9 banked SOx certificates of record, recorded prices, and a direct line to the holders.
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Every registry entry in Butte County AQMD that includes SOx, from District ERC Registry, August 2025. 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 |
|---|---|---|
| Pacific Oroville Power, Inc. | 5 certificates (02-15-68 … 02-15-72) | NOx 280,698 · ROC 36,327 · PM10 98,517 · PM2.5 41,887 · SOx 60,633 · CO 3,641,049 (lb/yr) |
| Turkey Track Rice Ranch | 03-11-63 | NOx 2,904.7 · ROC 2,625.5 · PM10 3,519.2 · PM2.5 3,295.7 · SOx 614.5 · CO 32,063.6 (lb/yr) |
| Sacramento Packing, Inc. | 09-10-63, 09-10-64, 09-10-65 | NOx 7,750 · ROC 1,101 · PM10 761 · PM2.5 761 · SOx 60 · CO 6,213 (lb/yr) |
No SOx transactions were reported to CARB for Butte County AQMD 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 Butte County AQMD is usable in Butte County 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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