The findings of a new study in the journal Groundwater suggest
that methane concentrations in Susquehanna County water wells in
Pennsylvania can be explained without the migration of Marcellus
shale gas due to hydraulic fracturing.
"Testing of 1,701 water wells in northeastern Pennsylvania shows
that methane is ubiquitous in groundwater, with higher
concentrations observed in valleys vs. upland areas and in
association with calcium/sodium/bicarbonate, and sodium chloride
rich waters," the article states.
The article goes on to say that "on a regional scale, methane
concentrations are best correlated to topographic and hydrogeologic
features, rather than shale-gas extraction." The study authors are
from the Houston, Texas-based GSI Environmental Inc. and Cabot Oil
and Gas Corp. of Pittsburgh, Pennsylvania.
The study's assessment of isotopic and molecular analyses of
hydrocarbon gases in Dimrock Township suggests that gases present in
local water wells are most consistent with Middle and Upper Devonian
gases sampled in the annular spaces of local gas wells, as opposed
to Marcellus production gases.
About National Ground Water Association
NGWA, a nonprofit organization composed of U.S. and international
groundwater professionals -- contractors, equipment manufacturers,
suppliers, scientists, and engineers -- is dedicated to advancing
groundwater knowledge. NGWA's vision is to be the leading
groundwater association that advocates the responsible development,
management, and use of water.