Down in the waters near Science World, concern over sewage has been very real.
There is a solution, something I mentioned to Jake Costello at the CBC in 2018.
It was using the composting toilet technology to replace all the outgoing sewage, and product a compost we can use in the parks, or even sell on the market to deal with costs.

If it works out, it will start mitigating, and eventually it will conceivably eliminate a whole lot of needless waste in the Harbor.
It’s worth delving into, I’d rather like to even make it possible for builders to build this in new buildings and houses or adapt the system below the city on property lines. If they put in the expense they can sell the compost.
I recommend looking into this technological marvel, it may be the future.