The Manatee County Utilities department will be testing the sewer lines on Anna Maria Island from April 19 through May 14.
The test will involve putting smoke into the lines and checking for leaks. The tests will be performed on North Shore Drive from Magnolia Avenue to the northern tip of the island.
The smoke is a nontoxic white smoke that crews force in the sewer to locate breaks.
"We would like to get the word out so people will not become alarmed if they see smoke coming out of the ground," a county government news release states.