Yolo-Solano AQMD Emission Reduction Credits

Currently sourcing in this district

Posted by the Exchange on the wanted board. Responses go to the Exchange desk, privately.

ERCs listed for sale in Yolo-Solano AQMD

Banked ERC certificates of record, 137 across 49 holders

From the district's public registry (District ERC Registry, May 19, 2025 (lb/yr, also shown here as tons/yr)). Register edition retrieved 2026-10-03, last checked 2026-10-21; every certificate is mirrored, with its own page. These are banked credits, the registry shows what exists, not what the holder has committed to sell. Open the interactive registry to search, view pollutant breakdowns, and send an inquiry.

Recorded ERC transaction prices in Yolo-Solano AQMD

2023: 21 transactions reported to CARB under Health & Safety Code §40709.5.

Source: CARB ERC transaction report for 2023.

2022: 2 transactions reported to CARB under Health & Safety Code §40709.5.

Source: CARB ERC transaction report for 2022.

Statewide tables, 2022–2025, on the ERC prices page.

Every recorded sale in Yolo-Solano AQMD, year by year

From the district's own transaction records, Yolo-Solano AQMD — ERC Transactions, and, for sales the district file does not list, from Table V-1 of CARB's statewide §40709.5 reports. Where both record the same sale the district's figure is used and the CARB line is not counted again. Median price per ton as recorded, the number of sales (n) and the low–high range. 292 transactions in all. Prices are shown as printed, including a few nominal ones ($1–$100 per ton) that sit at the low end of some ranges. Download every transaction (CSV).

Transferring ERCs in Yolo-Solano AQMD

The district's own procedure, step by step, from its rules and forms (checked 2026-10-04). Every deal room on the Exchange follows these steps.

1. Buyer and seller set the price privately; the District does not set ERC prices (source)
2. Seller signs a writing authorizing the transfer (Rule 3.5 Section 407.5) (source)
3. Seller's responsible official completes and signs Form 05, one per certificate, with quarterly amounts and $/ton price (source)
4. Within 30 days of the signed writing, submit Form 05, the original certificate, the signed writing and the $280-per-certificate fee (source)
5. Pay any outstanding District balances before re-issuance (source)
6. District reviews, issues a new certificate to the buyer and a remainder certificate to the seller for partial transfers, and records the transfer in the register (source)

Restrictions the district states: Rule 3.5 Section 407.5: the transferor's certificate and a writing signed by the transferor must be surrendered by the transferee "within 30 days of the date of the writing authorizing the transfer"; the District "may refuse to recognize any transfer" that does not comply. (source) · Rule 3.5 Section 407.9: leases or temporary transfers are allowed, but "all transfers shall be considered permanent until modified by application" showing the emissions requiring the ERCs ceased or were otherwise offset. (source) · Rule 3.5 Section 407.8: lost or destroyed certificate requires a written request with owner's affidavit; only the replacement certificate is recognized for transfer; replacement fee per Rule 4.1. (source) · Rule 3.5 Section 311.2: open biomass burning ERCs tied to a parcel terminate 15 days after sale of the parcel unless title is restricted or a transfer application to the new landowner is filed within 14 days of title transfer. (source) · Form 05: one application per ERC certificate; values stated in pounds per quarter. (source) · Inter-district: ERC page says the Board "can allow interdistrict ERC transfers in accordance with California Health & Safety Code 40709.6" when ERCs cannot be bought in Yolo-Solano. Rule 3.4 Section 303.2: offsets from another district usable only after APCO review under H&SC 40709.6; Section 303.3: ROC/NOx offsets for major sources must come from the Sacramento Federal Non-attainment Area. (source) · No discount at transfer stated. Rule 3.5 Section 408 applies a 1.05-to-1.0 adjustment only when ERCs are first certified. (source) · District publishes an ERC Registry (updated quarterly) and an ERC Transaction History showing dollars per ton and tons transacted. (source)

Yolo-Solano AQMD: contacts, banking rule and fees

From the district’s own pages, rules and forms, each fact linked to where it is published. Last verified 2026-10-06. Rules and fees change; confirm with the district before you file.

Where the district’s own documents disagree: Rule 3.5 sec 401.4 says ERC fees follow 'Section 308.10 (Time and Material Labor Rate) of Rule 4.1', but current Rule 4.1 puts the T&M rate in sec 307.10 (sec 308 is duplicate permits).

How ERCs work in Yolo-Solano AQMD

Emission Reduction Credits are banked, district-certified reductions in NOx, ROG/VOC, PM10, SOx, or CO. Businesses building or expanding in the district may be required under New Source Review to purchase ERCs to offset new emissions before an air permit issues. Credits are generally usable only within Yolo-Solano AQMD (or its air basin with district board approval, Health & Safety Code §40709.6), which is why local scarcity sets the price. The district verifies reductions and records every transfer.

District office: (530) 757-3673. District ERC program page.

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Yolo-Solano AQMD credits by pollutant

NOx credits in Yolo-Solano AQMD · ROG / VOC credits in Yolo-Solano AQMD · PM10 credits in Yolo-Solano AQMD · SOx credits in Yolo-Solano AQMD · CO credits in Yolo-Solano AQMD

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