Without a recent rain "washing" event to send agricultural, human and pet waste into The Valley's rivers and streams, local swimmers are more likely to encounter safe swimming conditions in this low and declining water flow. Warren Riverside Park's higher E. coli level could indicate a more constant source of contamination such as a failed septic system or a localized in-stream source such as wading cows, horse manure at a stream crossing, or wildlife such as deer, moose or beaver. To help avoid localized contamination, Valley residents are strongly encouraged to clean up after their pets anywhere near the Mad River or its tributaries.
Even though the E. coli levels are favorable at the moment, swimmers should consider recent weather and upstream activities as factors that may affect water quality. A rainstorm that turns the Mad River's waters brown with sediment would probably increase the E. coli levels significantly in many of the popular swimming areas.
For more information about E. coli and the Mad River Watch program or to report a river-related illness call Friends of the Mad River at 496-9127. Thanks to this week's Mad River Watch volunteers Kathryn and Pam Barnes, Lisa Koitzsch, Elisabeth Osborn, Jay Meadows, Fran Plewak, Elizabeth Walker, Kinny Perot and Lynn Wawrzynek.
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