Water Quality Update | August 8, 2016

Reported by Mike Hanson

Water Quality Update

The results of the samples taken on Monday August 22nd indicate that the water in the well mixed main body of the lake has returned to safe levels.  However, the coves, particularly the heavily matted ones remain at very high counts of Microcystins.  Contact with water in the coves should be continue to avoided and caution should continue to be exercised even in the improved areas.

Lake Savers

As mentioned in the update last week, Lake Savers is here this week treating the algae mats in the heavily impacted coves.  The expectation is that the algae will turn brown, break-up and dissolve over the 48 hours.  In addition, additional Nutrizorb was added to the main lake to further reduce the nutrients to stop the growth at the source.

Letter from a Resident, Laura Majecky

“I have read many Facebook posts that call for the chemicals back …really?  For those who want them back, do you realize that those same chemicals are the reason the lake is in the shape it is in today?  Copper sulfate killed all the vegetation, which settled and became the toxic muck on the bottom, which in turn depleted the oxygen levels in the water to a critical level.  The aeration system has only been for 1 year come September, you must have patience.  I texted John Tucci and asked him to give me some statistics I could share, to show how far we have come in less than 1 year.
‘The organic matter (muck) through the main part of the lake has been reduced by 66%. Sediment phosphorus has been reduced by more than 80%.  This is great for the long term health of the lake. Water column Phosphorus is down 19% over last year, but still has a long way to go.  The lake was clear through the end of June and started to green up around 4th of July.  We were able to clear it up for 2 – 3 weeks, but then have been unable to stop the blue green from taking over the last month.  Right now some cooler weather would help the most.  We are optimistic about the treatment we will do next week. Also, blue green algae is highly temperature driven.  So the very high water temperatures (above 85 degrees) for the last month really create the perfect environment for the blue green growth.  We think this is why it has been able to come back so quickly after our most recent treatments.’

“I personally fought very hard to get Lake Savers here so we could fix our lake naturally instead of dumping chemicals, some toxic, in the lake.  The chemicals are only a quick fix, that eventually cause more damage in the long run.  The lake is not a pool …it is an intricate ecosystem that we almost destroyed with chemicals.  It took 50 years to get to this point; it is gonna take more than a year to fix it.  Would you have rather spent over $350,000 dollars on an alum treatment that was not guaranteed and would leave us with a lake bottom of toxic muck that would need hazmat if we would try to remove it (dredging)?  Give it time, please have patience.”

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Small experimental aerator working in McClellan Drive

 

 

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