In my last entry, I asked whether anyone had seen a particular map that lets you search for any natural gas fracking well in the country, click on it, and see a partial list of all the chemicals used in the hydraulic fracturing fluid. I tried searching for it online, but I thought that somebody had removed it. Turns out, it's still there, and I had it bookmarked all along. So let me share it with you.
Here it is. You don't need all the info on the well to find it; just do a search by state and county, and you can use the map from there. Note that it lists not just the chemicals but their concentrations as well. (It's the second column of percents). It also has a few other statistics, such as the last drill date and the depth of the drilling.
Also, for any of you who live in Texas, they have a map that shows not only the locations of the wellheads, but the actual points of fracturing and collection, which are often hundreds of yards away. (Note, this map has been unusually sluggish today.)
Use this information as you need.