Regular gas price per gallon
: $2.99 Tax per gallon
: 16.8 cents (4th lowest) Number of operating oil refineries
South Carolina has the lowest average gas prices in the nation, and is the only state currently under the $3 per gallon mark. Compared to last year, gasoline prices in the state have decreased by 10.5% — tying Mississippi for the highest proportional decrease in the country. Low prices in South Carolina are likely due in part to the low tax per gallon of 16.8 cents, which is the fourth lowest in the country. South Carolina’s prices have fallen by about 19% since their early April peak of $3.70.
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