To effectively filter and treat all of the water going through a home, the whole house water filtration system needs to be installed at the earliest point possible, right where the water line from the city comes into the house. On city water, a filter can reduce chlorine, sediment, or even ultraviolet disinfection. If a city’s disinfection process fails or equipment doesn’t work properly or a catastrophic event like a flood occurs, a UV system in your home will provide protection. For homes using a well water supply, the filtration system goes right after the pressure tank to catch every drop of water going into the house. On well water, ultraviolet disinfection typically works best as the last thing in the system that includes a variety of filters. For safety and functionality purposes, you always need to make sure that a professional plumber, like Mike Counsil Plumbing, installs your water treatment system.