Glossary of Terms:

  • CIG Index 
    A pipeline index published monthly that reflects the market value of natural gas in the Wyoming-Colorado area.
  • Market Index Adder 
    Charges above the commodity (gas) cost to cover transportation, storage and other components for the commodity.
  • NYMEX (New York Mercantile Exchange) 
    The natural gas commodity exchange on which gas futures contracts are purchased and sold to lock in gas prices.
  • Pass-On Rate (Regulated Rate) 
    Under this rate option, all commodity costs are directly “passed on” to the customer. The per-therm gas price will periodically change up or down due to fluctuations in the market.
  • Therm 
    The unit of measure used to determine the quantity of natural gas you are receiving at a particular rate. The typical household uses about 1,000 therms per year.