174 banked SOx certificates of record, recorded prices, and a direct line to the holders.
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Every registry entry in South Coast AQMD that includes SOx, from ERC & STERC Active List, July 2026. 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 |
|---|---|---|
| Plains Marketing, L.P. | 30 certificates (AQ015182 … AQ016022) | Facility: Long Beach · NOx 185 · ROG 434 · PM10 9 · SOx 183 (lb/day) |
| Tesoro Refining & Marketing Co, LLC | 24 certificates (AQ012942 … AQ015954) | Facility: Carson, Wilmington · NOx 12 · ROG 158 · PM10 149 · SOx 1 · CO 90 (lb/day) |
| UCLA | 5 certificates (AQ001439 … AQ001443) | Facility: Los Angeles · NOx 75 · ROG 3 · PM10 20 · SOx 106 · CO 40 (lb/day) |
| Orange County Sanitation District | 11 certificates (AQ006045 … AQ016009) | Facility: Huntington Beach, Seal Beach · NOx 18 · ROG 81 · SOx 9 · CO 100 (lb/day) |
| US Govt, Air Force Dept, March AFB | 5 certificates (AQ000686 … AQ002563) | Facility: Long Beach, Los Angeles, South Gate · NOx 40 · ROG 10 · SOx 20 · CO 115 (lb/day) |
| Chevron Products Co. | 13 certificates (AQ003171 … AQ015945) | Facility: El Segundo, Huntington Beach · NOx 5 · ROG 34 · PM10 19 · SOx 55 · CO 47 (lb/day) |
| Olduvai Gorge, LLC | 17 certificates (AQ008458 … AQ015895) | Facility: Diamond Bar · ROG 25 · PM10 29 · SOx 104 (lb/day) |
| Southern California Edison Co | 23 certificates (AQ001192 … AQ001309) | Facility: Anza, Baldwin Park, Corona, El Monte, Grand Terrace, Lakeview, Nuevo, Rialto, Riverside, Romoland, San Jacinto, Upland · NOx 4 · SOx 27 · CO 117 (lb/day) |
| NRG Power Marketing, Inc. | 15 certificates (AQ003333 … AQ007393) | Facility: Diamond Bar · ROG 51 · PM10 24 · SOx 45 (lb/day) |
| Air Products Manufacturing, LLC | 6 certificates (AQ015948 … AQ015953) | Facility: Paramount · ROG 28 · PM10 4 · SOx 4 · CO 82 (lb/day) |
| LA City, DWP Haynes Generating Station | 6 certificates (AQ003637 … AQ011142) | Facility: Long Beach · ROG 15 · PM10 31 · SOx 5 · CO 34 (lb/day) |
| LA City, DWP Scattergood Generating Stn | AQ004499 | Facility: Playa Del Rey · SOx 50 (lb/day) |
| Element Markets Emissions, LLC | AQ015366, AQ015367 | Facility: Diamond Bar · SOx 46 (lb/day) |
| Evolution Markets Inc. | AQ013169 | Facility: Diamond Bar · SOx 45 (lb/day) |
| U S Gov'T, V a Medical Center, West L a | AQ000688 | Facility: Los Angeles · SOx 39 (lb/day) |
| US Govt, Navy Dept LB Shipyard | AQ000957, AQ000958 | Facility: Long Beach · PM10 10 · SOx 5 (lb/day) |
| LA City, DWP Valley Generating Station | AQ003673, AQ004396, AQ005031 | Facility: Sun Valley · ROG 6 · SOx 2 · CO 2 (lb/day) |
| Alco Pacific Inc | AQ000175, AQ000176 | Facility: Carson · NOx 3 · SOx 3 (lb/day) |
| So California Edison, Mitchel Reservoir | AQ001240 | Facility: Anza · SOx 6 (lb/day) |
| Greenwood Enterprises | AQ013205 | Facility: Diamond Bar · SOx 4 (lb/day) |
| Granite Construction Company | AQ001176, AQ001177 | Facility: Indio · ROG 1 · SOx 2 (lb/day) |
| US Govt, Marine Corps, Camp Pendleton | AQ000038 | Facility: San Clemente · SOx 2 (lb/day) |
| Ecogas, Inc | AQ007907 | Facility: Santa Monica · SOx 2 (lb/day) |
| City of Hope Medical Center | AQ000331 | Facility: Duarte · SOx 1 (lb/day) |
No SOx transactions were reported to CARB for South Coast AQMD in 2023. 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 South Coast AQMD is usable in South Coast 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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