you might be happier, but that's just your emotions playing with you, no rationality. I see it all the times with colleagues - they have amazing tap water coming straight from Alps (it really tastes well) and 2 metres next to it vending machine with 2 euro per 0.5l plastic bottle. Well guess what they do every single effin' time...

most of bottled water is tap water in plastic bottles, potentially infused with mix of BPA and other if ever exposed to slight amount of sunlight. don't ever think they use some high quality inert plastics on that bottle, because they don't.

with true deep well/mountain spring you are getting potentially better quality prior to bottling, and no idea what in final bottle.

if you have really poor quality tap water where you live, that's your best choice. it still might not be a healthy choice though.

In your home? If you knew the water was that contaminated would you trust your home water treatment equipment to remove everything? In that situation I think I'd buy bottled water until things are resolved.