Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 273

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 273
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 31          |     | 2024 |       |     | 2023 |        |     | 2022 |        |
|:----------------------------|:----|:-----|------:|:----|:-----|-------:|:----|:-----|-------:|
| SO2 (tonnes)                |     |      |   870 |     |      |  1,100 |     |      |  1,200 |
| NOx (tonnes)                |     |      | 8,700 |     |      | 11,000 |     |      | 11,000 |
| Particulate matter (tonnes) |     |      |   320 |     |      |    460 |     |      |    360 |
| Mercury (kilograms)         |     |      |    16 |     |      |     21 |     |      |     21 |

Water Our principal water use is for cooling and steam generation in our coal and gas facilities, but our hydro operations also require water flow for operations. Water for coal and gas operations is withdrawn primarily from rivers where we hold permits and must therefore adhere to regulations on the quality of discharged water. The difference between withdrawal and discharge, representing consumption, is due to several factors, which include evaporation loss and steam production for customers, which we are unable to recover. In 2022, we achieved our water consumption reduction target to reduce fleet-wide water consumption (withdrawals minus discharge) by 20 million m 3or 40 per cent in 2026 over the 2015 baseline. Water consumption in 2015 was 45 million m 3. This target is in line with the UN SDGs, specifically “Goal 6: Clean Water and Sanitation.” In 2024, we retained the achievement of this target. In 2025, TransAlta set a new target “By 2030, maintain water consumption intensity at 2023 levels”. In 2024, we withdrew approximately 237 million m 3(2023 – 273 million m 3) and returned approximately 212 million m 3(2023 – 239 million m 3) or 90 per cent. Overall, water consumption was approximately 25 million m 3(2023 – 34 million m 3). The following table represents our water withdrawal, water discharge and total water consumption (million m 3). Some values do not