126 banked CO certificates of record, recorded prices, and a direct line to the holders.
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Every registry entry in San Diego County APCD that includes CO, from ERC Banking Registry, Class A active ERCs, last update August 12, 2025; MERC Banking Registry, last update May 18, 2023 (tons/yr). 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 |
|---|---|---|
| Dynegy South Bay LLC | 000019-02, 000039-02, 000050-04 | PM10 12.6 · CO 418.9 (t/yr) |
| Olduvai Gorge LLC | 23 certificates (070430-01 … APCD2025-ERC-000139) | NOx 27.85 · VOC 107.53 · PM10 1.3 · SOx 0.1 · CO 52.32 (t/yr) |
| H. G. Fenton Material Co. | 9 certificates (41106-03 … 975733-03) | PM10 130.46 · SOx 1.1 · CO 6.55 (t/yr) |
| San Diego Gas & Electric | 921291-03, 921291-04, 979298-02 | PM10 2.9 · CO 69.13 (t/yr) |
| General Dynamics, Convair | 951022-01, 951022-04, 951022-07 | PM10 1.5 · SOx 0.1 · CO 64.8 (t/yr) |
| Cabrillo Power II LLC | 7 certificates (978938-02 … 981518-04) | NOx 1.16 · PM10 2.9 · SOx 8.8 · CO 16.1 (t/yr) |
| City of San Diego, Metropolitan Wastewater Dept. | 4 certificates (950766-02 … 970821-02) | VOC 23.14 · PM10 0.63 · CO 1.88 (t/yr) |
| Jack Brunton | 973039-02 | CO 24.2 (t/yr) |
| NAVERUS, Inc. | 11 certificates (2023-ERC-000122 … 981954-04) | VOC 15.84 · PM10 1.13 · CO 7.07 (t/yr) |
| Ralston Purina | 50055-01, 50055-02, 50055-05 | PM10 0.5 · SOx 4.6 · CO 3.4 (t/yr) |
| Naval Station, San Diego | 8 certificates (940206-01 … 950949-03) | NOx 5.5 · VOC 0.05 · PM10 1.13 · SOx 0.04 · CO 0.87 (t/yr) |
| National Steel & Shipbuilding | 16 certificates (40994-01 … 40997-06) | NOx 0.54 · VOC 0.62 · PM10 0.68 · SOx 0.66 · CO 3.48 (t/yr) |
| USN Communications Station | 15 certificates (940560-01 … 940562-05) | NOx 2.64 · VOC 0.05 · PM10 0.34 · SOx 0.51 · CO 1.11 (t/yr) |
| Hanson Aggregates, Pacific SW Region | 4 certificates (980772-01 … 980772-04) | NOx 0.93 · VOC 0.26 · PM10 0.09 · CO 2.2 (t/yr) |
| General Dynamics Properties, Inc. | 5 certificates (970809-01 … 970809-05) | NOx 1.26 · VOC 0.23 · PM10 0.46 · SOx 0.02 · CO 1.17 (t/yr) |
| STMicroelectronics, Inc. | 978887-01, 978887-04 | PM10 0.1 · CO 1.5 (t/yr) |
| US Foam | 974375-02, 974375-03, 974375-05 | VOC 0.1 · PM10 0.1 · CO 1.1 (t/yr) |
| Element Markets | 070823-06 | CO 1.3 (t/yr) |
| Southern California Edison Company | 5 certificates (950171-01 … 950171-05) | NOx 0.51 · VOC 0.02 · PM10 0.01 · SOx 0.1 · CO 0.11 (t/yr) |
No CO transactions were reported to CARB for San Diego County APCD 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 San Diego County APCD is usable in San Diego County APCD (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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