Trihalomethane Formation Potential in Rainwater Harvested from Different Roofing Materials
نویسندگان
چکیده
Rainwater harvesting systems are one way to address the worldwide increase in water demand. If the harvested rainwater is for indoor use, residential users often disinfect it. If it is disinfected with chlorine, the presence of dissolved organic carbon (DOC) can lead to the formation of harmful disinfection by-products such as trihalomethanes (THMs). Although the quality of harvested rainwater produced in individual residences is not regulated, it would be wise for a user to comply with United States Environmental Protection Agency drinking water standards; total THMs are regulated at 80 g/L in tap water. In this study, we examined THM formation in chlorinated rainwater harvested from a full-scale asphalt fiberglass shingle roof. Under disinfection conditions relevant for a residence, total THMs were formed at concentrations from
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