Is Seventh Generation Bathroom Tissue safe for septic systems? March 13, 2019 19:17 Updated Yes, Seventh Generation Bathroom Tissue is safe for septic systems. Related articles What does “biodegradable formula” mean to Seventh Generation? Are the laundry detergents safe for greywater and septic systems? Do Seventh Generation Automatic Dishwashing products contain phosphates? Where are your products manufactured? Does Chlorine Free Bleach disinfect?