This should not come as a surprise as more and more chemicals being studied by researchers have been found to have potentially harmful effects on humans. For information from the EPA press release click here.
Some of the latest contaminants targeted for regulation are perchlorates, a chemical that is produced naturally and increased from man made interference, and can effect hormone levels in pregnant mothers. Studies have shown that perchlorates can interfere with the thyroid gland and this is the main reason it is being regulated.
The EPA has decided to address 15 others contaminants at the same time, they usually only tackle 1 chemical at a time, in an attempt to make it more cost effective to enact regulations for safer drinking water. While this is certainly a step closer to safer drinking water as a whole, we should not have to wait for federal water safety regulations to have safe drinking water.