Years ago, I actually read the annual water quality report that came with our bill. I recall a comment indicating that federal standards allowed for chlorophyll coloring in the water...which I took to mean it could be a bit green.

Other than a brief visit to Greenville Mississippi where the water is "tea colored" , I had never in my life seen coloration in tap water. When we moved to a semi-agricultural area of Southern Indiana, I noticed a tinge of color in the jacuzzi...which prompted me to read the water quality report...but it never bothered me.

Tonight, I'm staying in the heart of downtown Indianapolis. My room has a garden tub...and I took a hot bath in the squeaking clean, white tub.

Guess what! Very green tinted water! In the heart of the 12th largest city in America!

So, it got me thinking...is the coloration due to organic matter in the water or due to refraction of light?