Natural saltwater contains many unwanted organisms and pollutants.

Such runoff can contain sediments, fecal bacteria and other pollutants that enter the watershed and lead to problems within the ecosystem.

This water contains naphthenic acid, trace metals such as mercury and other pollutants.

Black water and gray water have different characteristics, but both contain pollutants and disease-causing agents that require monitoring.

This action in turn contains pollutants and controls the hydrology of the environment.

It is accepted now that drinking water in many areas contains certain pollutants which are undesirable.

The sands of the Aralkum and the dust which originates from it contain pollutants.

Fish caught for sport in rivers, lakes, ponds, and streams may also contain industrial pollutants that play havoc with a developing nervous system.

Such ceramic packaging consists of nothing but baked clay and does not, therefore, contain pollutants of any sort.

Those companies claim deeper seawater contains more nutrients and fewer pollutants than surface water.