It was felt that arsenic contamination in the groundwater was due to natural causes. The government is trying to provide an alternative drinking water source and a method through which the arsenic content from water can be removed. Pipes, fittings, solder, and the service connections of some household plumbing systems contain lead that contaminates the drinking water source. Recreational use of water . Untreated sewage, industrial effluents, and agricultural waste are often discharged into the water bodies such as the lakes, coastal areas and rivers endangering their use for recreational purposes such as swimming and canoeing.
Petrochemicals contaminate the groundwater from underground petroleum storage tanks.
Other heavy metals . These contaminants come from mining waste and tailings, landfills, or hazardous waste dumps. Chlorinated solvents . Metal and plastic effluents, fabric cleaning, electronic and aircraft manufacturing are often discharged and contaminate groundwater. Poliomyelitis Protozoal infections Amoebic dysentery Water-borne diseases are infectious diseases spread primarily through contaminated water.