Mumbai airport joins an elite group of only 30 global hubs achieving the highest carbon management standard, with a roadmap to eliminate Scope 3 emissions by 2050.
Chhatrapati Shivaji Maharaj International Airport (CSMIA), operated by Mumbai International Airport Limited (MIAL), has achieved Level 5 accreditation under the Airport Carbon Accreditation (ACA) programme, the highest tier in the globally recognised carbon management framework. This milestone confirms that CSMIA has reached operational net zero for Scope 1 and 2 emissions and has a validated plan to achieve net zero Scope 3 emissions by 2050.
The accreditation places CSMIA among just 30 airports worldwide, including seven in Asia-Pacific and four in India, that have demonstrated advanced decarbonisation maturity. ACA Level 5 represents the most stringent standard for carbon management, requiring airports to eliminate direct emissions and establish a credible pathway for indirect emissions reduction.
MIAL’s achievement builds on its long-term sustainability strategy, underpinned by a robust ESG policy and a cross-functional carbon management committee. Since FY2022, the airport has implemented transformative measures, including:
- Transition to 100 per cent renewable electricity since August 2022
- Over 40 per cent improvement in energy intensity through upgrades such as EC fans, LED lighting and high-efficiency HVAC systems
- Full electrification of the airport vehicle fleet and replacement of high-GWP refrigerants
- Deployment of advanced automation and CO₂-based fire systems
- Strengthened carbon governance with an updated ESG policy in May 2025
These initiatives have delivered a reduction of more than 98 per cent in Scope 1 and 2 emissions since FY2022. In FY2025, CSMIA reported Scope 1 emissions of 566.3 tCO₂e, Scope 2 at zero, and Scope 3 at 5,158,197 tCO₂e.
Speaking on the achievement, a MIAL spokesperson said: “This accreditation places CSMIA among the world’s leading airports committed to sustainable aviation operations. We will continue to blend innovation with environmental responsibility, setting new benchmarks for the industry.”
Stefano Baronci, Director General of ACI Asia-Pacific & Middle East, added: “Achieving Level 5 reflects CSMIA’s sustained effort and collaboration with stakeholders to reduce emissions. With four Indian airports now at Level 5, the region is setting a strong example for global aviation.”
CSMIA’s climate strategy aligns with international frameworks including GRI and ISO 14064-1:2018, and supports sector-wide transitions such as Sustainable Aviation Fuel (SAF) adoption. The airport publishes annual sustainability reports to ensure transparency and performance benchmarking.
By integrating global standards and prioritising innovation, CSMIA continues to lead India’s aviation sector towards a low-carbon future, reinforcing its commitment to net zero by 2050.
