(AP) — The state had lifted a warning advising people not to swim or drink water Lone Star Lake in Fillmore County.

The Nebraska Department of Health and Human Services says there are currently no health alerts for any lakes in Nebraska.

Last month, the department issued the warning for Lone Star Lake because it had a high level of microcystin, a toxin released by strains of blue-green algae.

Skin exposed to the toxin can develop rashes and blisters. Someone who drinks water containing the toxin is at risk for headaches, nausea and muscular pain.

Lone Star is the only lake this year to go under alert. Officials began conducting weekly tests at 50 public lakes across the state in early May, and the tests will continue throughout the summer.