This may sound like a dumb post, but my new place uses well water. I wouldn't have an issue so much, however, it smells terrible, leaves iron deposits all over the sinks, tubs, washing machine (yes, drives me crazy to know my clothes go through this), etc.
The worst was, we left the hose on, and when I came out a few minutes later, there was a rainbowish white residue all over the stream of water.
Since I have been here, I haven't washed my Taco or ZX6R. I go as far as washing them in the rain, LMAO!
Harmless or harmful to vehicles? OCD? Maybe! I might not care so much, although, I have two of the most delicate vehicles in their worlds. Fasteners tend to oxidize on Kawis and the Tacos are known for frame rust. Reduce, not induce, is my motive.