Well, that point is a major problem,it is up to one's choice to either believe it is alright to drink the water in one's area, or bottled water.
Bottled water isn't always safe either. You can have your water tested if it makes you feel safer.
This is getting off topic, but everything has become polluted in one way or another,sadly, we have to research almost everything we consume to feel safe.
As respect to the poster's,I'm going to go back on topic, and see whatever ways or who to contact to dispose meds. safely.
I hope to get some valid direction or answer from a local company or pharmacy, and then come back and add to this reply.
It may take me awhile, this awful heatwave has caused me not to do anything.
Take care,
DE