Environmental indicators

Environmental indicators

This section includes indicators and GRI Standard disclosures.

Our environmental data covers our 11 largest manufacturing sites, representing more than 95% of the overall environmental impact of the Company.

The methodologies used to calculate data are detailed in internal Company procedures, which are regularly reviewed during third-party environmental audits (EMAS, ISO 14001, ISO 50001, ISO 14064).

See ST site certifications table in business indicators.

ST follows the Greenhouse Gas (GHG) Protocol for managing its GHG emissions. The resulting CO2 emissions are reported according to recognized international standards (Reference – World Resources Institute (2004) GHG Protocol – A Corporate Accounting and Reporting Standard).

Scope 1 – Direct emissions resulting from operations

  • Combustion emissions: World Resources Institute (2008) – GHG Protocol Calculation tool for stationary combustion v.4.1
  • PFC emissions: 2007 IPCC fourth Assessment Report Climate Change. Table 2.14. Lifetimes, radiative efficiencies and direct GWPs relative to CO2 www.ipcc.ch

Scope 2 – Indirect emissions resulting from purchased electricity

  • World Resources Institute (2014). GHG Protocol tool for stationary combustion. Version 4.8, GHG Protocol Scope 2 guidance

Scope 3 – Emissions resulting from travel and transportation

  • Mobile Combustion GHG Protocol tool v.2.6
  • Supplement to the Corporate Value Chain (Scope 3) accounting and reporting standard
Environmental investments (%)

2017

2018

2019

2020

2021

% of total Company investments

0.47

0.17

0.35

3.06

2.71

Consumption – absolute values I 302-1 I 302-4 I

2017

2018

2019

2020

2021

Electricity (TJ(1))

7,812

8,094

8,208

8,716

8,995

Water (1,000m3)

17,064

18,204

18,843

20,223

21,445

Chemicals (tons)

20,118

23,127

21,780

20,641

24,881

Natural gas (TJ(1))

695

666

696

706

754

(1)

Terajoule.

Summary of net CO2 emissions (KTons) I 305-1 I 305-2 I 305-3 I SDG 13.1

2017

2018

2019

2020

2021

Direct emissions Scope 1

605

644

557

486

481

Indirect emissions (purchased electricity) Scope 2(1)

756

791

702

564

473

Other indirect emissions (transportation(2)) Scope 3

132

137

143

86

90

Total emissions

1,493

1,573

1,402

1,137

1,044

(1)

Market-based method calculation according to GHG Protocol standard.

(2)

The transportation emissions value is a global estimate of employee transportation and transportation of goods.

Environmental burden – net values SDG 3.9 - SDG 6.3

2017

2018

2019

2020

2021

Emissions to air

Global warming(1) (MTCE)

407,290

428,912

382,277

310,041

284,726

Ozone depletion (kg R11 Eq)

0.00

0.00

0.00

0.00

0.00

VOCs (tons)

287

297

139

148

193

Atmospheric acidification (Kg SO2 Eq)

36,084

43,856

46,018

51,207

62,178

Photochemical oxidant creation (Kg ethylene Eq)

49,166

43,749

35,799

38,295

49,548

Air emission toxicity(2) Kg PH3 Eq

1,595

2,240

1,414

3,192

3,717

Emissions to water(3)

Eutrophication (Kg (P+N))

176,555

164,027

169,575

126,286

184,147

Aquatic oxygen demand (Kg COD(4))

595,257

605,100

632,625

656,045

1,213,093

Heavy metals to water (Kg heavy metals)

11,560

14,222

9,233

6,880

9,162

Aquatic ecotoxicity (Kg Cu Eq)

6,208

5,764

5,211

4,290

5,033

(1)

Includes direct Greenhouse gas (GHG) emissions from our manufacturing plants and indirect emissions from energy consumption and transport, reported in Metric Tons of Carbon Equivalent (MTCE). Does not include GHG emissions from subcontractors and foundries.

(2)

Emissions of substances are considered only if they exceed the minimum threshold of 3ppm, expressed in phosphine equivalent. For Volatile Organic Compounds, Atmospheric acidification, Photochemical Oxidant Creation and Air emission toxicity, the particulate matter is not covered.

(3)

Domestic wastewater is included.

(4)

Total Chemical Oxygen Demand (COD).

Direct and indirect energy consumption by primary sources(1) (%) I 302-1 I 302-4 I

2017

2018

2019

2020

2021

Green electricity purchased

25.8

21.2

26.4

39.6

46.5

Photovoltaic and thermal solar electricity produced by ST

0.1

0.1

0.1

0.1

0.1

Electricity purchased from nuclear (CO2 free)

12.1

9.2

6.9

6.1

6.2

Electricity purchased from fossil fuel sources

53.7

61.8

58.6

46.6

38.7

Natural gas

8.1

7.6

7.8

7.5

7.7

Other fuels

0.3

0.3

0.3

0.2

0.9

(1)

The sums may not add up to 100% due to rounding of the figures.

Energy consumption by source I 302-1 I 302-4 I

2017

2018

2019

2020

2021

Electricity (TJ(1))

7,812

8,094

8,208

8,716

8,995

Natural gas (TJ(1))

695

666

696

706

754

Others (TJ(1))

24

22

22

31

96

Total energy (TJ(1))

8,531

8,782

8,926

9,453

9,845

Energy from electricity (%)

91.6%

92.2%

92.0%

92.2%

91.4%

(1)

Terajoule.

Renewable electricity (%)

2017

2018

2019

2020

2021

Renewable electricity/total electricity purchased

28.3

23.1

30.0

43.0

50.9

Consumption of energy I 302-3 I SDG 7.3
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of energy

88

81

86

99

81

Baseline 100 in 2016.

Consumption of electricity I 302-3 I
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of electricity

88

82

86

99

81

Baseline 100 in 2016.

Consumption of natural gas I 302-3 I
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of natural gas

86

73

80

88

74

Baseline 100 in 2016.

Carbon footprint of ST’s products per mode of transportation (%)

2017

2018

2019

2020

2021

Air <2,000km

19.2

18.6

22.0

0.7

0.8

Air >2,000km

78.9

79.7

76.4

97.9

97.6

Road

1.9

1.8

1.7

1.4

1.6

Ocean

0.0

0.0

0.0

0.0

0.0

Consumption of water
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of water

89

84

91

106

89

Baseline 100 in 2016.

Water withdrawal by source (1,000m3)(1) I 303-3 I SDG 6.4

2017

2018

2019

2020

2021

Groundwater

3,055

4,236

3,029

2,880

2,747

Surface water

-

0

0

0

0

Municipal water supplies

14,009

13,967

15,814

17,342

18,698

Total withdrawal

17,064

18,204

18,843

20,223

21,445

(1)

The sums may not add up due to rounding of the figures

Recycled and reused total water I 303-5 I SDG 6.3 - SDG 6.4

2017

2018

2019

2020

2021

Ultrapure water used (1,000m3)

-

-

11,243

12,331

13,194

Total water used (1,000m3)

29,920

30,654

31,708

34,055

35,888

Total volume of water recycled and reused (1,000m3)

12,857

12,450

12,870

13,833

14,445

Water recycled and reused (%)

43.0%

40.6%

40.6%

40.6%

40.3%

Total water discharge

2017

2018

2019

2020

2021

Water discharge (1,000m3)

14,406

14,926

15,621

15,912

17,878

Treated in ST wastewater treatment plant (%)

78%

68%

69%

85%

86%

Treated in external wastewater treatment plant(1) (%)

58%

57%

55%

56%

59%

(1)

Part of this water has already been treated in ST wastewater treatment plants, meaning that 100% of water discharged is treated either internally, externally, or both.

Waste in tons I 306-2 I SDG 12.4

2017

2018

2019

2020

2021

Total hazardous waste

14,361

16,483

16,877

19,605

22,568

Total waste

39,615

44,828

43,593

49,012

55,672

Waste split in tons I 306-2 I

2017

2018

2019

2020

2021

Reuse

1,543

2,097

1,614

3,628

3,825

Sent for recycling

32,182

34,434

33,607

33,653

38,952

Recovery(1)

2,244

4,642

5,224

5,944

7,559

Incineration

2,128

1,671

1,497

2,809

1,538

Landfill

1,519

1,983

1,651

2,977

3,798

Total waste

39,615

44,828

43,593

49,012

55,672

(1)

Waste burnt with recovery of energy (combustion).

Non-hazardous waste split(1) (%) I 306-2 I

2017

2018

2019

2020

2021

Reuse

3.7

5.0

3.5

10.0

9.7

Sent for recycling

88.9

83.9

86.1

69.1

72.6

Recovery(2)

1.7

3.3

3.6

4.4

4.1

Incineration

1.4

2.4

2.4

7.8

3.2

Landfill

4.5

5.4

4.4

8.8

10.3

(1)

The sums may not add up to 100% due to rounding of the figures.

(2)

Waste burnt with recovery of energy (combustion).

Hazardous waste split (%) I 306-2 I SDG 12.4

2017

2018

2019

2020

2021

Reuse

4.1

3.1

3.1

3.5

2.7

Sent for recycling

62.7

71.8

70.9

68.0

66.1

Recovery(1)

18.5

18.3

20.0

23.8

27.5

Incineration

12.2

4.8

3.9

2.7

2.1

Landfill

2.5

2.0

2.1

2.0

1.7

(1)

Waste burnt with recovery of energy (combustion).

WEEE

As a supplier of components to the electronics industry (and not a manufacturer of electronic equipment), our silicon products are not directly affected by the European Directive 2012/19/ EU Waste of Electrical and Electronic Equipment (WEEE). However, since 2018, demonstration and evaluation boards supplied by ST are subject to the Directive.

Consumption of chemicals SDG 12.4
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of chemicals

97

100

98

101

96

Baseline 100 in 2016.

Elimination of Substances of Very High Concern (SVHC) SDG 12.4

2017

2018

2019

2020

2021

Total number of action plans(1) completed since 2008

23

23

23

23

24

(1)

One substance can be subject to several action plans to be eliminated from different ST processes.

ST exposure to Substances of Very High Concern (SVHC)

2017

2018

2019

2020

2021

SVHC total list

176

191

201

209

219

SVHC used in ST

23

26

27

30

34

SVHC Annex XIV used in ST

1

1

3

4

4

Total SVHC used in ST replaced since 2008

7

7

7

7

7

Deployment of ST substances specification to key suppliers and subcontractors (%)

2017

2018

2019

2020

2021

Response rate from key partners

100

100

97

100

99

Commitment from key partners to ST substances specification

80

89

72

91

91

Spills in 2021 | 306-3 |

None

Fines and non-monetary sanctions in 2021

Ang Mo Kio (Singapore): $400 paid for mosquito breeding offences according to the Control of Vectors and Pesticides Act, 1998.

Toa Payoh (Singapore): $200 paid for mosquito breeding offences according to the Control of Vectors and Pesticides Act, 1998.

This section includes indicators and GRI Standard disclosures.

Our environmental data covers our 11 largest manufacturing sites, representing more than 95% of the overall environmental impact of the Company.

The methodologies used to calculate data are detailed in internal Company procedures, which are regularly reviewed during third-party environmental audits (EMAS, ISO 14001, ISO 50001, ISO 14064).

See ST site certifications table in business indicators.

ST follows the Greenhouse Gas (GHG) Protocol for managing its GHG emissions. The resulting CO2 emissions are reported according to recognized international standards (Reference – World Resources Institute (2004) GHG Protocol – A Corporate Accounting and Reporting Standard).

Scope 1 – Direct emissions resulting from operations

  • Combustion emissions: World Resources Institute (2008) – GHG Protocol Calculation tool for stationary combustion v.4.1
  • PFC emissions: 2007 IPCC fourth Assessment Report Climate Change. Table 2.14. Lifetimes, radiative efficiencies and direct GWPs relative to CO2 www.ipcc.ch

Scope 2 – Indirect emissions resulting from purchased electricity

  • World Resources Institute (2014). GHG Protocol tool for stationary combustion. Version 4.8, GHG Protocol Scope 2 Guidance

Scope 3 – Emissions resulting from travel and transportation

  • Mobile Combustion GHG Protocol tool v.2.6
  • Supplement to the Corporate Value Chain (Scope 3) accounting and reporting standard
Environmental investments (%)

2017

2018

2019

2020

2021

% of total Company investments

0.47

0.17

0.35

3.06

2.71

Consumption – absolute values I 302-1 I 302-4 I

2017

2018

2019

2020

2021

Electricity (TJ(1))

7,812

8,094

8,208

8,716

8,995

Water (1,000m3)

17,064

18,204

18,843

20,223

21,445

Chemicals (tons)

20,118

23,127

21,780

20,641

24,881

Natural gas (TJ(1))

695

666

696

706

754

(1)

Terajoule.

Summary of net CO2 emissions (KTons) I 305-1 I 305-2 I 305-3 I SDG 13.1

2017

2018

2019

2020

2021

Direct emissions Scope 1

605

644

557

486

481

Indirect emissions (purchased electricity) Scope 2(1)

756

791

702

564

473

Other indirect emissions (transportation(2)) Scope 3

132

137

143

86

90

Total emissions

1,493

1,573

1,402

1,137

1,044

(1)

Market-based method calculation according to GHG Protocol standard.

(2)

The transportation emissions value is a global estimate of employee transportation and transportation of goods.

Environmental burden – net values SDG 3.9 - SDG 6.3

2017

2018

2019

2020

2021

Emissions to air

Global warming(1) (MTCE)

407,290

428,912

382,277

310,041

284,726

Ozone depletion (kg R11 Eq)

0.00

0.00

0.00

0.00

0.00

VOCs (tons)

287

297

139

148

193

Atmospheric acidification (Kg SO2 Eq)

36,084

43,856

46,018

51,207

62,178

Photochemical oxidant creation (Kg ethylene Eq)

49,166

43,749

35,799

38,295

49,548

Air emission toxicity(2) Kg PH3 Eq

1,595

2,240

1,414

3,192

3,717

Emissions to water(3)

Eutrophication (Kg (P+N))

176,555

164,027

169,575

126,286

184,147

Aquatic oxygen demand (Kg COD(4))

595,257

605,100

632,625

656,045

1,213,093

Heavy metals to water (Kg heavy metals)

11,560

14,222

9,233

6,880

9,162

Aquatic ecotoxicity (Kg Cu Eq)

6,208

5,764

5,211

4,290

5,033

(1)

Includes direct Greenhouse gas (GHG) emissions from our manufacturing plants and indirect emissions from energy consumption and transport, reported in Metric Tons of Carbon Equivalent (MTCE). Does not include GHG emissions from subcontractors and foundries.

(2)

Emissions of substances are considered only if they exceed the minimum threshold of 3ppm, expressed in phosphine equivalent. For Volatile Organic Compounds, Atmospheric acidification, Photochemical Oxidant Creation and Air emission toxicity, the particulate matter is not covered.

(3)

Domestic wastewater is included.

(4)

Total Chemical Oxygen Demand (COD).

Direct and indirect energy consumption by primary sources(1) (%) I 302-1 I 302-4 I

2017

2018

2019

2020

2021

Green electricity purchased

25.8

21.2

26.4

39.6

46.5

Photovoltaic and thermal solar electricity produced by ST

0.1

0.1

0.1

0.1

0.1

Electricity purchased from nuclear (CO2 free)

12.1

9.2

6.9

6.1

6.2

Electricity purchased from fossil fuel sources

53.7

61.8

58.6

46.6

38.7

Natural gas

8.1

7.6

7.8

7.5

7.7

Other fuels

0.3

0.3

0.3

0.2

0.9

(1)

The sums may not add up to 100% due to rounding of the figures.

Energy consumption by source I 302-1 I 302-4 I

2017

2018

2019

2020

2021

Electricity (TJ(1))

7,812

8,094

8,208

8,716

8,995

Natural gas (TJ(1))

695

666

696

706

754

Others (TJ(1))

24

22

22

31

96

Total energy (TJ(1))

8,531

8,782

8,926

9,453

9,845

Energy from electricity (%)

91.6%

92.2%

92.0%

92.2%

91.4%

(1)

Terajoule.

Renewable electricity (%)

2017

2018

2019

2020

2021

Renewable electricity/total electricity purchased

28.3

23.1

30.0

43.0

50.9

Consumption of energy I 302-3 I SDG 7.3
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of energy

88

81

86

99

81

Baseline 100 in 2016.

Consumption of electricity I 302-3 I
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of electricity

88

82

86

99

81

Baseline 100 in 2016.

Consumption of natural gas I 302-3 I
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of natural gas

86

73

80

88

74

Baseline 100 in 2016.

Carbon footprint of ST’s products per mode of transportation (%)

2017

2018

2019

2020

2021

Air <2,000km

19.2

18.6

22.0

0.7

0.8

Air >2,000km

78.9

79.7

76.4

97.9

97.6

Road

1.9

1.8

1.7

1.4

1.6

Ocean

0.0

0.0

0.0

0.0

0.0

Consumption of water
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of water

89

84

91

106

89

Baseline 100 in 2016.

Water withdrawal by source (1,000m3)(1) I 303-3 I SDG 6.4

2017

2018

2019

2020

2021

Groundwater

3,055

4,236

3,029

2,880

2,747

Surface water

-

0

0

0

0

Municipal water supplies

14,009

13,967

15,814

17,342

18,698

Total withdrawal

17,064

18,204

18,843

20,223

21,445

(1)

The sums may not add up due to rounding of the figures

Recycled and reused total water I 303-5 I SDG 6.3 - SDG 6.4

2017

2018

2019

2020

2021

Ultrapure water used (1,000m3)

-

-

11,243

12,331

13,194

Total water used (1,000m3)

29,920

30,654

31,708

34,055

35,888

Total volume of water recycled and reused (1,000m3)

12,857

12,450

12,870

13,833

14,445

Water recycled and reused (%)

43.0%

40.6%

40.6%

40.6%

40.3%

Total water discharge

2017

2018

2019

2020

2021

Water discharge (1,000m3)

14,406

14,926

15,621

15,912

17,878

Treated in ST wastewater treatment plant (%)

78%

68%

69%

85%

86%

Treated in external wastewater treatment plant(1) (%)

58%

57%

55%

56%

59%

(1)

Part of this water has already been treated in ST wastewater treatment plants, meaning that 100% of water discharged is treated either internally, externally, or both.

Waste in tons I 306-2 I SDG 12.4

2017

2018

2019

2020

2021

Total hazardous waste

14,361

16,483

16,877

19,605

22,568

Total waste

39,615

44,828

43,593

49,012

55,672

Waste split in tons I 306-2 I

2017

2018

2019

2020

2021

Reuse

1,543

2,097

1,614

3,628

3,825

Sent for recycling

32,182

34,434

33,607

33,653

38,952

Recovery(1)

2,244

4,642

5,224

5,944

7,559

Incineration

2,128

1,671

1,497

2,809

1,538

Landfill

1,519

1,983

1,651

2,977

3,798

Total waste

39,615

44,828

43,593

49,012

55,672

(1)

Waste burnt with recovery of energy (combustion).

Non-hazardous waste split(1) (%) I 306-2 I

2017

2018

2019

2020

2021

Reuse

3.7

5.0

3.5

10.0

9.7

Sent for recycling

88.9

83.9

86.1

69.1

72.6

Recovery(2)

1.7

3.3

3.6

4.4

4.1

Incineration

1.4

2.4

2.4

7.8

3.2

Landfill

4.5

5.4

4.4

8.8

10.3

(1)

The sums may not add up to 100% due to rounding of the figures.

(2)

Waste burnt with recovery of energy (combustion).

Hazardous waste split (%) I 306-2 I SDG 12.4

2017

2018

2019

2020

2021

Reuse

4.1

3.1

3.1

3.5

2.7

Sent for recycling

62.7

71.8

70.9

68.0

66.1

Recovery(1)

18.5

18.3

20.0

23.8

27.5

Incineration

12.2

4.8

3.9

2.7

2.1

Landfill

2.5

2.0

2.1

2.0

1.7

(1)

Waste burnt with recovery of energy (combustion).

WEEE

As a supplier of components to the electronics industry (and not a manufacturer of electronic equipment), our silicon products are not directly affected by the European Directive 2012/19/ EU Waste of Electrical and Electronic Equipment (WEEE). However, since 2018, demonstration and evaluation boards supplied by ST are subject to the Directive.

Consumption of chemicals SDG 12.4
Per unit of production – normalized values

2017

2018

2019

2020

2021

Consumption of chemicals

97

100

98

101

96

Baseline 100 in 2016.

Elimination of Substances of Very High Concern (SVHC) SDG 12.4

2017

2018

2019

2020

2021

Total number of action plans(1) completed since 2008

23

23

23

23

24

(1)

One substance can be subject to several action plans to be eliminated from different ST processes.

ST exposure to Substances of Very High Concern (SVHC)

2017

2018

2019

2020

2021

SVHC total list

176

191

201

209

219

SVHC used in ST

23

26

27

30

34

SVHC Annex XIV used in ST

1

1

3

4

4

Total SVHC used in ST replaced since 2008

7

7

7

7

7

Deployment of ST substances specification to key suppliers and subcontractors (%)

2017

2018

2019

2020

2021

Response rate from key partners

100

100

97

100

99

Commitment from key partners to ST substances specification

80

89

72

91

91

Spills in 2021 | 306-3 |

None

Fines and non-monetary sanctions in 2021

Ang Mo Kio (Singapore): $400 paid for mosquito breeding offences according to the Control of Vectors and Pesticides Act, 1998.
Toa Payoh (Singapore): $200 paid for mosquito breeding offences according to the Control of Vectors and Pesticides Act, 1998.