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Sci Total Environ

Title:		Volatile organic compounds (VOCs) in indoor air and tap water samples in residences of pregnant women living in an area of unconventional natural gas operations: Findings from the EXPERIVA study
Author(s):		Caron-Beaudoin E; Whyte KP; Bouchard MF; Chevrier J; Haddad S; Copes R; Frohlich KL; Dokkie D; Tribal A; Juul S; Bouchard M; Verner MA;
Address:		"Department of Health and Society, Department of Physical and Environmental Sciences, University of Toronto Scarborough, Ontario, Canada; Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Centre for Clinical Epidemiology and Evaluation, University of British Columbia, British Columbia, Canada. Electronic address: elyse.caronbeaudoin@utoronto.ca. School for Environment and Sustainability, University of Michigan, MI, USA. Department of Occupational and Environmental Health, School of Public Health, Universite de Montreal, Quebec, Canada; CHU Sainte-Justine Hospital Research Center, Montreal, Quebec, Canada. Department of Epidemiology, Biostatistics and Occupational Health, McGill University Faculty of Medicine, Quebec, Canada. Department of Occupational and Environmental Health, School of Public Health, Universite de Montreal, Quebec, Canada; Centre de Recherche en Sante Publique, Universite de Montreal and CIUSSS Du Centre-Sud-de-l'ile-de-Montreal, Montreal, Quebec, Canada. Dalla Lana School of Public Health, University of Toronto, Ontario, Canada. Department of Preventive and Social Medicine, School of Public Health, Universite de Montreal, Quebec, Canada. West Moberly First Nations, British Columbia, Canada. Treaty 8 Tribal Association, British Columbia, Canada. Cumming School of Medicine, Community Health Sciences, University of Calgary, Alberta, Canada"
Journal Title:		Sci Total Environ
Year:		2022
Volume:		20210914
Issue:
Page Number:		150242 -
DOI:		10.1016/j.scitotenv.2021.150242
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"BACKGROUND: Northeastern British Columbia (Canada) is an area of unconventional natural gas (UNG) exploitation by hydraulic fracturing, which can release several contaminants, including volatile organic compounds (VOCs). To evaluate gestational exposure to contaminants in this region, we undertook the Exposures in the Peace River Valley (EXPERIVA) study. OBJECTIVES: We aimed to: 1) measure VOCs in residential indoor air and tap water from EXPERIVA participants; 2) compare concentrations with those in the general population and explore differences related to sociodemographic and housing characteristics; and 3) determine associations between VOC concentrations and density/proximity to UNG wells. METHODS: Eighty-five pregnant women participated. Passive air samplers were analyzed for 47 VOCs, and tap water samples were analyzed for 44 VOCs. VOC concentrations were compared with those from the Canadian Health Measure Survey (CHMS). We assessed the association between different metrics of well density/proximity and indoor air and tap water VOC concentrations using multiple linear regression. RESULTS: 40 VOCs were detected in >50% of air samples, whereas only 4 VOCs were detected in >50% of water samples. We observed indoor air concentrations >95th percentile of CHMS in 10-60% of samples for several compounds (acetone, 2-methyl-2-propanol, chloroform, 1,4-dioxane, hexanal, m/p-xylene, o-xylene, styrene, decamethylcyclopentasiloxane, dodecane and decanal). Indoor air levels of chloroform and tap water levels of total trihalomethanes were higher in Indigenous participants compared to non-Indigenous participants. Indoor air levels of chloroform and acetone, and tap water levels of total trihalomethanes were positively associated with UNG wells density/proximity metrics. Indoor air BTEX (benzene, toluene, ethylbenzene, xylenes) levels were positively correlated with some well density/proximity metrics. CONCLUSION: Our results suggest higher exposure to certain VOCs in pregnant women living in an area of intense unconventional natural gas exploitation compared with the general Canadian population, and that well density/proximity is associated with increased exposure to certain VOCs"
Keywords:		"*Air Pollutants/analysis *Air Pollution, Indoor/analysis British Columbia Environmental Monitoring Female Housing Humans Natural Gas Pregnancy Pregnant Women *Volatile Organic Compounds/analysis Water Gestational exposure Hydraulic fracturing Indoor air T;"
Notes:		"MedlineCaron-Beaudoin, Elyse Whyte, Kyle Powys Bouchard, Maryse F Chevrier, Jonathan Haddad, Sami Copes, Ray Frohlich, Katherine L Dokkie, Dean Juul, Sonje Bouchard, Michele Verner, Marc-Andre eng Netherlands 2021/11/26 Sci Total Environ. 2022 Jan 20; 805:150242. doi: 10.1016/j.scitotenv.2021.150242. Epub 2021 Sep 14"