Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Clean Air Power Sector Programs

2011 SO2 Allowance Auction

Allowances Available for Auction
Origin of Allowances Spot Auction
(First Usable in 2011)
7-Year Advance Auction
(First Usable in 2018)
EPA 125,000 125,000
Privately Offered 0 0
Total 125,000 125,000
Spot Auction Results
Allowances Number of Bids Number of Bidders Bid Price
Bid For: 550,131 Successful: 16 Successful: 6 Highest: $66.67
Sold: 125,000 Unsuccessful: 14 Unsuccessful: 3 Clearing: $2.00
(the clearing price is the lowest price at which a successful bid was made)
  Total: 30 Total: 9 Lowest: $0.06
      Weighted Average of Winning Bids: $2.81
7-Year Advance Auction Results
Allowances Number of Bids Number of Bidders Bid Price
Bid For: 375,160 Successful: 4 Successful: 4 Highest: $25.00
Sold: 125,000 Unsuccessful: 2 Unsuccessful: 2 Clearing: $0.16
(the clearing price is the lowest price at which a successful bid was made)
  Total: 6 Total: 6 Lowest: $0.08
      Weighted Average of Winning Bids: $0.17
Spot Auction Winners
Bidder's Name Quantity Percentage of Total Allowances Amount Paid
Ohio Valley Electric Corporation 84,869 67.895 $207,238.00
Indianapolis Power & Light 40,000 32.000 $142,000.00
Acid Rain Retirement Fund 68 0.054 $448.80
Bates College Environmental Econ A 25 0.020 $112.50
Bates College Environmental Econ B 23 0.018 $95.89
University of Tampa Environmental Protection Coalition 15 0.012 $1,000.05
TOTALS 125,000 100% $350,895.24
7-Year Advance Auction Winners
Bidder's Name Quantity Percentage of Total Allowances Amount Paid
Evolution Markets 124,840 99.872 $19,974.40
Acid Rain Retirement Fund 100 0.080 $100.00
University of Tampa Environmental Protection Coalition 40 0.032 $1,000.00
Bates College Environmental Econ B 20 0.016 $42.40
TOTALS 125,000 100% $21,116.80

Total Auction Proceeds: $372,012.04

Spot Bids (First Usable in 2011)
Bids Bidder's Name Quantity Total
$66.67 University of Tampa Environmental Protection Coalition 15 15
$6.60 Acid Rain Retirement Fund 68 83
$4.55 Bates College Environmental Econ B 11 94
$4.50 Bates College Environmental Econ A 25 119
$4.43 Indianapolis Power & Light 5,000 5,119
$4.17 Indianapolis Power & Light 5,000 10,119
$3.93 Indianapolis Power & Light 5,000 15,119
$3.82 Bates College Environmental Econ B 12 15,131
$3.67 Indianapolis Power & Light 5,000 20,131
$3.43 Indianapolis Power & Light 5,000 25,131
$3.17 Indianapolis Power & Light 5,000 30,131
$3.00 Ohio Valley Electric Corporation 20,000 50,131
$2.93 Indianapolis Power & Light 5,000 55,131
$2.67 Indianapolis Power & Light 5,000 60,131
$2.50 Ohio Valley Electric Corporation 35,000 95,131
$2.00 Ohio Valley Electric Corporation* 35,000 130,131

Bids below this line were unsuccessful because they were below the clearing price of $2.00.
 
$1.80 LUME 15,000 145,131
$1.50 Ohio Valley Electric Corporation 25,000 170,131
$1.35 LUME 20,000 190,131
$1.00 Ohio Valley Electric Corporation 10,000 200,131
$0.98 Constellation Energy Commodities Group, Inc. 10,000 210,131
$0.90 LUME 30,000 240,131
$0.75 Constellation Energy Commodities Group, Inc. 25,000 265,131
$0.50 Constellation Energy Commodities Group, Inc. 25,000 290,131
$0.49 Constellation Energy Commodities Group, Inc. 20,000 310,131
$0.45 LUME 60,000 370,131
$0.31 Constellation Energy Commodities Group, Inc. 20,000 390,131
$0.28 Indianapolis Power & Light 10,000 400,131
$0.20 Constellation Energy Commodities Group, Inc. 25,000 425,131
$0.06 Evolution Markets 125,000 550,131

*Awarded a partial fill of 29,869 out of 35,000 allowances bid for.

7-Year Advance Bids (First Usable in 2018)
Bids Bidder's Name Quantity Total
$25.00 University of Tampa Environmental Protection Coalition 40 40
$2.12 Bates College Environmental Econ B 20 60
$1.00 Acid Rain Retirement Fund 100 160
$0.16 Evolution Markets* 125,000 125,160

Bids below this line were unsuccessful because they were below the clearing price of $0.16.
 
$0.11 LUME 125,000 250,160
$0.08 Constellation Energy Commodities Group, Inc. 125,000 375,160

*Awarded a partial fill of 124,840 out of 125,000 allowances bid for.

The 2011 Auction Proceeds Spreadsheet (xls) (69 KB)  provides the same results. Download an Excel viewer.

« Return to the directory of annual auctions listed by year

Clean Air Power Sector Programs

  • Basic Info & Site Map
  • Electric Power Sector Basics
    • Power Sector Evolution
    • Health & Environmental Impacts
    • Power Sector Programs
  • Programs & Progress
    • Progress Report
      • Program Basics
      • Emissions Reductions
      • Emissions Controls & Monitoring
      • Program Compliance & Market Activity
      • Air Quality
      • Acid Deposition
      • Ecosystem Response
    • Power Plant Emissions Reductions
    • Latest Emission Comparisons
  • Program Implementation
  • Data & Tools
    • Power Sector Data
    • Summary Data
    • Allowance Data
    • Environmental Monitoring
Contact Us About Clean Air Power Sector Programs
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 4, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.