Top turbidity a measure of water cloudiness. Cloudiness is caused by suspended solids which scatter and absorb light rays. Top urban runoff surface water runoff from urban areas such as lawns, streets, parking lots and residential developments. Such runoff can pick up, transport, and deposit a variety of pollutants including oil, gasoline, pesticide and heavy metals. Top volatization loss of a substance through evaporation or sublimation.
Top waste stream the waste output of any area.
Top yard trimmings the component of solid waste composed of grass clippings, leaves, twigs, branches, and garden refuse.