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TOLEDO, Ohio (AP) — The toxins that contaminated the drinking water supply of 400,000 people in northwest Ohio didn’t just suddenly appear.
Water plant operators along western Lake Erie have long been worried about this very scenario as a growing number of algae blooms have turned the water into a pea soup color in recent summers, leaving behind toxins that can sicken people and kill pets.
In fact, the problems on the shallowest of the five Great Lakes brought on by farm runoff and sludge from sewage treatment plants have been building for more than a decade.
While residents around Ohio’s fourth-largest city were being told to avoid drinking tap water for a second day, discussion began to center around how to stop the pollutants fouling the lake that supplies drinking water for 11 million people.
‘‘People are finally waking up to the fact that this is not acceptable,’’ Toledo Mayor D. Michael Collins said Sunday.