We can use high school physics here. We suck up the Flint river water, up 1m. Mains, solar panels or wind turbines will supply the power.
It boils – leaving behind all lead and other toxins. We suck out pure water vapour. We may wish to add salts – see Perrier Quality Report - Nestlé Waters North America
The amount of energy is 1W. Per 1,000L of water vapour. We pipe it to a high reservoir, add the salt and vent the gas.
Which condenses and falls as liquid water.
Reporting by Jan Sanburn Time magazine