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Toxic Algae in Lake Needwood
Lake Needwood is a 75 acre reservoir located in Derwood, Maryland. The lake was created to provide flood control to Rock Creek and to protect the creeks water quality by acting as a retention basin to trap sediment from stormwater runoff.

This past fall Lake Needwood posted warning signs to “Avoid contact with Lake Water” after testing positive for toxic algae. Harmful algal blooms are often triggered by excessive levels of nutrients such as nitrogen and phosphorus. The excess nutrients come from many sources such as aquatic plants and fertilizers and stimulate the growth of algae.

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Scientists Identify Cause of the "Sea Fangle' Phenomenon - Scientists say that the phenomenon of sea fans washing up on the coastline of the South West will continue unless more is done to prevent commercial and domestic plastic pollution from entering into the marine environment.


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