Sanitation facility

Septic tank placement rules

United States · Auxiliary · usually permanent

EPA sets no national septic setbacks — your local health department permits the system; widely used minimums are 50 ft from the tank to a well and 100 ft from the drainfield to a well.

Use in planner All objects

Placement rules

One of the most important objects in a site plan: it affects the house, well, boundary and service access.

Boundary setback

Setbacks from plot boundaries and neighbouring buildings.

Setback to property line Set by local/state permit — check health dept US EPA — Frequent Questions on Septic Systems

Sanitary zone

Sanitary protection distances to wells, drinking water and dwellings.

Septic tank distances

Septic tank to well ≥50 ft (Title 5 / state) Water Well Clearance Distances (Mass Title 5 & EPA reference table)

Drainfield to well ≥100 ft typical (Title 5) Water Well Clearance Distances (Mass Title 5 & EPA reference table)

Important limitation

The catalog is a planning aid, not a legal opinion. Before construction, check the land plot category, local land-use and development rules, easements, utility protection zones and neighbour buildings.