There is a good thread on Reddit about this and I'll just quote what I read
Quote:
People are grossly misunderstanding how little a volume that is compared to what travels down the St. Lawrence River, and this article is certainly propagating that misunderstanding.
The St. Lawrence river has a discharge of 16,800m³/s, whereas this sewage rerouting will discharging 3.54m³/s of sewage, leaving a scant 0.00021% of the water supply consisting of sewage. While it's certainly not ideal to pump waste in the river, it isn't going to do any real harm to anyone.
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Quote:
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The St Lawrence river has a flow rate of 6,000 to 7,000 cubic meters per second.[1] . The sewage will be discharged at 12 cubic meters per second.
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https://www.reddit.com/r/worldnews/c..._of_untreated/
So in the grand scheme of things, it's not that bad. If anything plastic is the real concern for any aquatic life.
People poop. The only solution is to not poop.