Study Session 4 Water Pollution

Pollutant
Likely sources
Sediment	Construction, road surfaces, emissions from vehicles, industrial sources, vehicle wear
Copper	Vehicle brake pads, industrial activities, plumbing and guttering
Lead	Industrial activities and residues from historical activities (plumbing, paint, leaded petrol, sprays), tyre-balancing weights, vehicle brake pads
Zinc	Vehicle tyres, galvanised building materials, paint, industrial activities
Hydrocarbons	Vehicle emissions, lubricating oils
Rubber	Tyre wear
Detergents	Wash-down areas, domestic discharges (e.g. from car washing), industrial discharges
Litter	Discarded material (e.g. plastic bags, cups, cigarette ends), windblown materials, illegal dumping