Lake Water Quality 2006 Report - Lakefield Herald

WS1 had a count of over 100 on July 24/04; could the cause possibly be the same asthis year’s high counts on July 14 and July 24? The site is near some small streamsthat drain from agricultural land. It would be interesting to investigate thesestreams, but the high counts tend to come and go very quickly.SB1 had higher counts than last year. This is an area where cows have been seenwalking in the water.To put the results in perspective:• 100 E.coli/100 mL is the level at which public beaches are posted unsafe for swimming;• Kawartha Lake Stewards Association believes the safe swimming level for our lakes should be more stringent than this,and have set the acceptable level at 50 E.coli/100 mL. KLSA regards counts over 50 as cause for concern;• Counts 20 and below, with an occasional reading between 20 and 50, are normal for the Kawartha lakes;• A “-“ indicates no data available for that date.Upper Stoney Lake: Upper Stoney Lake Assoc.2006 E.coli Lake Water TestingE.coli/100 mLSite No. 4-Jul-06 17-Jul-06 24-Jul-06 31-Jul-06 8-Aug-06 5-Sep-06 6-Sep-066 6 4 6 6 10 0 -20 17 7 3 0 5 0 -21 11 2 0 5 3 0 -52 5 14 11 12 10 - 1756 2 3 1 0 2 1 -62 0 19 0 6 0 5 -63A 3 1 0 0 0 0 -65 1 42 0 3 23 1 -70 7 0 0 1 3 0 -78A 1 2 6 2 0 0 -85 1 1 0 2 1 - 099 0 2 0 1 2 - 1Upper Stoney LakeAs in other years, counts throughout Upper Stoney Lake were uniformly low.79