In 2023, NorthWestern conducted an environmental assessment and disclosed corporate waste management data in accordance with recognized sustainability reporting standards.The company provided a breakdown of its waste by type (hazardous vs non-hazardous) and treatment method (recovery vs disposal), enabling greater transparency into its waste handling and environmental practices.
| Metric (tonnes) | 2023 | 2022 | 2021 | 2020-2019 |
|---|---|---|---|---|
Total Waste Generated | 142,647a | 141,549a | 137,839a | |
Total Waste Recovered | 12,790.3a | 11,908.16a | 16,946.088a | |
Total Hazardous Waste Generated | 18a | 20a | 36a | |
Non-Hazardous Waste Disposed | N/A | N/A | N/A |
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In 2023, NorthWestern generated a total of 142,647 metric tonnes of waste.a
Of this amount, 0.01% of NorthWestern's total waste generated of was classified as hazardous waste, characterized by properties such as toxicity, flammability, corrosiveness, or reactivity that may pose risks to human health, ecosystems, or the environment.0.6% was identified as non-hazardous waste, generally considered less harmful and subject to lighter regulatory controls.The remaining 99.39% was either treated using unspecified methods or not clearly categorized.a
Since 2020, NorthWestern's total waste generation rose by 2.93%, yet remained stable in 2023, suggesting recent efforts may have paused further escalation, though historical accumulation remains a concern.a
Over the same period, NorthWestern reduced the hazardousness of its waste by 59.33%, with a further 10.69% decline in 2023, suggesting a sustained and meaningful shift toward safer waste profiles and lower environmental impact.a
Overall, NorthWestern's waste and hazardousness trends are mixed or inconclusive. A more detailed review of its materials, industry standards, and operational changes would help clarify the net environmental impact of its waste strategy.a
In 2023, NorthWestern reported that 18 metric tonnes of its total waste output were classified as hazardous. This represents 0.01% of its overall waste generation.a
The company treated this hazardous waste using a combination of methods.A majority (61.11%) was diverted from disposal through recovery-oriented treatments such as recycling or reuse. This suggests that NorthWestern has established processes to reduce the environmental burden of its most harmful waste streams.a