As acomplement to conventional noise mitigation, addition of wanted sounds, in particular sounds from water structures, has been suggested as am ethod for improving noise-polluted acoustic environments. The effect of adding water sounds to road-trafficn oise wase xplored in al istening experiment with 31 listeners. Recordings of road-trafficnoise were combined with recordings of waters sounds of varying pleasantness, and the listeners assessed the sounds on eight adjective scales, representing the perceptual dimensions Pleasantness and Eventfulness.The results showed that overall pleasantness increased when ahighly pleasant water sound wasadded to the road-trafficnoise. Forless pleasant water sounds, no effect, or adecrease in pleasantness, wasfound. In addition, pleasant water sounds increased perceivedeventfulness.