Curious how commercial grows manage run off?

[EastCoastGambit]

I love MJ as much as anyone but am sort of curious on the amount of nutrient that potentially gets sent back to nature in a harmful fashion? Are large registered grows obligated to deal with their runoff in an environmentally friendly way.

I typically take my extra water and use it to water ornamental plants in my yard.

How do you all handle your runoff water? Sending it down the drain would be bad and wasteful, right?

 

[Nifty_PoT]

I am not sure about cannabis but in the food industry you have to catch the runoff and dilute it to acceptable levels before disposing it . Makes good garden feed .