NOx Emission Reduction Credits in California
Research recorded prices and district certificate records. Ask the Exchange to confirm current availability and obtain seller quotes.
Why NOx credits matter
NOx contributes to ozone formation. Offset requirements depend on the receiving district, project emissions, applicable thresholds and offset ratios. Confirm the permit requirements before selecting credits.
What NOx ERCs sold for, recorded 2023 prices (CARB)
| District | Median $/ton | Low | High |
|---|---|---|---|
| Imperial County APCD | $2,500 | $2,000 | $3,098.35 |
| Yolo-Solano AQMD | $37,800 | $37,800 | $37,800 |
| Feather River AQMD | $30,000 | $30,000 | $30,000 |
| South Coast AQMD | $400,000 | $380,000 | $420,000 |
| Bay Area AQMD | $29,000 | $23,235.72 | $29,090 |
| San Joaquin Valley APCD | $13,750 | $9,500 | $18,000 |
| Santa Barbara County APCD | $125,000 | $125,000 | $125,000 |
| Ventura County APCD | $65,000 | $65,000 | $65,000 |
Source: CARB 2023 ERC transaction report; 2022 and South Coast 2024 tables on the prices page. Yolo-Solano's own transaction history (1998–2024) shows NOx clearing $990–$75,000/ton across 36 recorded transactions.
Districts with banked NOx credits on the Exchange
Published register entries reporting NOx volumes, by district. These records do not confirm current seller availability:
Search banked NOx ERC records Request NOx credits privately
Request a current NOx quote
Provide the project district, required quantity, units, quarterly requirements if applicable, and permit deadline. We compare the credit price, minimum purchase, seller fees, district transfer charges and agreed brokerage compensation. A smaller quantity can cost more per ton when fixed charges apply. Historical prices are context, not a current offer.
Buy or sell NOx ERCs
Eligibility for NOx credits depends on the project and district rules. Some interdistrict uses are possible with required approvals under Health & Safety Code §40709.6. Tell us the district and tonnage your permit requires and we research district records and request quotes from holders or their representatives. Initial inquiries are free. Brokerage services and compensation are agreed in writing. Holders list free and set their own asking price.