Blue-green algae is once again prompting worries among Kansas health officials.

According to the latest announcement from the Kansas Department of Health and Environment, public health warnings have been issued at seven public lakes in Kansas because of algae blooms.

Fort Riley officials say the fort’s marina is closed because of high levels of toxic blue-green algae at the north end of Milford Lake. The marina is expected to remain closed until the lake conditions improve. The south end of Milford Lake is open, but is under a public health warning, which means boating and fishing are allowed, but swimming is discouraged.

Beaches in a separate section were closed earlier after the Kansas Department of Health and Environment added the area to their blue-green algae watch list last week.

Health officials say some blue-green algae produce toxins that pose a health risk to people and animals. You can find out more here.

Here’s the list as of July 17:
BROWN CO. STATE FISHING LAKE, Brown County
CHISHOLM CREEK PARK LAKE, Sedgwick County
CONCANNON STATE FISHING LAKE, Finney County
LOVEWELL RESEVOIR, Jewell County
MEMORIAL PARK LAKE, Barton County
MILFORD LAKE – ZONES A & B, Geary County
MILFORD LAKE – ZONE C, Geary/Clay Counties RECOMMENDED CLOSURE
PLAINVILLE TOWNSHIP LAKE, Rooks County