Borax Laundry Detergent Safety for Cleaning and Laundry

I live in a modern apt. complex which collects used water in a grey water system on our gardens. They're particular about not using poisons. I get that. I used to use borax for dish cleaning chores but stopped when I moved in due to "rules". I researched online and it said not good for grey water. However, I will use occasionally in bath soak. Can my landlord detect borox in my water?

Another use of borax:

I have been sprinkling the borax powder on the blanket my dog sleeps on. The borax will kill the mites. I wash it once a week. I also use the borax, peroxide bath.