National Transmission System

Gas Transmission Operator GAZ-SYSTEM designated, by virtue of decision of the President of the ERO of 13 October 2010 as the operator of gas transmission system, controls the national transmission network and ensures the continuity and reliability of gas transportation between the sources and customers in Poland. In the decision of December 2018, the President of the Energy Regulatory Office designated GAZ-SYSTEM as the transmission system operator until 6 December 2068.

The transmission system consists of two interconnected systems:

• Transit Gas Pipeline System,
• National Transmission System,
  • comprising two natural gas sub-systems – for high-methane natural gas (grade E) and
  • for low-methane natural gas (grade Lw).

Transmission in numbers
Figures for calendar year 2024 – as at 31 December 2024

Length of transmission network	12 151 km
Number of entry points1	66
Number of exit points2	891
Number of gas stations	840
Number of compressor stations	14
Number of transmission system nodes	36
Volume of transmitted gas fuel3	16,9 bcm
	194,9 TWh
Volume of transmitted gas fuel including underground gas storage (UGS)4	19,7 bcm
	226,7 TWh
Underground gas storage working volume (UGS)	3,33 bcm

¹ Number of physical entry points to the transmission system, i.e. points with a specific physical location where gas is delivered to the system. Includes gas imports, withdrawal from UGS facilities, deliveries from fields and domestic production (mixing plants.
² Number of physical exit points from the transmission system, i.e. points with a specific physical location where gas is offtaken from the system. Includes transmission to exit points at the connection with distribution areas and the distribution network other than a gas distribution area, injection to UGS facilities, exports and supply to final customers.
³ The volume of transported gas comprises low-methane gas (Lw), after volume conversion to high-methane gas (E) equivalent. The volume of gas transmitted expressed in units of volume is an indicative value.
⁴ The volume of transported gas includes the operation of UGS facilities. The volume of transported gas comprises low-methane gas (Lw), after volume conversion to high-methane gas (E) equivalent. The volume of gas transmitted expressed in units of volume is an indicative value.