In the week ending Aug. 1, one gas station in DuPage County sold premium gas at the lowest reported price of $4.87 per gallon, according to customer reports submitted to GasBuddy. The average reported price of premium gas across the county was $5.47 per gallon. DuPage County had 214 of 260 reported gas stations offering premium gas. For comparison, the average price of premium gas in Illinois was $5.39 per gallon for the week ending Aug. 1, up from the previous week. Lowest Reported Premium Gas Prices in Cities Associated With DuPage County in Week Ending Aug. 1Information in this article was obtained from GasBuddy.