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Posted on: July 5, 2017

Sewer Dye Testing: River Will Turn Green

Sewer dye testing is conducted to detect leaks in the sanitary sewer system. You will notice that Underwood Creek and the Menomonee River water will turn bright green during this time.

How does it work? Storm sewers are filled with green-dyed water.  Cameras will then be placed in sanitary sewers to detect leaks. If the green dye shows up in the sanitary pipe system, it indicates a repair is necessary. Eventually the dye flows out to the creeks/rivers, which is why you may seen green dye or water in these water ways. The Milwaukee Metropolitan Sewer District and Wisconsin Department of Natural Resources are both aware of the testing, which is non-toxic and will not harm the water or wildlife.
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