Abstract
Recent large-scale drinking water chemical contamination incidents in Canada and the U.S. have affected more than 1 000 000 people and involved disparate premise plumbing decontamination approaches.
Highlights
In January 2014, coal washing pollutants contaminated the water supply for 300 000 residents in West Virginia, USA, affecting 15% of the state's population
In Glendive, Montana hot water flushing was recommended and flushing duration was longer as compared to guidance issued in West Virginia and Washington, D.C
This study was initiated because premise plumbing flushing caused illness following the January 2014 drinking water contamination incident in West Virginia and flushing procedures applied at subsequent organic contaminant incidents in Canada and the U.S varied
Summary
In January 2014, coal washing pollutants contaminated the water supply for 300 000 residents in West Virginia, USA, affecting 15% of the state's population. The State of West Virginia issued a different set of flushing procedures for premise plumbing systems that discharged to septic tanks.3 Both protocols recommended flushing contaminated hot water first, and neither were pilot tested. In Glendive, Montana hot water flushing was recommended and flushing duration was longer as compared to guidance issued in West Virginia and Washington, D.C. indoor air monitoring in Montana revealed elevated volatile organic contaminant (VOC) levels when faucets were flowing.. This study was initiated because premise plumbing flushing caused illness following the January 2014 drinking water contamination incident in West Virginia and flushing procedures applied at subsequent organic contaminant incidents in Canada and the U.S varied. Organic chemical contamination incidents were the sole focus of this study
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