For Prelims: Ethanol Blending (E20), National Policy on Biofuels (2018), Bureau of Indian Standards (BIS), Alleged ethanol percentage in petrol, Mandated ethanol blending limit (E20), BIS standard for ethanol-blended petrol, Nodal bodies involved, Current context
For Mains: Biofuel blending, energy security, quality control, federal tensions, National Policy on Biofuels, BIS standards
Source:
Hindustan
Indian Express
5 facts for one-day exams
SSC, railway, police and teaching exams ask direct questions like these.
- Karnataka government alleged 31.2% ethanol in petrol samples.
- The mandated ethanol blending limit is 20% (E20).
- IOCL, BPCL and HPCL are the three major OMCs that denied the allegation.
- The BIS standard for ethanol-blended petrol is IS 17021.
- The National Policy on Biofuels (2018) targets 20% ethanol blending by 2025.
Why in the news?
A dispute has erupted between the Karnataka government and public-sector oil marketing companies (OMCs) over alleged excess ethanol blending in petrol, with the state claiming levels as high as 31.2% against the mandated 20% (E20) limit. OMCs have rejected the findings, stating the tests were not conducted as per the prescribed legal and technical procedures under the BIS IS 17021 standard. The issue highlights challenges in the implementation of the National Policy on Biofuels and the E20 roadmap.
Summary
- Karnataka's Food and Civil Supplies Minister alleged that petrol samples at some retail outlets contained 26% to 31.2% ethanol, exceeding the E20 limit of 20%.
- Three major OMCs — Indian Oil, Bharat Petroleum, and Hindustan Petroleum — issued a joint statement denying the allegations, saying the tests did not follow prescribed procedures under the Bureau of Indian Standards (BIS) IS 17021 standard.
- The dispute underscores the need for robust quality control mechanisms as India accelerates its ethanol blending programme under the National Policy on Biofuels (2018) and the E20 roadmap for 2025.
Highlights
Karnataka's Allegation
Karnataka government claims independent lab tests found 26% to 31.2% ethanol in petrol samples from OMC pumps, far above the 20% E20 limit.
OMCs' Denial
IOCL, BPCL and HPCL jointly rejected the findings, stating the tests were not conducted as per the BIS IS 17021 standard.
The E20 Policy
India aims to achieve 20% ethanol blending in petrol nationwide by 2025, as part of its National Policy on Biofuels and energy security goals.
Background
India's ethanol blending programme, governed by the National Policy on Biofuels (2018), targets 20% blending (E20) by 2025. The policy aims to reduce oil import dependence, support sugarcane farmers, and lower vehicular emissions. The Bureau of Indian Standards (BIS) has set IS 17021 as the standard for ethanol-blended motor gasoline. OMCs are responsible for blending and supply across the country.
Way Forward
A transparent, third-party testing mechanism agreed upon by both the central government and states may be needed. The Ministry of Petroleum and Natural Gas could issue a clarification on standard testing procedures. The incident may prompt a review of the E20 rollout timeline and enforcement of BIS standards at retail outlets.
Ethanol blending limits and claims
| Parameter | Mandated (E20) | Alleged (Karnataka) |
|---|---|---|
| Ethanol percentage | 20% | 26% to 31.2% |
| BIS standard | IS 17021 | Not followed (as per OMCs) |
Background GK
Textbook concepts you need to understand this news
- Ethanol Blending (E20)
- Ethanol blending is the process of mixing ethanol (an alcohol derived from sugarcane, maize, or biomass) with petrol to use as fuel. E20 means 20% ethanol and 80% petrol.
- National Policy on Biofuels (2018)
- A central government policy that sets targets for blending biofuels (ethanol and biodiesel) with conventional fuels to reduce import dependency, promote renewable energy, and support the agriculture sector.
- Bureau of Indian Standards (BIS)
- The national standards body of India, established under the BIS Act, 2016. It develops and enforces standards (like IS 17021) for products, including fuels, to ensure quality and safety.
Facts to remember
Tap a card to see the answer. Try to recall it first.
How exams will ask this
- Data: Alleged ethanol percentage: 31.2%; Mandated limit: 20% (E20)
- Nodal Body: Ministry of Petroleum and Natural Gas; Bureau of Indian Standards (BIS)
- Legal Point: IS 17021 standard of BIS for ethanol-blended motor gasoline
Don't make this mistake!
The examiner may swap 'E20' (20% ethanol, 80% petrol) with 'E85' (85% ethanol) or ask about the target year for E20 (2025) versus the current blending percentage in some states. They may also confuse the BIS standard number (IS 17021) with other fuel standards like IS 1460 for petrol.
Write these in mains answers
- Biofuel blending, energy security, quality control, federal tensions, National Policy on Biofuels, BIS standards
Stuck? Get it in one tap
- Karnataka government alleged 31.2% ethanol in petrol samples.
- The mandated ethanol blending limit is 20% (E20).
- IOCL, BPCL and HPCL are the three major OMCs that denied the allegation.
- The BIS standard for ethanol-blended petrol is IS 17021.
- The National Policy on Biofuels (2018) targets 20% ethanol blending by 2025.
- Economy: Energy security and biofuels
- Environment: Renewable energy and climate change
Related concepts: Ethanol Blending (E20), National Policy on Biofuels (2018), Bureau of Indian Standards (BIS)
Practice questions
Pick an answer, then read the explanation.
- Q1Easy
Which ministry is primarily responsible for the implementation of the ethanol blending programme in India?
Explanation: The ethanol blending programme is implemented by the Ministry of Petroleum and Natural Gas through its public sector oil marketing companies. The Ministry of Agriculture supports feedstock production, and the Ministry of Environment deals with emissions, but the core policy and implementation lie with the Petroleum Ministry.
- Q2Hard
Consider the following statements:
- 1.The National Policy on Biofuels (2018) set a target of 20% ethanol blending in petrol (E20) by 2030.
- 2.The Bureau of Indian Standards (BIS) has prescribed IS 17021 as the standard for ethanol-blended motor gasoline.
- 3.Karnataka government claimed that petrol samples contained up to 31.2% ethanol, exceeding the E20 limit.
Which of the statements given above is/are correct?
Explanation: Statement 1 is incorrect because the target for E20 was advanced to 2025, not 2030. Statement 2 is correct: IS 17021 is the BIS standard for ethanol-blended petrol. Statement 3 is correct: the Karnataka government alleged 31.2% ethanol in some samples. Hence option C is correct.
- Q3Medium
What is the maximum permissible ethanol blending percentage in petrol under the current E20 norms in India?
Explanation: The E20 norm permits a maximum of 20% ethanol blending in petrol. 10% (E10) was the previous target, 15% is not a standard target, and 31.2% is the alleged level in Karnataka, not the permitted limit.
- Q4Medium
What is the primary objective of India's ethanol blending programme as outlined in the National Policy on Biofuels?
Explanation: The ethanol blending programme primarily aims to reduce India's dependence on imported crude oil, support the agricultural sector (sugarcane and maize farmers), and promote cleaner, renewable fuel sources. Revenue and price reduction are secondary, and a complete phase-out of petrol is not a stated objective.
Frequently asked questions
1. What is the E20 ethanol blending target in India?
E20 means 20% ethanol blended with petrol. India aims to achieve this target nationwide by 2025 under the National Policy on Biofuels.
2. Which companies are involved in the ethanol blending dispute in Karnataka?
The three major public sector oil marketing companies are Indian Oil Corporation (IOCL), Bharat Petroleum Corporation (BPCL), and Hindustan Petroleum Corporation (HPCL).
3. What is the BIS standard for ethanol-blended petrol?
The Bureau of Indian Standards (BIS) has prescribed IS 17021 as the standard for ethanol-blended motor gasoline.
4. Who is the Chief Minister of Karnataka who made the allegation?
D.K. Shivakumar is the Chief Minister of Karnataka who alleged that petrol samples contained up to 31.2% ethanol.
All sources
- Original7 November 2026 · Read story
- Merged7 November 2026 · Read story
