Gasoline problems at the 7th Street S&S Food Mart in Cordele are under investigation after the Cordele Police Department received complaints on Friday.
The Georgia Department of Transportation went out and closed the pumps on Friday after the gasoline failed a visual test.
Samples of three grades of gasoline were sent to a Tifton lab.
Rich Lewis with the Georgia Department of Agriculture says that he received notice Monday morning that all three samples tested positive for contamination.
The regular unleaded gas sample tested positive for an unknown substance. The mid-grade unleaded type was also contaminated, and super premium gas was contaminated with water.
Lewis says that at least four customers complained about the gasoline.
The pumps will be closed at the Food Mart until the issue is resolved which could take one or more weeks.