What is the selection process for CPCB Junior Environmental Engineer?

The selection process consists of a written Online CBT of 100 questions in 120 minutes covering Civil/Chemical Engineering, Environmental Laws, General Studies, and Aptitude, followed by a personal interview for shortlisted candidates. The written exam carries negative marking of 0.25 marks per wrong answer. Final merit is determined on the basis of combined performance in the written test and interview as per CPCB norms.

What are the job responsibilities of a CPCB Environmental Engineer?

A Junior Environmental Engineer at CPCB is responsible for inspection of industrial units, collecting and analyzing pollution samples, verifying compliance with effluent and emission standards, and preparing inspection reports. They assist senior officers in monitoring compliance with conditions under Water Act 1974 and Air Act 1981 consents. They also contribute to technical assessments for EIA projects under the EIA Notification 2006 and support pollution incident investigations in critically polluted areas.

How should I prepare for the environmental law section of CPCB engineer exam?

Start with the Environment Protection Act 1986 and its schedules, then move to the Water (Prevention and Control of Pollution) Act 1974 and the Air (Prevention and Control of Pollution) Act 1981. Study the EIA Notification 2006 in detail, particularly the list of 39 project categories that require mandatory Environmental Impact Assessment. Also cover the Hazardous and Other Wastes (Management and Transboundary Movement) Rules 2016, E-Waste Management Rules, and Plastic Waste Management Rules. CPCB guidelines and standards documents are available on the official website and should be used as primary reference material.

Is there a difference between CPCB Scientist-B and CPCB Junior Environmental Engineer roles?

Yes. The Scientist-B role is primarily research and monitoring-oriented, requiring an M.Sc. background, and focuses on environmental science, data analysis, and policy advisory functions. The Junior Environmental Engineer position is technically oriented toward engineering solutions, industrial compliance inspections, and design of pollution control infrastructure, requiring a B.E./B.Tech degree. Both roles operate under the Central Pollution Control Board and require knowledge of key environmental legislations, but the engineer role has a stronger field inspection and compliance enforcement component.

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CPCB Junior Environmental Engineer Preparation Guide

Q: Which engineering subjects are important for CPCB environmental engineer exam?

Candidates should focus on fluid mechanics, wastewater treatment, solid waste management, air pollution control equipment, and environmental chemistry from Civil and Chemical Engineering. Knowledge of the Environment Protection Act 1986, Water Act 1974, Air Act 1981, and EIA Notification 2006 is mandatory. CPCB issues Consent to Establish and Operate licenses and monitors 17 critically polluted industrial clusters, so understanding industrial effluent standards and ambient air quality standards is essential.

Central Pollution Control Board

Your Complete Preparation Guide for CPCB Junior Environmental Engineer 2027 — strategy, study plan, tips & more.

DifficultyHard

Total Marks100

Duration120 min

Start Practising Now →Free Mock Tests

Exam Overview

Mode

Online CBT

Frequency

As per vacancy notification

Next Exam Date

2026-10-20

EEligibility Criteria

B.E./B.Tech in Civil, Chemical, or Environmental Engineering with minimum 60% marks. Age limit 30 years with standard government relaxations for reserved categories.

ANumber of Attempts

No specified attempt limit; age-bar applies

Study Plan by Subject

Civil/Chemical Engineering

Week 1-4: Foundation

Core concepts & basics

Week 5-8: Deep Practice

Advanced problems & revision

Week 9-12: Mock Tests + Revision

Full-length tests & weak-area focus

Refer to official syllabus for complete topic list

Environmental Laws

Week 1-4: Foundation

Core concepts & basics

Week 5-8: Deep Practice

Advanced problems & revision

Week 9-12: Mock Tests + Revision

Full-length tests & weak-area focus

Refer to official syllabus for complete topic list

General Studies

Week 1-4: Foundation

Core concepts & basics

Week 5-8: Deep Practice

Advanced problems & revision

Week 9-12: Mock Tests + Revision

Full-length tests & weak-area focus

Refer to official syllabus for complete topic list

Aptitude

Week 1-4: Foundation

Core concepts & basics

Week 5-8: Deep Practice

Advanced problems & revision

Week 9-12: Mock Tests + Revision

Full-length tests & weak-area focus

Refer to official syllabus for complete topic list

Expert Preparation Tips

Focus on wastewater treatment processes (biological, chemical, physical), air pollution control devices (ESPs, scrubbers, bag filters), and solid waste management — these form the core of engineering questions.

Read the Environment Protection Act 1986, Water Act 1974, Air Act 1981, and EIA Notification 2006 in full; many questions are directly lifted from the text of these Acts.

Practice numerical problems on effluent treatment plant design, BOD/COD calculations, stack emission calculations, and noise pollution levels.

Download CPCB annual status reports on water quality, air quality, and hazardous waste to stay current on data points that appear in General Studies questions.

Exam Pattern at a Glance

Section	Questions	Marks	Duration (est.)
Civil/Chemical Engineering	25	25	30 min
Environmental Laws	25	25	30 min
General Studies	25	25	30 min
Aptitude	25	25	30 min
Total	100	100	120 min

Important Dates

Registration Opens

2026-08-10

Next Exam Date

2026-10-20

Conducted By

Central Pollution Control Board

Frequently Asked Questions

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