Dual filters and coagulant aids were equivalent to microfiltration in pilot studies

摘要

After a risk assessment of municipal water supplies, the US Environmental Protection Agency (EPA) determined that New York City (NYC) was at risk and that a water filtration plant had to be built. This assessment was the outcome of regulations announced by EPA June 29,1989, generally referred to as the Surface Water Treatment Rule (SWRT). These regulations specify criteria for determining filtration as a water treatment technique for public water systems.