Annual verification · FY 2025
Verification report, independently signed
A summary of what Terravault removed, what an independent verifier confirmed, and how it reconciles — for the year ending December 2025.
Verifier’s statement
We reviewed Terravault’s metering, lifecycle accounting, and reservoir monitoring for the 2025 period. In our opinion, the 148,200 tons reported as net durable removal are fairly stated and conform to the Isometric DAC + Storage protocol.
IV
Independent Verifier · accredited under the Isometric registry
Verified across the fleet
Four facilities, three continents, one standard of proof.
By facility
Where the tons came from
Facility 01 — Hellisheiði
Geothermal · Iceland
52,400 t
45,600 t
99.1%
Facility 02 — Permian Basin
Solar PPA · United States
61,300 t
53,300 t
98.4%
Facility 03 — Oman
Basalt storage · Al Hajar
39,800 t
34,600 t
96.8%
Facility 04 — Pilbara
Solar + wind · Australia
17,000 t
14,700 t
95.2%
Total
170,500 t
148,200 t
97.8%
Certifications applied
Isometric DAC + Storage
148,200 t
Puro.earth CO₂ Removal
148,200 t
45Q qualified volume
148,200 t
How this was measured
Every figure here traces back to the metering, lifecycle, and monitoring methodology documented in full.
Want the underlying data?
The raw meter exports and monitoring records behind this report are in the data room, under NDA.