so it's the farms what about the houses around the lakes that fertilize and all the storm sewers

Algal bloom fouls drinking water in Indianapolis	<<>
Monday, May 03, 2010
INDIANAPOLIS — An early algal bloom has fouled the drinking water in up to a million homes in Indianapolis and its suburbs, The Republic reported. Compounds released by the blue-green algae have inundated the city’s water treatment plants, imparting an unpleasant, musty flavor and smell to tap water, according to the story. Officials said the musty flavor and odor will likely persist until chemicals kill the algae, the article stated. Jeff Robinson, Indiana-American Water Co.’s director of water quality, said the reservoir’s watershed is filled with farms, which can be a major source of nutrients that fuel algal blooms. “What we’re seeing is a combination of nutrients, the warmth and sunlight — it’s created a proliferation of blue-green algae,” said Robinson. The utility is applying activated charcoal at its treatment plant and is using carbon filters to reduce the water’s foul smell and taste, according to the report. To read the entire article, click here. For related information, click here.