/ck/ - Food & Cooking

As always, get your water tested by a local service. You have to know what's in the water to know what kind of filter to get- there's no point paying for filtration you won't use!- and the local guy probably has a good general idea of what's in the area so he can stock the appropriate filters.
Not to mention you'll need a solid supply of filters for the future, they do need to be replaced now and then.