They also leak toxins that contaminate water and can harm marine life.

They also leak -that contaminate water and can harm marine life.

Floods can also contaminate water sources, causing diseases like cholera.

Coal ash can contaminate water and harm fish and wildlife.

Environmental groups say fracking can contaminate water supplies.

Environmentalists say that fracking can contaminate water supplies.

Coal ash can contaminate water.

The disease can contaminate water storage and is spread by breathing in affected water particles, for instance steam or vapor.

An increasing number of reports by the media and state regulators indicate that fracking, if poorly done, can contaminate water supplies.

Defecating in the open can contaminate water supplies and spread diseases such as diarrhoea, which kill many thousands of people every year.

Defecating in the open can contaminate water supplies and spread diseases such as diarrhea, which kill many thousands of people every year.

It is claimed one entailed Iraqi diplomats planning to contaminate water supplies to Jordanian and US troops on the desert border with Iraq.

It has been the target of intense protests by those concerned that a spill could contaminate water supplies underneath Native American tribal lands.

Weil's disease is a potentially fatal infection carried in the urine of rats which can contaminate water or other places frequented by rodents.

It can be disseminated in a spray or vapour when used as a chemical weapon, or used to contaminate water, food, and agricultural products.

Rain water that runs off roads and other hard surfaces into sewer systems can contaminate water supplies, cause beach closings and harm aquatic life.