136+ banked NOx certificates of record, recorded prices, and a direct line to the holders.
Home / District guides / Bay Area AQMD / NOx
Every registry entry in Bay Area AQMD that includes NOx, from District bank-status database export, Aug 28, 2026 (426 certificates; volumes in tons; 35 owner-flagged 'available for sale'). Top holders by pollutant 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 |
|---|---|---|
| Tesoro Refining & Marketing Co., LLC | 8 certificates | Refining — Martinez · SO2 2,892.4 · NOx 130.7 · CO 33.2 · PM10 11.8 (t) |
| Valero Refining Company — California | 13 certificates | Refining — Benicia · SO2 2,467.3 · NOx 19.4 · PM10 1.7 (t) |
| Lehigh Southwest Cement Company | 5 certificates | Cement — Cupertino · CO 1,106.2 · NOx 195.4 · SO2 187.4 · PM10 79.6 (t) |
| Calpine Corporation | 24 certificates | Power generation · NOx 480.3 · SO2 460.1 · CO 140.7 (t) |
| Pacific Gas & Electric Company | 20 certificates | Utility / power plants · NOx 324.7 · SO2 221.1 · CO 100.6 · PM10 73.2 (t) |
| Chevron Products Company | 14 certificates | Refining — Richmond · CO 509.1 · SO2 100.2 · NOx 70.1 · PM10 31.2 (t) |
| GenOn Emissions, LLC | 4 certificates | Power generation · CO 465.5 · PM10 182.3 · NOx 6.2 (t) |
| Marsh Landing LLC | 1 certificate | Power — Antioch · NOx 210.4 · SO2 125.2 · CO 114.0 · PM10 25.3 (t) |
| Harbert ERC, LLC | 11 certificates | ERC holder · SO2 169.8 · CO 52.3 · NOx 10.7 · PM10 10.3 (t) |
| PSEG Global USA, LLC | 10 certificates | Power generation · SO2 169.8 · CO 52.3 · NOx 10.7 · PM10 7.6 (t) |
| Martinez Refining Company LLC | 9 certificates | Refining — Martinez · NOx 103.4 · SO2 64.8 · PM10 8.6 (t) |
| U.S. Air Force | 17 certificates | Federal / military · NOx 54.8 · CO 45.1 · SO2 14.7 · PM10 8.8 (t) |
| Pollutant | Median $/ton | Low | High |
|---|---|---|---|
| NOx | $22,000 | $7,974 | $31,000 |
Source: CARB 2022 ERC transaction report (21 transactions district-wide). Statewide table on the ERC prices page.
NOx is the most demanded offset pollutant in California — it drives ozone formation, and New Source Review permits in ozone nonattainment areas (San Joaquin Valley and South Coast are classified Extreme; Sacramento Metro is Serious) carry binding NOx offset requirements at ratios up to 1.5-to-1.
ERCs are district-bound: a NOx credit banked in Bay Area AQMD is usable in Bay Area 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.
Inquire on Bay Area AQMD NOx creditsPost what you need
All Bay Area AQMD ERCs · NOx ERCs statewide · ERC prices · How to buy · How to sell