustrate you.
Before buying instruments, prove that two developers will sign paid sampling contracts for a full reporting period.
Plan for roughly ₹1.2–2.2 Cr for lab instruments, field crews and the time it takes to earn accreditation.
No licence, but NABL accreditation under ISO/IEC 17025 is what buyers and verifiers expect, along with company and GST registration.
Yes, wherever enhanced weathering projects need measuring. Check local lab accreditation bodies and which registries operate there.
The free Rocksample validation kit has the line-by-line capital breakdown, the effort scoring, the accreditation and protocol checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for project developers, and 5 assumptions to test. Download the kit →
Thinking about building Rocksample or something close to it? The make-or-break work is getting lab results that verifiers accept and developers can't match in-house for the price, and I help founders test exactly that kind of pitch. If you need a hand, you know where to find me. Talk to Yash →
For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.