High levels of toxic algae have been found in Mirror Lake in Edina, prompting officials to warn residents and others to keep themselves and their pets clear of the lake.
Recent water samples collected by the Nine Mile Creek Watershed District revealed high levels of blue-green algae, which appear in bright-green blooms and are associated with the toxin microcystin. Exposure to microcystin may harm the liver and kidneys and in rare cases even cause death. Symptoms include jaundice, shock, abdominal pain, nausea and severe thirst.
The watershed district will collect another sample later this month to determine whether anything has changed. The district issued similar warnings in 2016 and 2017 about Lake Cornelia.
KEVIN DUCHSCHERE
RAMSEY
City seeks to improve water treatment
The Ramsey City Council is looking to hire a firm to analyze the city's groundwater and design a central treatment facility to reduce manganese and iron contaminants in the municipal water supply.
The state Department of Health told city officials earlier this year that several municipal wells had manganese concentrations above state standards. The city switched to water from wells with lower levels of manganese, but those wells produced rusty-colored water with high iron content.
The council wants to scrutinize the city's Tunnel City/Wonewoc aquifer, develop a water system model and recommend a design for a facility to treat water contaminants. The council tentatively plans to select a firm in October.
KEVIN DUCHSCHERE