Are your products safe for grey water systems? Sydney January 11, 2019 17:25 Updated Follow Yes, our products are safe for grey water systems. Happy Washing! Related articles Are your products safe for septic tanks? Are your products vegan? Are any Dropps products approved by the EPA's Safer Choice program? I have hard water. Can I use Dropps? Can your detergent pods be used on natural fibers like wool, silk, and cashmere? Comments 0 comments Article is closed for comments.