Septic Rules by State
Septic regulations aren't national — they're state, and often county. Pick your state to see who issues permits, whether a sale triggers an inspection, whether an aerobic system needs a maintenance contract, the key setback distances, and notable bans. Twelve states so far; more added over time.
Before you act on this
Septic rules vary by state — and often by county or town, which can set stricter requirements than the state minimums shown here. This tool summarizes statewide rules as published by state agencies in September 2026; rules change, and local health departments are the final authority. Always confirm with your local permitting authority before buying, building, or modifying a system.
State not listed yet? The rules above still show you which questions to ask your county health department: who permits, what a sale triggers, whether your system type needs a service contract, and the setback distances that apply to your lot.