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Environmental Data

Promotion of measures to cope with global warming

Item Unit FY2017 FY2018
CO2 emission intensity*1 Actual emission intensity kg-CO2/kWh 0.632 0.666
Adjusted emission intensity 0.640 0.678
CO2 emissions*1 Actual emissions x106 t-CO2 16.9 16.4
Adjusted emissions 17.1 16.7
Equipment utilization rate of the Tomari nuclear power station % 0 0
Power generation efficiency of thermal power stations % 39.7 39.5
Electric power transmission and distribution loss % 5.6 5.1
Purchase of electric power from renewable energy, etc. Biomass power generation, etc.*2 x106 kWh 528 364
Wind power generation x106 kWh 747 833
Solar power generation x106 kWh 1,203 1,520
CO2 emissions in our office buildings, etc. (HEPCO Group)*3 *4 x103 t-CO2 32 32
Electricity usage in our office buildings (HEPCO Group) x106 kWh 60.2 59.8
Electricity usage in our office buildings x106 kWh 44.3 44.6
Amount of fuel consumed by heaters, etc. (converted to crude oil) kl 109 109
Amount of fuel consumed by company vehicles kl 1,412 1,363
Fuel economy of company vehicles, etc. (excluding special vehicles) km/l 9.2 9.1
Rate of low-emission vehicles in company vehicles. % 81.7 81.7
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. *1 Calculated based on the "GHG Emissions Accounting, Reporting, and Disclosure System" of the "Act on Promotion of Global Warming Countermeasures".
  2. *2 Power generation from plastic waste is included.
  3. *3 Excludes the electricity when supplying the electricity, such as distribution losses, etc.
  4. *4 Obtained 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 FY2017 FY2018
SOX emission intensity (Average of all power sources, HEPCO Group) g/kWh 0.97 0.89
NOX emission intensity (Average of all power sources, HEPCO Group) g/kWh 0.60 0.65
SOX emission intensity (Average of thermal power source) g/kWh 0.94 0.87
NOX emission intensity (Average of thermal power source) g/kWh 0.67 0.72
The pillar transformers contaminated by trace amounts of PCB*5 Treatment weight t 603.0 609.1
Number of transformers number 4,800 4,800
Insulating oil contaminated by trace amounts of PCB*5 Treatment weight t 460.4 447.8
Number of drums number 2,800 2,800
Water usage in power stations*6 x103 m3 4,858 4,732
Amount of wastewater from power stations*7 x103 m3 2,756 2,824

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

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

Promotion of a recycling-oriented society

Item Unit FY2017 FY2018
Recycling rate of industrial waste (HEPCO Group)*8 % 97.7 96.8
Industrial waste Emissions x103 t 1,116 1,146
Recycled x103 t 1,090 1,109
Recycling rate of industrial waste Coal ash % 98.3 97.1
Desulfurized gypsum % 100 100
Concrete pillars % 100 100
Scrap wire % 100 100
Plastics for electricity distribution % 100 100
Water usage in office buildings (HEPCO Group) x103 m3 241 237
Water usage in office buildings x103 m3 184 179
Green procurement rate (Office supplies, etc., HEPCO Group)*9 % 86.7 96.8
Copy paper purchased (HEPCO Group) x106 sheets 116 115

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

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

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