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7.15.13 Dry weather and low E.coli throughout the watershed
By: friendv3 (friendv3) 2013.07.16

Dry weather and low E.coli throughout the watershed

Link to pdf of results from July 15th, 2013

Sampling results from the fourth round of Friends of the Mad River’s Mad River Watch volunteer water quality program show all sites with favorable swimming conditions, with no sites testing above the Vermont Health Department’s water quality standard for E.coli in recreational waters (235 colonies of E.coli per 100 mL water).

E. coli is a type of coliform bacteria and is used as an indicator of pollution from human or animal waste and the potential presence of disease causing organisms.  It is estimated that at the level of 235 colonies E.coli per 100 mL water, approximately 8 out of every 1,000 swimmers are likely to contract a water borne illness related to fecal contamination.

At the time of sampling Monday morning, the flow condition of the Mad River was low and declining at about 275 cubic feet per second (cfs), as measured at the USGS gage in Moretown.  Median flow for this date is approx 102 cfs.  A welcome spell of dry weather this week has brought flow levels closer to average levels throughout the watershed. E.coli levels have been consistently low this summer, probably due to the flushing effect of the rainy spring and early summer.  For more information about E. coli and the Mad River Watch program, to view our most recent complete data report please visit the Friends of the Mad River website  Friends is a membership organization, and depends on the generous contributions of members to continue the Mad River Watch and other programs; learn how to become a member and donate securely online at our website.

Many thanks to this week’s Mad River Watch volunteers: Susy Deane, Mike Ware, Fran Plewak, and Maxine Grad.  Also, many thanks to Cyndee Button, our volunteer Lab Coordinator and Chase Fortier for assisting with data entry.


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