Flint water that has been in the presence of iron for five days takes on a reddish cast while Detroit water does not. Image is Figure 3 found at http://flintwaterstudy.org/2015/08/why-is-it-possible-that-flint-river-water-cannot-be-treated-to-meet-federal-standards/ by Dr. Marc A. Ewards and Siddhartha Roy.
{"Image Artist": "Jim White", "Image ExifOffset": "2132", "Image XPAuthor": "Jim White", "Image Padding": "[]", "EXIF DateTimeOriginal": "2016:01:22 11:10:12", "EXIF DateTimeDigitized": "2016:01:22 11:10:12", "EXIF SubSecTimeOriginal": "80", "EXIF SubSecTimeDigitized": "80", "EXIF Padding": "[]"}