Inspections and leaks in the gas network Percentage of total high and medium pressure network inspected (service obligation 100% in 3 years) 53.3% 56.3% 58.0% Percentage of total low pressure network inspected (service obligation 100% in 4 years) 68.9% 78.1% 74.7% Number of leaks on distribution network located upon inspection per kilometre of network 0.085 0.065 0.059 Number of leaks on distribution network located upon notification by third parties, per kilometre of network 0.043 0.041 0.037 264 In 2017, the percentage of the grid that was inspected was significantly higher than the minimum standard required by Arera (100% for the high and medium pressure grid in 3 years and 100% of the low pressure grid in 4 years).