In nature, clams are detectors of pollutants; they serve as tiny filtration systems. Clams is a collection of kinetic sound sculptures which convert data from water quality sensors into sounds and movement. Each ‘clam’ is constructed from recycled waste plastic and contains a speaker. The continuously evolving microtonal soundscape gives each shell a subtle, life-like opening and closing action. Real-time readings from an industry-standard water purity sensor placed in the river, lake or sea of the cities where the artwork is presented, form the basis for the music, which is generated through a constantly shifting process based on water quality levels over time. Clams invite the audience to draw connections between media art, data sonification and environmental sustainability.