{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["110(28)"],"submitter":["Jackson RB"],"pubmed_abstract":["Horizontal drilling and hydraulic fracturing are transforming energy production, but their potential environmental effects remain controversial. We analyzed 141 drinking water wells across the Appalachian Plateaus physiographic province of northeastern Pennsylvania, examining natural gas concentrations and isotopic signatures with proximity to shale gas wells. Methane was detected in 82% of drinking water samples, with average concentrations six times higher for homes <1 km from natural gas wells (P = 0.0006). Ethane was 23 times higher in homes <1 km from gas wells (P = 0.0013); propane was detected in 10 water wells, all within approximately 1 km distance (P = 0.01). Of three factors previously proposed to influence gas concentrations in shallow groundwater (distances to gas wells, valle"],"journal":["Proceedings of the National Academy of Sciences of the United States of America"],"pagination":["11250-5"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC3710833"],"repository":["biostudies-literature"],"pubmed_title":["Increased stray gas abundance in a subset of drinking water wells near Marcellus shale gas extraction."],"pmcid":["PMC3710833"],"pubmed_authors":["Karr JD","Warner NR","Darrah TH","Vengosh A","Poreda RJ","Osborn SG","Zhao K","Jackson RB","Down A"],"additional_accession":[]},"is_claimable":false,"name":"Increased stray gas abundance in a subset of drinking water wells near Marcellus shale gas extraction.","description":"Horizontal drilling and hydraulic fracturing are transforming energy production, but their potential environmental effects remain controversial. We analyzed 141 drinking water wells across the Appalachian Plateaus physiographic province of northeastern Pennsylvania, examining natural gas concentrations and isotopic signatures with proximity to shale gas wells. Methane was detected in 82% of drinking water samples, with average concentrations six times higher for homes <1 km from natural gas wells (P = 0.0006). Ethane was 23 times higher in homes <1 km from gas wells (P = 0.0013); propane was detected in 10 water wells, all within approximately 1 km distance (P = 0.01). Of three factors previously proposed to influence gas concentrations in shallow groundwater (distances to gas wells, valle","dates":{"release":"2013-01-01T00:00:00Z","publication":"2013 Jul","modification":"2026-05-05T16:37:56.658Z","creation":"2026-04-07T21:52:59.127Z"},"accession":"S-EPMC3710833","cross_references":{"pubmed":["23798404"],"doi":["10.1073/pnas.1221635110"]}}