India has set a phased mandate to blend 3% to 5% of compressed biogas (CBG) with CNG by 2029 under the GOBARdhan scheme. While industry studies suggest 20% blending is required for carbon neutrality, investors should track how City Gas Distribution companies manage the infrastructure and feedstock logistics required for this transition.
India is accelerating its transition toward a greener transport sector by integrating compressed biogas, or CBG, into the existing CNG supply chain. The government has formalised a mandatory phased blending target, aiming for 3% in fiscal year 2026-27, rising to 4% in 2027-28, and reaching 5% from 2028-29 onwards. This official roadmap, supported by the Rs 23,731 crore GOBARdhan National Circular Bioenergy Scheme, aims to reduce the nation's reliance on imported liquefied natural gas and promote a circular economy by converting waste into fuel.
While official targets focus on a gradual 5% increase, a recent assessment by The Energy and Resources Institute, or TERI, highlights that achieving full life-cycle carbon neutrality for the CNG sector could eventually require blending levels as high as 20%. This difference between the government's near-term 5% mandate and the industry's long-term 20% vision underscores the significant scaling required in both supply infrastructure and waste collection.
Impact on City Gas Distribution Companies
The implementation of these targets directly involves City Gas Distribution, or CGD, companies such as Indraprastha Gas, Mahanagar Gas, and Gujarat Gas. These entities serve as the primary offtakers for the gas, and the government has set an administered procurement price of Rs 2,110 per MMBTU for CBG to ensure stability. For these companies, higher blending is a double-edged sword. While it supports long-term goals of reducing reliance on expensive imported gas, it also requires them to integrate thousands of decentralized biogas plants into their existing city gas grids. Unlike traditional natural gas, which arrives through major transmission pipelines, biogas production is distributed, creating a complex logistical challenge for these distributors.
Execution and Supply Chain Risks
For investors, the success of this transition depends on more than just government policy; it hinges on execution on the ground. The primary challenge is the supply chain for feedstock. Biogas plants rely on consistent access to agricultural and organic waste, which is seasonal and geographically scattered. If the supply of raw material is inconsistent, the production of biogas could face bottlenecks, potentially making it difficult for CGD players to meet the mandatory blending percentages. Additionally, connecting these decentralized plants to the national gas grid requires new pipeline infrastructure, which adds to the operational cost.
Another point for shareholders to consider is the sensitivity of project profitability. Although the government has set a floor price for procurement, the overall business model remains dependent on efficient waste collection and processing. If the government revises its pricing policies or if the cost of collecting feedstock rises significantly, the margins for plant operators and the overall economics for CGD distributors could face pressure. Monitoring the progress of the GOBARdhan scheme, specifically regarding the commissioning of new plants and the stabilization of the supply chain, will be critical in the coming quarters.