They say you are what you eat, but it turns out that you are what you drink as well, at least when it comes to tap water. Scientists have discovered that they can determine where a person lives by studying hair samples. Hydrogen and oxygen left behind in hair samples were similar to those found in local tap water supplies. Even when researchers allowed for the fact that some people drink bottled water, the results stuck. These findings may be helpful in solving certain types of crimes.

Because the lake where our water comes from is quite polluted, drinking water is a big issue for me, big enough that I use an on-the-tap filter for cooking and drinking. If you ever wonder what's in your tap water and how it may affect your health, you'll want to read this series of posts over at Green Daily. It's chock full of good information about drinking water.