Toledo, Ohio residents can't drink the water

In my new novel, As All My Fathers Were, I bring up the unintended consequences of farmers fertilizing their fields without regard to where the fertilizer ends up. In Ohio it ended up in Lake Erie causing an algae bloom that poisoned the Toledo drinking water.

What is the difference between the release of fertilizer from fields into our waterways causing poison to humans and the discharge of oil or chemicals into lakes, rivers or on the tundra? Officials in Toledo say the nitrogen released into the water makes algae bloom and that the size of the bloom has grown yearly. Not only in Ohio but all over the US, there are algae blooms that poison our drinking water. 

The key question is, how do we farm so the fertilizer stays on the farm and does not go bubbling off into our drinking water or into the big rivers and into the "dead zone" where the Mississippi dumps its caustic load into the Gulf of Mexico.

If holding ponds can be required for mines to contain tailings, can not earth dams be constructed to hold the fertilized water drifting off fields? It is time we required farmers to contain the poisons they spread on their fields to their fields, and not let them run wild through the country's waterways.