"Undrinkable water" refers to water that is unsafe or unfit for human consumption. It can be contaminated or polluted with harmful substances, making it dangerous to drink.
Full definition
He encounters a group of dingo-esque beasts that are intent on ripping him apart (he soon steals a pup and raises it as a viciously loyal pet), and when he falls into a pool
of undrinkable water, it is only to find himself surrounded by eels.
Unfortunately, the «purified water» tap at the kitchen sink produced salty, sulfur -
smelling undrinkable water, which was a shame.
Flint, Michigan, for example, has received recent national media attention over the last several weeks for its unsanitary,
undrinkable water supply.
Accidentally
consuming undrinkable water or unfamiliar foods or suffering from changes in altitude or weather could cause illness and require a trip to the emergency room.
Pessimistic tourists will complain about congested streets, smoggy air, and
undrinkable water.
Without suitable emissions control technology applied to coal wood etc.; the environmental impact renders an uninhabitable environment anyway with unbreathable air and
undrinkable water.