Annual DDDC Recalculation In Effect Sept. 1
Factored into the base charge on your gas bill, the Dedicated Design Day Capacity Charge (DDDC) covers common costs of delivering gas to your home. This charge is based on each individual customer’s demand on the pipeline system during the coldest day of the year. This method is used to allocate each customer's share of the total cost of the delivery system.
Each year, Atlanta Gas Light Company (AGL) recalculates DDDC for every customer account to ensure the data represents the most recent usage patterns. Recalculation takes place in August and will go into effect for billing after September 1, 2017.