They aren't the only ones studying this; are you aware of anything that contradicts their results? From studies to simple observations that things stopped getting worse when the well was capped?

(I for one an extremely tired of this sort of attack, which among other things implies that government funded researchers are a pure as the driven snow. OK, I exaggerate, but it's been well demonstrated in many fields that deviating from the scientific establishment's orthodoxy results in your no longer being able to get government funding for your research.)