Puralytics is a startup company founded in 2007 that develops light-activated nanotechnology for water purification. Their technology uses LEDs or sunlight to excite a nanotechnology-coated mesh, which then kills pathogens, destroys chemicals, adsorbs heavy metals, and purifies water through 5 light-activated processes. Their products include the Shield 500 water purification system, SolarBag personal water purifier, and LilyPad system for treating stormwater runoff. Studies show the LilyPad is effective at reducing various contaminants like pharmaceuticals, pesticides, and petrochemicals in stormwater through natural sunlight.