Mati Carbon Hits New Bar for Carbon Removal Certification With Isometric's V1.2 Protocol

Mati Carbon has delivered 492.4 tonnes of CO2 removal credits certified under Isometric's V1.2 ERW protocol, marking the first time any enhanced rock weathering (ERW) company has met the requirements of Isometric's newest and most rigorous Enhanced Weathering certification standard. The credits trace back to Mati Carbon's Seoni and North Chhattisgarh projects in India, where the company spreads crushed basalt across smallholder farmland to speed up natural carbon capture.

The milestone matters because earlier versions of Isometric's ERW protocol required suppliers to run a secondary validation check alongside their primary soil or porewater measurements. V1.2 drops that requirement, reflecting growing confidence in solid-phase monitoring, reporting, and verification (MRV) methods as the science has matured. Mati becoming the first to clear this bar signals the sector's measurement standards are catching up to its growth.

>> In Other News: Isometric Raises $40 Million to Scale AI Certification Across Carbon, Energy and Industrial Markets

How Mati's ERW Process Works

Enhanced rock weathering speeds up a process that already happens in nature. Crushed basalt gets spread across rice paddies in central India. Rainwater reacts with the rock, drawing down atmospheric CO2 and converting it into stable bicarbonate that eventually washes to the ocean, where it stays locked away for thousands of years.

Mati works exclusively with smallholder farmers across India, Zambia, and Tanzania, framing the carbon removal work as a way to boost crop yields and farmer income at the same time. The high water flux in rice paddies helps accelerate basalt dissolution, which speeds up the weathering reaction Mati is measuring for credit.

A Transparency Push Alongside the Certification

Mati's certification announcement leaned heavily on the idea that better MRV data benefits the whole ERW sector, not just one company. The company says the past year of work refining its logistical and analytical systems meaningfully improved the quality of its solid-phase datasets ahead of this delivery.

"The methodological choices behind a defensible CDR claim are still being iterated across the sector, and we believe the field moves faster when suppliers share the analytical frameworks they use to justify their claims," Mati Carbon stated in its announcement.

That philosophy led the company to release a free public tool last month that lets anyone stress-test their own ERW soil data using the same significance tests Mati ran on its Isometric delivery. The tool is built around TiCAT, the most widely used solid-phase MRV method in the ERW field, which tracks weathering by measuring shifts in metal cation ratios relative to titanium, an immobile tracer in soil.

Why This Matters For Carbon Markets

ERW has moved fast from pilot projects to commercial deployment over the past two years, with Mati Carbon and competitors racing to prove their measurement approaches hold up to scrutiny. Mati won the $50 million grand prize at the XPRIZE Carbon Removal competition in 2025 for its scalable, scientifically robust approach to enhanced rock weathering.

Clearing the V1.2 bar gives buyers a stronger signal that Mati's credits hold up under the toughest scrutiny currently available in the ERW space. As more buyers look for durable, well-verified carbon removal, certification rigor is becoming as important a differentiator as price or volume.

Mati's full delivery, including the underlying calculations, is published on the Isometric Registry for anyone to review.

About Mati Carbon

Mati Carbon is an enhanced rock weathering company focused on the Global South, working with smallholder farmers in India, Zambia, and Tanzania to restore depleted soils with basalt rock dust while permanently removing atmospheric CO2.

About Isometric

Isometric is a London and New York based carbon removal certifier that combines AI-assisted review with human verification, and is currently the largest certifier of carbon removal by contracted volume.