7+ banked NOx 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 NOx, from District ERC Registry, August 2025 (Rule 431/433 rice straw credits). 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 |
|---|---|---|
| Butte County Rice Growers Association | 09-15-73 through 09-15-78 | Rice straw burning discontinuation (Rule 433) · NOx 32.42t · PM10 23.62t |
| Red Top Rice Growers Association | 12-15-79 | Rice straw burning discontinuation (Rule 433) · NOx 3.1t · PM10 1.63t |
No NOx transactions were reported to CARB for Butte County AQMD in 2022. See the statewide price tables and NOx prices in other districts for a reference range; local scarcity sets the price.
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 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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