EPA do-not-flush list
EPA homeowner guidance warns against items such as wipes, dental floss, feminine hygiene products, condoms, diapers, cotton swabs, cigarette butts, coffee grounds, cat litter, paper towels, paint, pesticides, and hazardous chemicals.
Kitchen habits matter
Keep cooking grease and excessive food solids out of the drain. A garbage disposal can increase solids loading and may increase maintenance needs.
What to verify locally
Permitting, inspection, setbacks, acceptable system types, professional licensing, and design requirements are controlled by state and local authorities. If your question affects construction, a property purchase, a repair, or drinking-water safety, confirm the answer with the local health/environmental department.
Primary reference
U.S. EPA — Frequent Questions on Septic Systems ↗
U.S. EPA — How to Care for Your Septic System ↗
Reviewed August 26, 2026.