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2024 SO2 Allowance Auction

The 2024 SO2 Allowance Auction took place on March 26, 2024. Allowances were auctioned that could first be used in 2024 as well as in 2031. Details are provided via the links below.

Allowances Available for Auction
Origin of AllowancesSpot Auction
(First Usable in 2024)
7 Year Advance Auction
(First Usable in 2031)
EPA125,000125,000
Privately Offered00
Total125,000125,000
Spot Auction Results
AllowancesNumber of BidsNumber of BiddersBid Price
Bid For: 125,000Successful: 1Successful: 1Highest: $.02
Sold: 125,000Unsuccessful: 0Unsuccessful: 0Clearing: $.02
(the clearing price is the lowest price at which a successful bid was made)
 Total: 1Total: Lowest: $.02
   Weighted Average of Winning Bids: $.02
7 Year Advance Auction Results
AllowancesNumber of BidsNumber of BiddersBid Price
Bid For: 125,000Successful: 1Successful: 1Highest: $.02
Sold: 125,000Unsuccessful: 0Unsuccessful: 0Clearing: $.02
(the clearing price is the lowest price at which a successful bid was made)
 Total: 1Total: 1Lowest: $.02
   Weighted Average of Winning Bids: $.02
Spot Auction Winners
Bidder's NameQuantityPercentage of
Total Allowances
Amount Paid
C. Byden125,000100%$2,500.00
TOTALS125,000100%$2,500.00
7 Year Advance Auction Winners
Bidder's NameQuantityPercentage of
Total Allowances
Amount Paid
N. Johnson125,000100%$2,500.00
TOTALS125,000100%$2,500.00
Spot Bids (First Usable in 2024)
BidsBidder's NameQuantityTotal
$.02C. Byden125,000125,000
7 Year Advance Bids (First Usable in 2031)
BidsBidder's NameQuantityTotal
$.02N. Johnson125,000125,000

Total Auction Proceeds: $5,000.00

The  2024 ARP Auction Results Spreadsheet (xlsx) (13.5 KB)   provides the same results. Download an Excel viewer.

« Return to the directory of annual auctions listed by year

Clean Air Power Sector Programs

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Contact Us About Clean Air Power Sector Programs
Contact Us About Clean Air Power Sector Programs to ask a question, provide feedback, or report a problem.
Last updated on December 12, 2025
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