What is the common examiner trap about Science & Tech in UPSC exams?

An examiner may swap E. coli with general coliforms. While E. coli is a faecal coliform, coliforms themselves are mostly harmless and only indicate possible contamination. The trap option in the article's post-read question states 'E. coli is not part of faecal coliforms' or 'these bacteria directly pose a danger'—both are false. Also, 'antibiotic resistance' is often confused with the broader 'antimicrobial resistance.'

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News 21 of 22

CAG Report Finds E. coli in Drinking Water at 8 Railway Stations, Recommends Water Quality Protocol

Q: Which institution prepared the report 'Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways', as mentioned in the news?

Comptroller and Auditor General of India, The article states that the Comptroller and Auditor General (CAG) flagged violations of water quality norms in this report. The CAG is India's constitutional audit authority responsible for auditing government receipts and expenditure.

Q: Consider the following statements regarding E. coli: 1. E. coli is commonly found in the intestines of people and animals. 2. E. coli can cause infection only when ingested in large amounts. 3. Some E. coli strains have become drug-resistant because of overuse of antibiotics. Which of the statements given above is/are correct?

Both 1 and 3, Statement 1 is correct because the article says E. coli is commonly found in the intestines of people and animals. Statement 2 is incorrect because even small amounts of E. coli can cause infection. Statement 3 is correct as the article notes some strains have become drug-resistant due to overuse of antibiotics.

Q: According to the CAG report, at how many of the total sampled railway stations was E. coli detected in drinking water samples from water coolers?

8 out of 49 stations, The report said E. coli bacteria was detected in drinking water samples collected from eight railway stations out of 49 stations. The other options combine wrong numbers of stations or platform-tap samples.

Q: Which of the following best explains why the presence of E. coli in drinking water is a serious health concern?

It indicates possible faecal contamination and can cause infection even in small amounts, leading to diarrhoea, UTI, vomiting or sepsis., The article highlights that E. coli is a faecal coliform; its presence in water signals sewage contamination. Unlike many bacteria, tiny amounts can cause digestive and urinary infections, and in severe cases sepsis, making water unsafe for passengers.

Q: What should UPSC aspirants remember about Science & Tech for Prelims?

1. Target this Data: E. coli found in 8 of 49 stations; total coliform in platform taps at 49 stations (2022-23) and 56 stations (2023-24). 2. Target this Report: 'Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways' by the Comptroller and Auditor General (CAG). 3. Target this Protocol: Uniform Drinking Water Quality Protocol.

Science & Tech Polity EnvironmentHIGH

Target:UPSC GS-IIIMPSCSSC GATeachingPrelims HighMains MediumStatic GK Link

17 Aug 2026

~2 min

Source: Indian Express

Key Data:8 out of 49 railway stations49 stations (2022-23)56 stations (2023-24)8 railway zones (2022-23)9 railway zones (2023-24)

Bodies:Comptroller and Auditor General (CAG)Indian RailwaysWorld Health Organisation (WHO)

Practice MCQs from today's news ▸

~2 min · Quick mode

What This Article Covers

1.CAG report found E. coli in drinking water samples at 8 of 49 railway stations, including Mumbai local stations; total coliform was found at 49 stations in 2022-23 and 56 in 2023-24.

2.E. coli is a faecal coliform found in animal and human intestines; its presence in water indicates sewage contamination and can cause diarrhoea, UTI, and sepsis even in small amounts.

3.The audit also links to antimicrobial resistance (AMR): some E. coli strains have become drug-resistant due to antibiotic overuse, a key theme for exams.

The Big Picture

Prelims · HighMains · Medium

CAG has found E. coli in drinking water at eight railway stations, exposing poor water quality and sanitation oversight. Since E. coli can cause infection even in tiny amounts and some strains are becoming drug-resistant, the report raises public-health and antimicrobial resistance concerns a UPSC candidate must link to governance and service delivery.

Exam Lens

Quick Exam Facts From News

CAG ReportPassenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways

Stations Positive for E. coli8 out of 49

Platform Tap Coliform Detection49 stations (2022-23); 56 stations (2023-24)

Zones Covered8 zones (2022-23); 9 zones (2023-24)

Health ImpactDiarrhoea, UTI, vomiting; sepsis in severe cases

1-Minute Revision

›CAG Report: Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways
›Stations Positive for E. coli: 8 out of 49
›Target this Data: E. coli found in 8 of 49 stations; total coliform in platform taps at 49 stations (2022-23) and 56 stations (2023-24).
›Target this Report: 'Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways' by the Comptroller and Auditor General (CAG).
›Target this Protocol: Uniform Drinking Water Quality Protocol.

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News Snapshot

🛤️

CAG Flags Water Contamination

Audit found E. coli in drinking water at 8 out of 49 railway stations, including Mumbai local stations.

🦠

E. coli Health Risk

Even a small amount of E. coli can cause diarrhoea, UTI, vomiting, and in severe cases sepsis.

💊

Antimicrobial Resistance Link

Some E. coli strains are becoming drug-resistant due to overuse of antibiotics, making treatment harder.

Detailed Analysis & Strategic Depth

Context: CAG Audit Findings

The Comptroller and Auditor General's report 'Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways' found E. coli in drinking water from water coolers at eight of 49 stations. It also detected total coliform bacteria from platform taps at 49 stations across eight zones in 2022-23 and 56 stations across nine zones in 2023-24.

What Makes E. coli Dangerous?

E. coli is a bacterial strain naturally found in the intestines of humans and animals. Unlike some pathogens, it can cause infection even when ingested in small amounts. Consumption of contaminated water causes diarrhoea, digestive issues, UTI and vomiting; children are more vulnerable. The toxin can damage the small-intestine lining, causing bloody diarrhoea and even sepsis.

Governance and Service Delivery Failure

The detection of faecal coliform in railway drinking water indicates poor maintenance of sewage and water lines. CAG recommended strict compliance with prescribed protocols, comprehensive testing under the Uniform Drinking Water Quality Protocol, and proper inspection of water supply systems. This exposes accountability gaps in public infrastructure despite audit oversight.

Antimicrobial Resistance (AMR) Dimension

E. coli infections are treatable with antibiotics, but certain strains have become drug-resistant due to overuse. Antimicrobial resistance is the broader phenomenon where bacteria, viruses, fungi and parasites stop responding to drugs. In the absence of injectable antibiotics, resistant E. coli in the bloodstream can provoke sepsis, making this a serious public-health challenge.

Way Forward and Exam Relevance

Railways must institute regular water-quality surveillance and sanitise supply lines, while health authorities should prevent antibiotic misuse. For exams, this news links CAG's audit role, environmental sanitation, and AMR containment in one public-health governance case.

Key Facts at a Glance

CAG ReportPassenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways

Stations Positive for E. coli8 out of 49

Platform Tap Coliform Detection49 stations (2022-23); 56 stations (2023-24)

Zones Covered8 zones (2022-23); 9 zones (2023-24)

Health ImpactDiarrhoea, UTI, vomiting; sepsis in severe cases

You've read the full analysis. Now test your understanding.

Practice exam-style questions based on this article.

Q1Static LinkageEasyUPSC, SSC, State PSC

Which institution prepared the report 'Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways', as mentioned in the news?

Q2Statement-basedHardUPSC, SSC, State PSC

Consider the following statements regarding E. coli:

1. E. coli is commonly found in the intestines of people and animals.

2. E. coli can cause infection only when ingested in large amounts.

3. Some E. coli strains have become drug-resistant because of overuse of antibiotics.

Which of the statements given above is/are correct?

Q3Data-centricMediumUPSC, SSC, State PSC

According to the CAG report, at how many of the total sampled railway stations was E. coli detected in drinking water samples from water coolers?

Q4Application/ImpactMediumUPSC, SSC, State PSC

Which of the following best explains why the presence of E. coli in drinking water is a serious health concern?

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CAG Report Finds E. coli in Drinking Water at 8 Railway Stations, Recommends Water Quality Protocol

Exam Lens

Quick Exam Facts From News

1-Minute Revision

News Snapshot

CAG Flags Water Contamination

E. coli Health Risk

Antimicrobial Resistance Link

Detailed Analysis & Strategic Depth

Context: CAG Audit Findings

What Makes E. coli Dangerous?

Governance and Service Delivery Failure

Antimicrobial Resistance (AMR) Dimension

Way Forward and Exam Relevance

Prelims Flashpoints

Key Facts at a Glance