Validation of Drinking Water Disinfection By-product Exposure Assessment for Rural Areas in the National Children's Study

Document Type

Article

Publication Date

5-2015

Keywords

Disinfection, Drinking Water, Environmental Exposure, Humans, Pilot Projects, Reproducibility of Results, Rural Population, Trihalomethanes, United States, Water Pollutants, Chemical, Water Quality

Abstract

The objective of this study was to provide evidence to evaluate the proposed National Children's Study (NCS) protocol for household water sampling in rural study areas. Day-to-day variability in total trihalomethane (TTHM) concentrations in community water supplies (CWS) in rural areas was determined, and the correlation between TTHM concentrations from household taps and CWS monitoring reports was evaluated. Daily water samples were collected from 7 households serviced by 7 different CWS for 15 days. Coefficients of variation for TTHM concentration over 15 days ranged from 8% to 20% depending on the household. Correlations were tested between TTHM household concentrations and the closest date- and location-matched CWS monitoring reports for the 15-day mean (R=0.85, P50 μg/l corresponded to measured NCS household concentrations ranging from 2 to 60 μg/l. TTHM concentrations were higher in CWS than NCS samples (11.2±3.2 μg/l, mean difference±SE, P

Publication Title

Journal of Exposure Science and Environmental Epidemiology

Volume

25

Issue

3

First Page

303

Last Page

307

DOI of Published Version

10.1038/jes.2014.51

PMID

25027449

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