Information obtained by a local environmental activist is raising questions about the safety of natural gas drilling.

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CHAUTAUQUA COUNTY -- Walter Hang, of Toxics Targeting, used the Freedom of Information Act to obtain more than 140 complaints filed with the Chautauqua County Health Department by residents living near drilling rigs. The complaints, filed over a 25 year period, correspond with the time when gas drilling started in Western New York.

VARICK -- An environmental activist says he's uncovered the "first documented case" of groundwater pollution caused by a controversial natural gas drilling practice.

Walter Hang of Toxics Targeting says the drinking water supply to a home in the Seneca County town of Varick was "contaminated" after the Chesapeake Energy Company used hydraulic fracturing of "fracking" to drill for natural gas some 2,000 feet below ground.