[ZGuy]

They may have lumped black water and gray water together, or they may think that any water other than rainwater or treated water from the hose will have impurities that will build up and contaminate the soil over time. I guess they figure they must stop me from my desire to contaminate my own garden. [sigh]

[Sunshine Sister]

I sympathize with the "sigh." Like you are going to poison yourself. Come on!