An Official Web Site for New Hampshire Government
Gas & Steam
Water & Sewer
Sustainable Energy Sustainable
Enter Search Request
General Information
skip nav 
Contact Information
Dig Safe
Underground Damage Prevention Overview
Dig Safe Rules
Dig Safe Laws
Enforcement Program
Overall NH Damage Prevention Statistics
811 Dig Safe
"Call before you dig"
Underground Damage Report Forms
Utilities By City/Town
Education and Training
Pipeline Safety
Pipeline Safety Overview
NH Pipeline Mileage Statistics
Authorities per NH State Law/Administrative Rules
Pipeline Safety Program Funding
Accelerated Cast Iron Bare Steel Replacement Programs
Pipeline Safety Incidents in New Hampshire
Regional and National Involvement
Pipeline Safety Rules
Education and Training
Electrical Safety and Reliability
Electrical Safety and Reliability Overview
Electric Franchise Map

  - Links Disclaimer

Pipeline Safety Overview

What We Inspect:

The Safety Division oversees more than 3,100 miles of intrastate pipelines delivering gas to more than 127,500 customers within 53 communities in New Hampshire.  Two natural gas utilities, two transmission operators, over 21 liquid propane gas operators, one propane-air distribution company, one master meter operator, and two methane operators are inspected at least once per biennium, although most are inspected annually.  The Division utilizes 30 natural gas inspection modules with many including customized versions of federal inspection forms to conduct rigorous inspections of operators using a risk based methodology.   

In 2017, New Hampshire expects to complete approximately 200 scheduled staff visits that include a sampling of nearly 1,915 miles of distribution mains feeding 1,212 miles of distribution services supplying approximately 127,500 metered customers.  In addition there are approximately 20 miles of intrastate transmission pipelines within New Hampshire. Areas served include 53 communities having a population base of approximately 800,000.  These figures do not include pipelines served by jurisdictional propane systems.

Click on map for more detail.

Franchise areas and gas pipelines operating at greater than 100 psig are shown on the map at left. These include interstate and intrastate pipeline operators, (distribution and transmission), regardless of state or federal jurisdiction.


The National Pipeline Mapping System has information for interstate gas & hazardous liquid pipelines regulated by the federal government. It is able to show detail down to the county level.