when I was growing up. It smelled and tasted terrible but it wasn't to a level where it was bad for you. It was finally solved with a filtration system and chlorination.
It wasn't a cheap alternative then but I think the prices may have come down since. Most water treatment, well drilling companies should be able to check and offer you options.
A couple of sites with decent info for you. I have no interest in any water treatment companies BTW, they just offer some ideas.
http://www.excelwater.com/eng/b2c/h2s.phphttp://www.water-research.net/sulfur.htm