

State officials have already said that the algae may be particularly bad this year because of low river rivers and warm temperatures.

The new county warnings do not mention specific areas of concern, but recommend people avoid swimming or wading where there are visible concentrations of algae or scum.

The warning also applies to jet-skiers, water-skiers and windsurfers.

The county also recommends that people avoid eating fish livers or digestive organs, and fillets should be washed with tap water or bottled water.

Children and pets may be particularly vulnerable to the algae.