Sampling of a number of lakes in Suffolk County this week confirmed in some the widespread presence of harmful algae, which produce or have potential to produce toxins, the state Department of Environmental Conservation said Friday.

The blooms fall under the category of fresh water blue-green algae, a DEC spokeswoman said.

It’s best to avoid swimming, boating and any other forms of recreating in the water, as well as drinking it, she said. Should your skin come in contact with the water, it’s best to check with a health care professional.

Lakes where the blooms were found to be widespread are: Maratooka Lake, Old Town Pond, Wainscott Pond South, Lake Agawam, Georgica Pond SW, Georgica Pond South, Kellis Pond, Sagaponack Pond and Mill Pond.

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The algae was also found, but was not widespread, in the Stony Brook Duck Pond.

For more information, see the DEC’s webpage on harmful algal blooms.