In Canada, tap water is perfectly fine to drink as is. There are some exceptions when it comes to more remote places, especially in some camping grounds, but they’ll tell you or write it somewhere if that’s the case.
I went to Iceland last year and the water’s very clean and safe! There’s no problem drinking it from the tap.
A project doesn’t have to be unique as a whole. You can always take an already existing idea and add your own twist to it (new UI, new feature, better optimisation, etc). What’s important is actually doing something instead of being stuck in an infinite loop of brainstorming idea.