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Sustainable Fish Farming?

Is this sustainable practice? There are many cases of so called sustainable practices across the globe. But question here is how fit the fish raised in sewage for human consumption? Even if with full or partial treatment, there is a lot left in the wastewater to get accumulate in the fish due to their higher tolerance towards toxic substances. We can count many pollutants of interest e.g. detergents, PPPs, Trace Elements, Micro Pollutants, list could be exhausting. If fish for human consumption is raised in such waters, is there any study conducted to assess the edibility of the fish? Is there any database available which describes how much pollutants of concern are getting accumulated in fish and to what level they could affect human beings?