What health problems may arise from this metal water pollution?

Heavy metals tend to accumulate in our body tissues, building toxicity over time.In our case, heavy metals in fresh water get absorbed by tiny organisms that in turn get consumed by larger ones up to fish, which we then catch and eat. The effects are not immediate, but since heavy metals don't tend to be removed from our bodies, they build up. The more contaminated foods we eat, the more the metals build up until they reach toxic levels.