Many water quality problems exist because a substance that was unknown or seemed harmless decades ago now is recognized as a pollutant. In the 21st century, state legislators and regulators and nongovernmental entities have devised ways to prevent or mini
Many water quality problems exist because a substance that was unknown or seemed harmless decades ago now is recognized as a pollutant. In the 21st century, state legislators and regulators and nongovernmental entities have devised ways to prevent or mini