Need to identify non UTF-8 characters in a text file? Here's a fast and handy
method using grep that highlights non UTF-8 characters with the "�" glyph:
grep -axvn '.*' data.csv
491:2012-08-23 18:10:00,"Lovers_Leap","KD",28,1,3,3,2,3,1,NA,"very stagnant