TTHMs and Bacteriological Water Quality in Desalinated Seawater: Experience and On-going Research in the US Virgin Islands
Islands and coastal regions throughout the world are turning increasingly to desalination of seawater for supply. For example, Tampa, FL has a plant just entering production and San Diego, CA and Texas others under consideration. While much of this desalination relies on membrane processes, sites where electrical power is steam-generated are uniquely suited to distillation processes. The US Virgin Islands has relied for desalination for much or most of their water needs for about 50 years. In the past 5 years total trihalomethanes approached MCL levels on one of the islands and the Water and Power Authority of the USVI (WAPA) initiated studies to address the problem, elucidate the sources and causes and reduce concentrations of these compounds in the distribution system.