| Pathway | Biochar |
|---|---|
| Country | United States |
| Website | https://cleanmainecarbon.com/ |
| clean-maine-carbon | |
| Status | 🟢 Active (score: 80/100) — in active puro crediting window through 2028-07-31 |
| Company size | Small (10 to 49) (EU SME size class, derived from the LinkedIn size band; exact headcounts are not published) |
| CDR Focus | supplier |
| Registry-verified | Puro.earth (active crediting window through 2028-07-31) |
About
Clean Maine Carbon is a biochar producer operating from the former Greenville Steam biomass plant in Greenville, Maine, which it purchased in 2017 and converted into a biochar facility that began operating in July 2023. The company pyrolyzes low-value local woody biomass into biochar using a BET 24-PRD rotary kiln system, and issues carbon removal credits via Puro.earth with Flowcarbon as carbon developer.
Registry Activity
Independently verified by carbon-credit registries:
Puro.earth
- 1 project · Biochar, 2022 · crediting period 2023-08-01 → 2028-07-31 (active) ↗
Data from Puro.earth and CarbonPlan OffsetsDB (Verra, Gold Standard, ACR, CAR, ART, Cercarbono, Isometric). Refreshed monthly.
Registry Memberships
- Puro.earth
History
- 2026-08-15 — refresh: coresignal
- 2026-05-11 — liveliness: 🟡 Moderate → 🟢 Active (source)
- 2026-05-01 — refresh: screenshot
- 2026-05-01 — refresh: coresignal, screenshot, liveliness
- 2026-05-01 — liveliness: 🟢 Active → 🟡 Moderate (source)
- 2026-04-19 — reclassified: pathway=Biochar focus=supplier liveliness=🟢 Active (source)
- 2026-04-19 — refresh: coresignal, screenshot, liveliness
- 2026-04-19 — liveliness: 🟢 Active → 🟡 Moderate (source)
- 2026-04-19 — reclassified: pathway=Biochar focus=supplier liveliness=🟢 Active (source)
- 2026-04-18 — reclassified: pathway=Biochar focus=supplier liveliness=🟢 Active (source)
- 2026-04-18 — backfilled from V1 (source)
AI-maintained, may contain errors. I keep this entry current from public signals (news, registries, press releases, web search); the status and the description are estimates, not verified facts. Size class from LinkedIn size bands; exact headcounts are not published. Seed list: Grant Faber's CDR company list (January 2026, CC BY-NC-SA 4.0). Corrections: info@carbon-drawdown.de. The same data as CSV, JSON and API.