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Environmental Data

Promotion of measures to cope with global warming

Item Unit FY2022 FY2023
CO2 emission intensity*1 Pre-adjustment kg-CO2/kWh 0.549 0.533
Adjusted 0.533 0.535
CO2 emissions*1 Pre-adjustment x106 t-CO2 12.1 12.5
Adjusted 11.8 12.5
Equipment utilization rate of the Tomari nuclear power station % 0 0
Power generation efficiency of thermal power stations % 41.4 40.9
Electric power transmission and distribution loss % 6.1 5.5
Purchase of electric power from renewable energy, etc. Biomass power generation, etc.*2 x106 kWh 945 1,062
Wind power generation x106 kWh 1,179 1,219
Solar power generation x106 kWh 2,942 3,060
Geothermal power generation x106 kWh 1 1
CO2 emissions in our office buildings, etc. (HEPCO Group)*3 *4 x103 t-CO2 29 27
Electricity usage in our office buildings (HEPCO Group) x106 kWh 57.9 55.0
Electricity usage in our office buildings x106 kWh 42.5 40.6
Amount of fuel consumed by heaters, etc. (converted to crude oil) kl 305 169
Amount of fuel consumed by company vehicles kl 1,077 1,015
Number of electric vehicles in company vehicles number (total) 10 37
SF6 gas recovery rate
(HEPCO Group)
(Calendar year value)
Upon inspection % 99 99
Upon removal % 99 99

"HEPCO Group" is written in items including group companies.

  1. *1Calculated based on the "GHG Emissions Accounting, Reporting, and Disclosure System" of the "Act on Promotion of Global Warming Countermeasures".
  2. *2Power generation from plastic waste is included.
  3. *3Excludes the electricity when supplying the electricity, such as distribution losses, etc.
  4. *4Obtained by converting electricity of the office, water, heating fuel, and vehicle fuel consumption to CO2 based on "GHG Emissions Accounting, Reporting, and Disclosure System" of the "Act on Promotion of Global Warming Countermeasures".

Promotion of regional environmental conservation

Item Unit FY2022 FY2023
SOX emission intensity (Average of all power sources, HEPCO Group) g/kWh 0.55 0.65
NOX emission intensity (Average of all power sources, HEPCO Group) g/kWh 0.46 0.45
SOX emission intensity (Average of thermal power source) g/kWh 0.51 0.62
NOX emission intensity (Average of thermal power source) g/kWh 0.50 0.51
The pillar transformers contaminated by trace amounts of PCB*5 Treatment weight t 392 477
Number of transformers number 2,560 2,829
Water usage in power stations*6 x103 m3 4,568 4,507
Amount of wastewater from power stations*7 x103 m3 2,667 2,632

"HEPCO Group" is written in items including group companies.

  1. *5The treatment of pillar transformers and insulating oil contaminated by trace amounts of PCB started from FY2012.
  2. *6Aggregates the amount of water usage in thermal power stations, etc. excluding condenser cooling water and drinking water.
  3. *7Aggregates the amount of water discharged from the wastewater treatment system in thermal power and nuclear power stations.

Promotion of a recycling-based society

Item Unit FY2022 FY2023
Recycling rate of industrial waste (HEPCO Group)*8 % 90.8 88.4
Industrial waste Emissions x103 t 857 736
Recycled x103 t 778 650
Recycling rate of industrial waste Coal ash % 89.1 86.5
Desulfurized gypsum % 100 99.9
Concrete pillars % 100 100
Scrap wire % 100 100
Plastics for electricity distribution % 100 100
Water usage in office buildings (HEPCO Group) x103 m3 205 201
Water usage in office buildings x103 m3 152 150
Green procurement rate (Office supplies, etc., HEPCO Group)*9 % 94.8 95.1
Copy paper purchased (HEPCO Group) x106 sheets 76 75

"HEPCO Group" is written in items including group companies.

  1. *8The coverage is industrial waste generated in the power supply business of Hepco and group companies.
  2. *9Shows the procurement rate of environment-friendly products such as copy paper, printed matter, OA equipment, and clothing.

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