I wonder if there's a market for a company that analyzes the mineral makeup of different cities'/regions' tap water, and sells an on-faucet water softener/filte

I wonder if there's a market for a company that analyzes the mineral makeup of different cities'/regions' tap water, and sells an on-faucet water softener/filter that can be configured with different "mineral pods" to match the water taste of your preferred region. New Yorker living in Texas? Don't worry, you can still get that great NY Watershed taste coming right from your tap!