6+ banked SOx certificates of record, recorded prices, and a direct line to the holders.
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Every registry entry in Monterey Bay ARD that includes SOx, from Active ERC Registry, Sept 5, 2025 (volumes in tons). 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 |
|---|---|---|
| CEMEX Inc. | ERC-0000001 | NOx 656.7t · SOx 329.2t · CO 3,986.8t · PM10 101.5t · PM2.5 40.6t · VOC 6.9t |
| Aera Energy LLC | ERC-22-001 | NOx 204.1t · SOx 169.3t · PM10 91.8t · VOC 1.6t |
| Chevron USA Inc. | ERC-0000013 | SOx 144.6t · PM10 58.1t · NOx 43.2t · PM 44.2t |
| Calpine Corporation | ERC-0000018 | NOx 6.9t · SOx 5.6t · VOC 2.5t |
| Olam West Coast Inc. | ERC-0000010 | CO 6.7t · SOx 3.6t |
| Dept. of the Army — Presidio of Monterey | ERC-0000012 | SOx 2.0t · NOx 1.5t · CO 0.8t |
No SOx transactions were reported to CARB for Monterey Bay ARD in 2022. See the statewide price tables and SOx prices in other districts for a reference range; local scarcity sets the price.
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 Monterey Bay ARD is usable in Monterey Bay ARD (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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