 Blocked drains, if left long enough, can be a high safety concern as the presence of Mold and bacteria increases.On December 17, 2007 the Virginia Graeme Baker Pool And Spa Safety Act (P&SS Act) was passed into law in the United States by George W. Bush.Effective on December 19, 2008, this law seeks to bring an end to suction entrapment related injuries and deaths by incorporating consumer protection regulation to pool and spa drains.