HARRISON TOWNSHIP (WWJ) – It may be perfect weather to hit the beach, but metro Detroiters will want to skip these two for the time being.

In Macomb County, the popular beach at Lake St. Clair Metropark remains closed Thursday as does the beach at St. Clair Shores Memorial Park due to e. coli concerns.

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Both have been close since Tuesday.

Macomb County health officials say e. coli bacteria sometimes gets into the water from improper waste connections to storm sewers, sewer overflows and storm runoff — which cold present a health risk to swimmers and those who come in contact with lake water close to the shore.

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In the case of Lake St. Clair Metropark, the Macomb Daily reports test results released by the Macomb County Health Department showed E. coli bacteria concentration of 632 colonies per 100 millilitres of water, or about double than what is considered safe at 300 colonies.

Lake St. Clair Metropark has a swimming pool and water slides, which remain open, for those who want to go in the water.

It’s unclear if either of the beaches would be back open in time for the holiday weekend.

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Check which Macomb County beaches are open and which are closed anytime at this link.