122+ banked CO certificates of record, recorded prices, and a direct line to the holders.
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Every registry entry in Bay Area AQMD that includes CO, from District bank-status database export, Aug 28, 2026 (426 certificates; volumes in tons; 35 owner-flagged 'available for sale'). Top holders by pollutant shown.. These are banked credits — the register shows what exists, not what the holder has agreed to sell. Open the interactive registry to send an inquiry on any of them.
| Holder of record | Certificate(s) | Source / pollutants banked |
|---|---|---|
| Tesoro Refining & Marketing Co., LLC | 8 certificates | Refining — Martinez · SO2 2,892.4 · NOx 130.7 · CO 33.2 · PM10 11.8 (t) |
| Lehigh Southwest Cement Company | 5 certificates | Cement — Cupertino · CO 1,106.2 · NOx 195.4 · SO2 187.4 · PM10 79.6 (t) |
| Calpine Corporation | 24 certificates | Power generation · NOx 480.3 · SO2 460.1 · CO 140.7 (t) |
| Pacific Gas & Electric Company | 20 certificates | Utility / power plants · NOx 324.7 · SO2 221.1 · CO 100.6 · PM10 73.2 (t) |
| Chevron Products Company | 14 certificates | Refining — Richmond · CO 509.1 · SO2 100.2 · NOx 70.1 · PM10 31.2 (t) |
| GenOn Emissions, LLC | 4 certificates | Power generation · CO 465.5 · PM10 182.3 · NOx 6.2 (t) |
| Marsh Landing LLC | 1 certificate | Power — Antioch · NOx 210.4 · SO2 125.2 · CO 114.0 · PM10 25.3 (t) |
| Harbert ERC, LLC | 11 certificates | ERC holder · SO2 169.8 · CO 52.3 · NOx 10.7 · PM10 10.3 (t) |
| PSEG Global USA, LLC | 10 certificates | Power generation · SO2 169.8 · CO 52.3 · NOx 10.7 · PM10 7.6 (t) |
| Anew Environmental, LLC | 7 certificates (4 flagged available) | ERC aggregator / broker · SO2 197.9 · CO 3.8 · PM10 2.3 (t) |
| Homestake Mining Company | 1 certificate | Mining — Napa · PM 87.5 · CO 87.0 (t) |
| U.S. Air Force | 17 certificates | Federal / military · NOx 54.8 · CO 45.1 · SO2 14.7 · PM10 8.8 (t) |
No CO transactions were reported to CARB for Bay Area AQMD in 2022. See the statewide price tables and CO prices in other districts for a reference range; local scarcity sets the price.
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.
ERCs are district-bound: a CO credit banked in Bay Area AQMD is usable in Bay Area AQMD (or its air basin with district board approval). Tell us the tonnage your permit requires and we contact the holders above, confirm what is available, and can represent you as buyer's broker — no fee to inquire.
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