... found in homes and other indoor environments due to the widespread past uses of lead in gasoline, paint, plumbing and building products and other consumer goods. Indoor lead sources include ... sources include lead in dust, lead-based paint and lead in plumbing, in Canada and the United States. In Mexico, a major source of indoor lead is home-based pottery operations using lead-based glaze. ... presence of pathogens and chemical contaminants in drinking water can result in a wide range of health effects for children, from gastrointestinal discomfort to death. The indicators in this section...