• Clean Water Act (CWA) | Agriculture | US EPA
  The objective of the Federal Water Pollution Control Act, commonly referred to as the Clean Water Act (CWA), is to restore and maintain the chemical, physical, and biological integrity of the nation's waters by preventing point and nonpoint pollution sources, providing assistance to publicly owned treatment works for the improvement of  wastewater treatment, and maintaining the integrity of wetlands.  
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• Priority Pollutants List
  Priority Pollutants list
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• TOXIC METALS
  Toxic drinking water.  This is the most important source of toxic metals for most people.  Aluminum, copper, toxic chlorides and fluorides are added to many municipal water supplies.  Aluminum allows dirt to settle out of the water, while copper kills algae that grows in reservoirs.  Chlorine is used to disinfect water, although ozone works very well and is a far more healthful treatment.  Wells and even municipal water may also contain some lead, arsenic and other undesirable metals.  Galvanized and black plastic pipes can be an important source of cadmium.  Lead-soldered pipes and copper pipes may increase these metals in the drinking water if the water is soft.  It is an uncommon problem in hard water areas.
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• Arkansas Act 402 of 2013
  Act 402 of 2013
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• Toxic Minerals to Avoid in Food and Environment
  For Dummies
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