Prices are plunging at gas stations all over Milwaukee! While some are charging well below three dollars a gallon, others are still well above.Melody Sebbo was shocked when she pulled up to the BP at Oakland and Newton in Shorewood to see gas at $2.89.”I was like, ‘Oh my God! I can’t believe it; when did that happen?'” she said.Patrick De Haan, Head of Petroleum Analysis with GasBuddy, explains the low prices.”Demand for gasoline is starting to go down as temperatures cool off. Americans get back to the grind after summer. In addition, we’ve made the switch in most places back to cheaper winter gas,” he said.”Milwaukee and some of the near suburbs have to use a cleaner blend of gasoline in the summer,” he added.This is due to EPA restrictions.Wisconsin is one of 18 states with the average price of a gallon of gas below $3. Wisconsin’s average is …