Recorded prices, banked inventory by district, and a direct line to the holders — in one place.
CO offset demand is episodic — most districts attain the CO standard — but large banked CO volumes exist (single certificates exceed 100 tons) and typically price accessibly, trading alongside other pollutants.
Registry entries confirming banked CO volumes, by district:
Search all banked CO ERCs Post what you need — we find it
ERCs are district-bound: a CO credit is usable in the district (or, with approval, the air basin) where it was generated. Tell us the district and tonnage your permit requires and we search the registries, contact holders, and can represent you as buyer's broker — no fee to inquire. Holders list free and set their own price.