Sources of drinking water and public beaches become polluted by overflowing sewage systems, runoff from roads, lawns, farms, and industrial sites. 

Toxic Chemicals

Perchlorate, a rocket fuel, has been found in tap water in many cities. Perchlorate is a carcinogen that is a serious threat to human health and our clean water resources. Arsenic has also been found in tap water. It may cause birth defects, cancer and reproductive problems.

Sewage

During heavy rains, sewage systems can overflow and re...