North Carolina's Ag commissioner Steve Troxler says that one of the most common questions they get from the public is whether gas stations are required to notify customers if the gas being sold contains ethanol. Currently, gas stations are not requried to label gasoline containing ehtanol, but many stations have voluntarily posted labels on their pumps, even though they didn't have to.
Commissioner Troxler says that will be changing. Earlier this year, the General Assembly passed a bill calling for the adoption of rules related to the labeling of gas pumps that offer ethanol-belnded gasoline for retail sale. The Gasoline and Oil Inspection Board will be responsible for coming up with these rules, and it will be up to the Standards Division to made sure stations comply with them.
An estimated 95% of gas stations in the state sell gasoline blended with ethanol, but the percentage of ethanol in the gas varies, but in most cases it's 10% or less.