The right solution is installing a reverse osmosis filter system (which includes mechanical and charcoal filters) at the house or tap level. Water's not one of those things people should cheap out on. We, as a society, can afford to not have this be an issue. We're not quite to that realization yet.
To be clear: I'm not saying the burden of cost should be solely put on renters/homeowners.
To be clear: I'm not saying the burden of cost should be solely put on renters/homeowners.