Is this possible? Glowing blue tap water reported in Minamisoma, just north of meltdowns

This sounds so very nuts to me but....
is it actually possible for water to glow blue?? Wouldn't there have to be a large quantity of radioactive materials present? And wouldn't that material, not the water be what is glowing?

http://enenews.com/ngo-glowing-blue-tap-water-reported-in-minamisoma-jus...

http://fukushima-diary.com/2012/03/tap-water-glows-blue/

Sure it's possible

http://www.furryelephant.com/content/radioactivity/nuclear-power/cerenko...

Blue light is emitted when the electric field snaps back to its original shape
After the beta particle has passed, the electric fields of the water molecules settle down and the molecules return to their random orientation.

As the electric field of each water molecule returns to its original shape, a photon of blue light is emitted.

DOUBTFUL - more likely Copper Hydroxide

The previous poster is referring to the phenomenon of Cherenkov radiation which is seen when highly energetic charged particles traverse a transparent medium. In fact, the charged particles have to be so energetic that their velocity exceeds the velocity of light in water. ( Relativity prohibits faster than the speed of light in a vacuum, but light slows down in water ). The index of refraction for water is approximately 1.3, so light slows down by its inverse or 75% of the speed of light in a vacuum.

Therefore, in order to see Cherenkov radiation in water, you need an extremely intense source of very high energy charged particles with velocities in excess of 75% of the speed of light in a vacuum. One has such conditions in the core of a nuclear reactor:

http://en.wikipedia.org/wiki/Cherenkov_radiation

Doubtful that the OP has nuclear reactor conditions in the tap water. This is probably due to a water chemistry problem and not Cherenkov radiation as suggested by the poster above.

A few years ago, the San Francisco East Bay city of San Ramon had trouble with "blue water". The reason was discovered by former UC-Berkeley Professor and talk show host, Dr. Bill Watternburg. As I recall, it had to do with the buried power lines promoting a type of corrosion of the water piping.

http://www.pushback.com/Wattenburg/bio/BlueWater.html

I would have the tap water tested for copper hydroxide and completely DISREGARD the suggestion that the blue water is nuclear in origin.