Although our local water is not too bad, I have always use a 1 micron filter, made by GE that supplies the darkroom, and another in the kitchen for drinking water.
I have a friend who is an environmental engineer, and he said the most dangerous health issue in the local environment was city water, in his opinion.
The 1 micron filter takes out chlorine and all manner of stuff, so I never have to mess with distilled or de ionized. The housings are plastic, cost about $60, and the cartridges, which last six months or more, are about $30.
When I change cartridges, you would not believe what is trapped, so I am happy with the solution.