These data sources have been cited by market participants as useful in assessing emission allowance markets. Some of these publications offer free trial subscriptions. This is not necessarily a complete or exhaustive list.

SO₂ Spot Market - Price and Regulatory Information

• Argus Air Daily
• Bloomberg
• Environmental Markets Newsletter (a John Lothian publication)
  
• Platts

 Emissions Data and Plant Outage Information 

• NOAA Climate Services
• Genscape
• National Climate Data Center
• U.S. Department of the Interior
• U.S. Energy Information Administration
• U.S. EPA Clean Air Markets 
• U.S. Nuclear Regulatory Commission

Regulatory Information

• Clean Air Report (produced by Inside EPA)
• U.S. Environmental Protection Agency

Forecasts and Analytic Research

• Cambridge Energy Research Associates
• ICF Consulting
• PIRA Energy Group
• Power and Analytic Resources
• Point Carbon

Associations

• Environmental Markets Association