Fish seems to be a pretty popular dish in Junkertown, you can see it being prepared in a couple of places on the map, as well as on the takeaway menu.
If you look outside the city the two main food sources would be the forested area and the river, there don’t seem to be any agricultural efforts at all.
So if all the fish in Junkertown are coming from that river…
Junkertown dumps waste right into its main food source.
Eating polluted fish won’t kill you right away, but chemicals absorbed by fish can be absorbed by the humans that eat them, possibly causing cancer, liver disease, nervous system damage, impaired mental development, and if eaten by anyone pregnant can cause fetal damage.
Blizzard probably didn’t think too much about the food supply in Junkertown, as it’s inspired by the nonsensical world of Mad Max, but…
Impaired mental development, nervous system damage causing tics, and possibly a missing limb due to poor fetal development?