Respect the Tolerance ZoneDig Safely Home< BackNext >


The tolerance zone protects you and buried utilities.
The tolerance zone spans the width of a marked utility line plus a specified tolerance distance from each indicated outside edge – 24 inches in New York and 18 inches in Massachusetts and Rhode Island. Digging with care in this zone helps protect you from utility line contacts – and helps protect utility lines from damage.

Use only hand tools in the tolerance zone.
For your safety, do NOT use mechanical excavation equipment within the tolerance zone. Use only hand tools or vacuum equipment.


To avoid damaging buried utilities, do not power dig within the tolerance zone. Hand dig or use vacuum equipment instead.