Many harmful chemicals are used widely in local business and industry. These can become drinking water pollutants. The most common sources of such problems are:
these include nearby factories, industrial plants and even small businesses such as gas stations and dry cleaners. All handle a variety of hazardous chemicals that need careful management. Spills and improper disposal of these chemicals and industrial wastes threaten ground water supplies.
Leaking underground tanks and piping:
petroleum products, chemicals and wastes stored in underground storage tanks and pipes may end up in ground water. Tanks and piping leak if they are not constructed or installed properly. Steel tanks and piping corrode with age.
Landfills and waste dumps:
modern landfills are designed to contain any leaking liquids. However, floods can carry them over the barriers. Older dumpsites have a wide variety of pollutants that can seep into ground water.