Gas System Modernization Program

PSE&G is hard at work modernizing its natural gas distribution system, improving safety and reliability while reducing the greenhouse gas emissions that exacerbate climate change.

PSE&G launched the second phase of the Gas System Modernization Program (GSMP II) in January 2019. GSMP II represents a nearly $1.9 billion investment that will create roughly 3,200 jobs and will replace more than 875 miles of pipes along with other gas infrastructure improvements across the state.

PSE&G, Google Earth Outreach and the Environmental Defense Fund joined forces to demonstrate faster, better ways to map and measure methane leaks coming from underground pipes. The technology helped PSE&G prioritize which pipes were replaced first during the first phase of GSMP.

Nationwide, our infrastructure is growing older. As one of the oldest states in the nation, New Jersey’s infrastructure is bound to be among the oldest, too. PSE&G’s natural gas network has more than 3,000 miles of cast-iron and unprotected steel main – more than any other utility in the nation – and much of it is more than a century old.

As part of GSMP, PSE&G began replacing these aging lines with new, more durable plastic in 2015. At the end of the three-year first phase of the program, the company replaced 450 miles of pipes throughout New Jersey. As of September 2022, more than 1,000 additional miles have been replaced.

When Tropical Depression Ida caused widespread flooding, in September 2021, thousands of customers maintained their gas or were restored more quickly due to GSMP, which included upgrades to high-pressure mains that reduced the likelihood of water infiltration into the system.

The modern equipment that makes it easier for us to shut off gas and prevent emergencies also prevents methane from being released into the atmosphere. In fact, when the current phase of GSMP is completed by 2023, we expect to achieve an approximate 22% reduction in methane emissions compared to 2018 levels.

The positive impacts of this critical infrastructure work are widespread. These upgrades will make New Jersey’s natural gas system safer, more reliable and will help reduce a significant source of methane emissions, which is good for clean air and for the climate.