I have not seen FrackNation, and so I cannot definitively comment on its accuracy. But the promotion of the movie and its YouTube clips have me concerned about its discussion of the real problem of methane migration that can happen as a result of gas drilling mistakes. http://www.youtube.com/user/noteviljustwrong.
There are two ways methane can be in water wells. First, the methane can be natural, "biogenic" or there before any drilling takes place. It is certainly true that some people living on water wells can have high levels of methane in their water, even levels high enough to make their faucet water catch fire, because of naturally occurring methane. Making this point clearly is important and helpful. And Gasland certainly did not do so.
The second way methane can be in some water wells is because of mistakes in gas drilling--typically in the cementing or casing of the gas well that is a distinct, different stage from hydraulic fracturing of the gas well. These drilling stage mistakes can cause methane to contaminate water wells that did not have high or dangerous levels of methane prior to gas drilling. Denying this fact is false and misleads the public.
In Dimock, Pennsylvania and some other places, mistakes in gas drilling did cause methane to migrate to water wells. Actions were taken to repair gas wells and compensate homeowners of 18 water wells, where testing confirmed gas drilling caused the methane contamination of the water wells. Now to be clear, it was methane that contaminated water wells due to gas drilling mistakes and not fracking fluids or chemicals. No fracking fluids or chemicals came back from depth to contaminate any water well in Dimock.
I will be eager to see how FrackNation portrays the real issue of gas migration due to gas drilling mistakes. More to come once I see the movie.