Officials have canceled a no-swim advisory for the Dubois Park Lagoon in Jupiter after new samples showed safe levels of bacteria in the water.
An advisory issued Tuesday remains in place for Lake Worth Beach, the Florida Department of Health said.
Levels of enterococcus in the waters at Dubois Park, off the Loxahatchee River near the Jupiter Inlet, dropped to 10 from 910 in testing done since Tuesday.
A recent sampling in Lake Worth showed an increase in bacteria colonies, to 531 per 100 milileters of marine water from 190. A safe rating is 70 colonies or fewer.
Enterococcus is known to cause stomach distress and infect cuts.
Authorities said the causes of the bacteria are unknown but are generally associated with runoff following heavy rains, high surf from high winds and tides, heavy recreational use or wildlife.
New tests at Lake Worth will occur within the next few days.