Well, I sent an email to Rubbermaid:
On your website, in the description for the 32-gallon Brute container, it states "All colors are NSF/USDA Approved for food contact and NSF tested/certified."
But, we have heard that only the white, gray, and yellow containers are foodsafe. We are using a green 32-gallon Brute for storing/mixing our synthetic saltwater for our reef tank, and have been told by other reef keepers that the green is definitely not foodsafe. PLEASE let us know, whether safe or not!
and they replied:
I looked into your question and it looks like you are correct.
Gray, White and Yellow are USDA Meat & Poultry Equipment Group Listed and assist in complying with HACCP guidelines.
Certified to NSF Standard #2 (gray, white and yellow) and Standard #21 (gray, white, yellow, blue, red and black).
We will have to look at our web site and see if we have to make those changes.
So, green is out (at least for Brute containers and reef tanks)!