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Dairy Waste Still Polluting City Water Supply
Dairy waste is still polluting a lake that supplies tens of thousands of Central Texas residents with drinking water, a new study finds.
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(June 17, 2008)--A new study finds that algae-causing phosphorus levels in Lake Waco's water are still twice what is desired, despite manure removal from an upstream watershed that feeds into the lake that's blamed for tainting the drinking water's taste and odor.
Ken Wagner of the scientific firm ENSR, which did the $1.8 million study for the City of Waco, says the city could buffer the effect of high phosphorus levels by aerating the lake, stocking it with predator fish and experimenting with calcium additives.
But he says the key to fixing the problem lies with Erath County dairies up the North Bosque River, which account for some 55 percent of the lake's phosphorus.
The study focuses on 2002 through 2006, when dairies used government grants to remove half a million tons of manure from the North Bosque watershed.
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