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Here is the historical
phosphorus levels measured in past studies of Pattee Pond. The red line across the graph
represents the 12 parts-per-billion phosphorus. The Maine Department of Environmental Protection says
there is the possibility for algal blooms to occur in lakes in the range
from 12 parts-per-billion phosphorus.
As you can see, for much of its recent history Pattee Pond has been
above this level, and as with the transparency there is a natural
fluctuation, though there has been a decrease seen since the maximum in
1994. This is another point
which shows that through the past efforts of the Pattee�s Pond Association
and other residents, water quality in the lake has generally improved. However, not all is perfect, as I
will show you our findings for phosphorus levels at Site 1. [Click for next
slide]
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