Ok. If worried about drinking the water,what will you eat while there?
I'm not referring any single location or country.
Unwashed salads?
I know some people who used only bottled water to brush their teeth during a ten day stay in a South of the (US) border Country.
One of those who swore that he used only bottled water when brushing his teeth 'got sick as a dog."

Here's my question for you who will avoid the water.
Do you intend to spend your days unwashed?
If not, then how can you make sure you do not breathe in a single drop of water while showering?