The county administration in Uppsala wants all municipalities in the area to put up signs warning of the risk of infection in the area, P4 Uppland reports.
“We have received instruction from the Swedish Board of Agriculture to inform municipalities about putting up signs at barbecue areas, picnic areas and bathing areas,” Mira Amin, a veterinarian employed by the county, told the radio station.
Signs in six languages will inform the public that leftovers should be thrown into the correct receptacles, and not left out so that pigs and wild boar can get to them.
African swine fever is not dangerous to humans, but can be lethal to boar and domestic pigs. The disease can be transmitted via food such as smoked sausage or ham, according to the Swedish Board of Agriculture.
Earlier this summer, it was reported that signs will also be placed at layby and rest areas on major roadways in southern parts of the country, where wild boar are known to roam.
The Swedish measure does not go as far as in neighbouring Denmark, however.
Copenhagen made the decision last year to erect a 70 kilometre-long fence along Denmark’s border with Germany to protect itself against the disease, despite experts questioning the effectivity of such a barrier.