http://www.digitaljournal.com/article/260175

Montreal Study Finds Estrogen Flooding Rivers

Posted Sep 22, 2008 by Bob Ewing
Liza Viglino has conducted a study that states the Montreal water treatment plant dumps 90 times the critical amount of certain estrogen products into the river:
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Liza Viglino is a postdoctoral student at the Université de Montréal's Department of Chemistry, at the NSERC Industrial Research Chair in Drinking Water Treatment and Distribution.
Viglino has conducted a study that states the Montreal water treatment plant dumps 90 times the critical amount of certain estrogen products into the river: it only takes one nanogram (ng) of steroids per liter of water to disrupt the endocrinal system of fish and decrease their fertility.
Viglino is under the supervision of Professors Sébastien Sauvé and Michèle Prévost.
The presence and effects of estrogen residues on aquatic wildlife have been well documented.
Viglino’s research is unique because it considers natural hormones and those used in oral contraceptives and included products used in hormone therapy that is prescribed to menopausal women.
Her data indicates that 128 million contraceptive pills and 107 million doses of hormone therapy are consumed every year in Quebec.
Viglino took water samples in five different spots: the Mille-Îles river, the St. Lawrence River, the two water collectors entering the Montreal treatment plant and at the exit of the plant.
The only compound detected in the St. Lawrence River was estradiol, a natural hormone. The water still contained 90 ng of estradiol per liter after being treated.
"If other products weren't detected it doesn't mean they aren't present," says Viglino.
"Our method doesn't detect amounts lower than 7 ng per liter."
Professor Sauvé states ozone treatments could eliminate these hormonal compounds. Sauvé also stresses that 80 to 90 percent of antidepressants remain in the water after treatment. These molecules can have a variety of effects on aquatic wildlife and again ozone treatment could destroy these molecules.