Everpure. The ViruPure commercial-grade residential point-of-use water filtration system filters out 99% of bacteria, viruses, and cysts down to 0.019 micron, as well as reducing VOCs, THMs, MTBEs, chlorine, chloramines, and lead. The system, which mounts under the sink, has a 500-gallon capacity, which lasts a family of four about a year. 800.323.7873. www.everpure.com.