Environmental indicators

This section includes indicators and GRI Standard disclosures.

Our environmental data covers our 11 main 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). 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 https://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

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

	2015	2016	2017	2018	2019
(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.
Direct emissions (operations) Scope 1	575	552	605	644	557
Indirect emissions (purchased electricity) Scope 2(1)	748	739	756	791	702
Other indirect emissions (transportation(2)) Scope 3	135	113	132	137	143
Total emissions	1,459	1,404	1,493	1,573	1,402

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Environmental burden – net values SDG 3.9 – SDG 6.3

	2015	2016	2017	2018	2019
(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).
Emissions to air
Global warming(1) (MTCE)	397,832	382,909	407,290	428,912	382,277
Ozone depletion (kg R11 Eq)	0.25	0.14	0.00	0.00	0.00
VOCs (Tons)	224	231	287	297	139
Atmospheric acidification (Kg SO2 Eq)	34,170	32,283	36,084	43,856	46,018
Photochemical oxidant creation (Kg ethylene Eq)	31,498	46,186	49,166	43,749	35,799
Air emission toxicity(2) Kg PH3 Eq	2,063	2,529	1,595	2,240	1,414
Emissions to water(3)
Eutrophication (Kg (P+N))	259,428	160,155	176,555	164,027	169,575
Aquatic oxygen demand (Kg COD(4))	474,486	508,468	595,257	605,100	632,625
Heavy metals to water (Kg Heavy metals)	6,022	8,217	11,560	14,222	9,233
Aquatic ecotoxicity (Kg Cu Eq)	4,097	5,114	6,208	5,764	5,211

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

	2015	2016	2017	2018	2019
Baseline 100 in 2010.
Consumption of energy	109	109	97	89	94

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Water withdrawal by source (1000m³)⁽¹⁾ I 303-1 I SDG 6.4

	2017	2018	2019
(1) The sums may not add up due to rounding of the figures.
Ground water	3,055	4,236	3,029
Surface water	-	0	0
Municipal water supplies	14,009	13,967	15,814
Total withdrawal	17,064	18,204	18,843

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Recycled and reused total water I 303-3 I SDG 6.3 – SDG 6.4

	2015	2016	2017	2018	2019
Total water used (1,000m3)	29,022	29,219	29,920	30,654	31,708
Total volume of water recycled and reused (1,000m3)	13,080	12,798	12,857	12,450	12,870
Water recycled and reused (%)	45.1%	43.8%	43.0%	40.6%	40.6%

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Waste in tons I 306-2 I SDG 12.4

	2015	2016	2017	2018	2019
Total hazardous waste (tons)	10,406	11,291	14,361	20,173	21,092
Total waste (tons)	34,571	34,041	40,469	49,471	43,593

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Hazardous waste split⁽¹⁾ (%) I 306-2 I SDG 12.4

	2015	2016	2017	2018	2019
(1) The sums may not add up to 100% due to rounding of the figures. (2) Waste burnt with recovery of energy (combustion).
Reuse	26.4	19.1	4.1	3.1	3.1
Sent for recycling	48.5	49.7	62.7	71.8	70.9
Recovery(2)	15.0	24.6	18.5	18.3	20.0
Incineration	7.4	4.7	12.2	4.8	3.9
Landfill	2.7	1.8	2.5	2.0	2.1

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.

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

	2015	2016	2017	2018	2019
Baseline 100 in 2010.
Consumption of chemicals	117	108	105	108	106

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

	2015	2016	2017	2018	2019
(1) One substance can be subject to several action plans to be eliminated from different ST processes.
Total number of action plans(1) completed since 2008	22	23	23	23	23

Spills in 2019 I 306-3 I
None

Fines and non-monetary sanctions in 2019
Calamba (the Philippines) fined US$3,600 by Philippine Drug Enforcement Agency for importing a production material containing a controlled substance without the authorized documentation.