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7 Things You Need To Know About The Toxin That’s Poisoned Ohio’s Drinking Water http://b4in.org/b6f1

This satellite image provided by NOAA shows the algae bloom on Lake Erie in 2011 which according to NOAA was the worst in decades.

Approximately 400,000 people in and around Toldeo, Ohio are being warned not to drink their tap water after high levels of a dangerous toxin were discovered in the water supply Saturday, according to the Toledo-Lucas County Department of Health.

The toxin is called microcystin, the high levels of which were caused by massive increases in algae on Lake Erie. The increases in algae, called “algae blooms”, are poisonous if consumed — causing abnormal liver function, diarrhea, vomiting, nausea, numbness, and dizziness.

Boiling the water doesn’t help — in fact, it increases the presence of the toxin.

As of now, it’s unclear when Toledo residents will have clean water again. According to the Toledo Blade, fresh water samples are being flown to a specialized U.S. Environmental Protection Agency laboratory in Cincinnati, which will determine the extent of the contamination.

Here are 7 things you need to know about microcystin — what it does, why it’s there, and why it’s spreading in the five Great Lakes that form the largest system of fresh water in the world.

Toxic Algae Blooms Threaten Public Health

The threats posed to both public health by microcystis, the bacterial released from algae blooms in Lake Erie, are vast. Along with the dangers of ingesting the toxin, the algae also causes skin rashes and burns when touched, threatening swimming, boating, and other lake-related tourism industries.

In Toledo, people with liver problems have been told not to take showers or wash their hands with the tap water.

Animals are especially sensitive to the toxin, and public health officials in Toldeo have warned people not to let pets drink the tap water either. Microcystis has been known to kill dogs and livestock.

And though no human deaths have been recorded in the United States, Circle of Blue points out that the toxin once killed 76 people at a dialysis center in Brazil in 1996.

The Health Of Lake Erie Is Also Suffering

Human health is not the only thing at risk from rising algal blooms. The microcystis released from the algae can cause enormous dead zones in the water, killing off fish and other marine life.

As noted in a Circle of Blue report, when algal blooms sink to the bottom of the lake and die, the decomposition process uses up so much oxygen that nothing else can live on the bottom of the lake. Lake Erie has always had some seasonal dead zones, but those have grown bigger in recent years as algal blooms get larger, the report notes.

Humans Are Causing The Toxin To Multiply Faster

Algal blooms themselves are not a new phenomenon, but the increasing enormity of them are — and that can be attributed to human activity.

Experts say one of the biggest reasons for the severity of this algal bloom is excess phosphorus runoff from urban and industrial agricultural lands, as well as from waste water from sewage treatment plants.

NOAA notes that this increased runoff into the lake is largely due to poor farming practices, such as high use of fertilizers and presence of livestock near water supplies. Pesticides also impact the blooms, NOAA says.

As Climate Change Worsens, So Will The Toxin
Rising temperatures and increasing carbon dioxide concentrations are also making the problem worse, according to scientists at Oregon State University and the University of North Carolina at Chapel Hill.

As the scientists told Ecowatch in a 2013 report, the microcystis bacteria thrive in warm, nutrient-rich waters. The microcystis-laden algae also survive better in those warmer conditions than other, non-toxic algae does. They’re the “cockroaches of the aquatic world,” according to the report.

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