Minnesota drinking water is contaminated with nitrates from agricultural fertilizer. http://www.startribune.com/local/184570171.html?refer=y Chemical fertilizers also harm wildlife throughout our waterways by boosting oxygen removing algae growth in lakes, rivers, ponds, streams and even the ocean near mouths of rivers. Check out the Gulf Coast Deadzone. Note: your phosphate filled laundry and other soaps don't help. Use less or find alternatives.