If the water looks and smells bad, it may be toxic

Earthy or musty odours, along with visual evidence of blue-green algae, also known as cyanobacteria, may serve as a warning that harmful cyanotoxins are present in lakes or reservoirs. In a newly published USGS study of cyanobacterial blooms in Midwest lakes, taste-and-odour compounds were found almost every time cyanotoxins were found, indicating odour may serve as a warning that harmful toxins are present...

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