In 2025, ISS completed a corporate carbon footprint assessment and publicly disclosed its greenhouse gas (GHG) emissions according to the GHG Protocol, covering Scope 1 (direct emissions from owned or controlled sources), Scope 2 (indirect emissions from purchased energy) and Scope 3 (indirect emissions across the value chain).
ISS has also provided a category-level breakdown for 10 out of 15 Scope 3 emissions categories, offering greater transparency into its value chain emissions.
| Metric (tCO2e) | 2025 | 2024 | 2023 | 2022-2019 |
|---|---|---|---|---|
Total Scope 1 | 69,499a | 70,357a | 66,153b | |
Total Scope 2 | ||||
Market-Based | 10,661a | 9,507a | 10,301b | |
Location-Based | 5,885a | 5,484a | 6,205b | |
Total Scope 3 | 2,195,154a | 2,156,377a | 1,617,882b | |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 5.214a | 6.0271a | 5.6778b |
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In 2025, the total operational greenhouse gas (GHG) emissions of ISS amounted to 75,384 metric tons of CO2 equivalent. This figure includes both direct emissions from owned or controlled sources (Scope 1) and indirect emissions from purchased energy (Scope 2).a
Compared to 2024, the total operational greenhouse gas (GHG) emissions of ISS decreased by 0.6%, showing that the company has made progress in taking action to reduce the climate impact of its operations.a
In 2025, the total Scope 1 emissions of ISS were 69,499 metric tons of CO₂ equivalent (tCO₂e).a
Since 2019, ISS's Scope 1 emissions have decreased by 18.78%, reflecting a declining long-term trend in Scope 1 emissions over time.a
Compared to the previous year (2024), ISS's Scope 1 emissions decreased by 1.22%, highlighting the company's efforts to lower direct emissions from assets it owns or controls.a
In 2025, ISS reported Scope 2 greenhouse gas (GHG) emissions of 10,661 tCO₂e using the market-based method and 5,885 tCO₂e using the location-based method.a
Since 2019, ISS's Scope 2 greenhouse gas (GHG) emissions (Location-Based) have decreased by 38.81%, reflecting a declining long-term trend in Scope 2 emissions over time.a
Compared to the previous year (2024), ISS's Scope 2 emissions (Location-Based) have remained relatively stable, indicating that ISS's emissions have plateaued with no significant change in its energy consumption footprint.a
In 2025, ISS reported its Scope 2 emissions using the market-based method and using the location-based method.a
In 2025, ISS reported 2,195,154 metric tons of CO₂ equivalent (tCO₂e) of Scope 3 greenhouse gas (GHG) emissions, representing indirect emissions across its upstream and downstream value chain.a
The 2025 disclosure of ISS includes a breakdown across 10 of the 15 Scope 3 categories defined by the GHG Protocol, matching the level of disclosure in 2024, demonstrating consistent Scope 3 emissions reporting coverage year over year.a
In 2025, ISS reported total Scope 3 emissions of 2,195,154 metric tons of CO₂ equivalent (tCO₂e).a
Approximately 74.14% of these emissions originated from upstream activities such as purchased goods and capital goods, while 25.86% came from downstream activities like product use, distribution, and end-of-life treatment.a
Since 2019, ISS's Scope 3 emissions have increased by 10.67%, reflecting a rising long-term trend in Scope 3 emissions over time.a
Compared to the previous year (2024), ISS's Scope 3 emissions remained relatively stable, indicating that ISS's emissions have plateaued with no significant change in its value chain footprint.a
In 2025, ISS reported emissions for 10 out of the 15 Scope 3 categories defined by the GHG Protocol.a
This reflects a high level of granularity and transparency in the company's emissions reporting.
In 2025, the largest contributors to ISS's Scope 3 emissions were:a
In 2025, ISS reported Scope 1 greenhouse gas (GHG) emissions of 69,499 tCO₂e and total revenues of USD 13,329 millions. This translates into an emissions intensity of 5.21 tCO₂e per millions USD.a
In 2025, ISS reported a Scope 1 emissions intensity of 5.21 tCO₂e per millions USD. Compared to the peer group median of 3.22, this places the company above its industry benchmark, indicating it is less carbon-efficient than most competitors.a
In 2025, ISS ranked 14 out of 24 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
ISS is therefore positioned in the mid-range of its industry, neither a clear leader nor a laggard in carbon efficiency.a
In 2025, ISS reported a total carbon footprint of 2,270,538 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 1.72% increase compared to 2024, suggesting a rise in emissions across its operations or value chain.a
The largest contributor to ISS's total carbon footprint was Scope 3 emissions, accounting for 96.68% of the company's total carbon footprint, followed by Scope 1 emissions at 3.06%.a