85+ banked SOx certificates of record, recorded prices, and a direct line to the holders.
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Every registry entry in San Joaquin Valley APCD that includes SOx, from District ERC registry (updated daily); 350+ NOx certificates — top holders 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 |
|---|---|---|
| Aera Energy LLC | 140+ certificates across all five pollutants | VOC ~1,215t · SOx 364.4t · CO ~155t · PM10 33.6t · NOx (55+ certs) |
| Chevron USA Inc. | 8 NOx certificates | PM10 24.9t · CO ~9.5t · VOC 7.6t · SOx 6.8t · NOx (8 certs) |
| California Resources Production Corp. | 7+ NOx certificates | SOx 35.3t · NOx (7+ certs) |
| Olduvai Gorge LLC | 3 NOx certificates | PM10 29t · SOx 24.2t · NOx (3 certs) |
| Ingredion Incorporated | 3 certificates | SOx 88.5t · CO ~65t |
| Calaveras Materials Inc. | 2 certificates | CO ~74t · SOx 4.4t |
| Calpine Corporation / Calpine Energy Services | 5+ certificates | PM10 62.7t · VOC 26.6t · SOx 7.1t · NOx (3 certs) |
| Guardian Industries Holdings, LLC | 1 SOx certificate | SOx 35.3t |
| Hydrogen Energy CA LLC | 1 SOx certificate | SOx 12.3t |
| Pollutant | Median $/ton | Low | High |
|---|---|---|---|
| SOx | $57 | $57 | $7,250 |
Source: CARB 2022 ERC transaction report (53 transactions district-wide). Statewide table on the ERC prices page.
SOx demand is thinner than NOx or ROG, and SOx volumes often trade as add-ons to a larger deal — but recorded 2022 sales ran as high as $20,000/ton in the Bay Area.
ERCs are district-bound: a SOx credit banked in San Joaquin Valley APCD is usable in San Joaquin Valley 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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