I carry 1500 gals in
steel tanks that are painted on the inside and filled with rainwater regularly and a separate 325 gal plastic farm tank with municipal water. I can't honestly taste the difference, it's all good. I used to add a little bleach now and then but don't bother any more. But I'm also one of those people that don't get sick eating street
food in faraway lands. Your bowels will let you know real quick if you've got a problem, so if they're not talking to you, don't worry about it.