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Sanghamitra Deb

Content Writer | Updated On - Jul 29, 2025

GATE Syllabus 2026 for Environmental Science and Engineering has been made available by IISc Bangalore on the official website.

  • The Environmental Science and Engineering curriculum for GATE 2026 can be used to check out the different subjects and units that must be covered for the entrance exam.
  • GATE 2026 Environmental Science and Engineering paper is of 100 marks and consists of 65 Questions.
  • There are nine topic divisions and a general aptitude section in the GATE Environmental Science and Engineering program.
  • GATE 2026 General Aptitude and Mathematics Foundation sections account for 15 and 13 marks out of 100 Marks.
  • With the aid of the GATE 2026 Environmental Science and Engineering Syllabus, students can plan and prepare for the GATE 2026 to perform well and gain admission to their top-choice college.
  • The major topics that the candidates need to prepare for and are part of Environmental Science and Engineering are Water and wastewater Treatment and Management, Air and Noise Pollution, Solid and Hazardous Waste Management, Global and Regional Environmental Issues, Environmental Management, Sustainable Development, Mathematics Foundation, Environmental Chemistry, Environmental Microbiology, and Water Resources and Environmental Hydraulics

GATE 2026 Environmental Science and Engineering Syllabus

Candidates who wish to enroll in the GATE 2026 Environmental Science and Engineering program must thoroughly familiarise themselves with the required material to pass the exam. The GATE 2026 Environmental Science and Engineering syllabus is presented below.

Topic Sub-Topics
Mathematical Foundation
  • Linear Algebra: matrices and determinants, Eigenvalues and eigenvectors, and systems of linear equations.
  • Calculus: Limit, Continuity, Differentiability, and Functions local minimums and maximums, Taylor saga, Convergence tests, integrals that are definite and indefinite, using definite integrals to calculate area and volume derivatives, both partial and complete.
  • Differential Equations: first-order ordinary differential equations (ODE), both linear and nonlinear Cauchy's and Euler's equations, higher order linear ODEs with constant coefficients, the Laplace transform, and its use in solving linear ODEs.
  • Statistics and Probability: Descriptive statistics, probability, and statistics measurement of kurtosis, dispersion, skewness, and central tendency principles of probability, conditional likelihood, Bayes's law, hazard and dependability, distributions of probabilities, Correlation, models for both single and multiple regression, Testing your hypotheses (t-test, F-test, chi-square test).
Environmental Chemistry
  • Environmental Chemistry Fundamentals: Chemical equations, concentration, and activity; the structure and chemistry of organic molecules; the radioactivity of elements; covalent and ionic bonding; chemical balances; Chemical reaction kinetics and thermodynamics.
  • Water chemistry principles: parameters for measuring water quality; Carbonate system; Buffer solution; Acid-base equilibrium; gas solubility in water; redox reactions, precipitation, and complexation pollutants in water, both organic and inorganic, and how they differ.
  • Organic matter, nitrogen, phosphorus, potassium, cation exchange capacity, base saturation, and sodium absorption ratio are all factors in the chemistry of soil.
  • Chemistry of the Atmosphere: Atmospheric composition; reactivity of trace chemicals in the atmosphere; Smog and particle pollution in urban areas; Chemistry of ozone generation; stratospheric chemistry.
Environmental Microbiology
  • Microorganisms that are prokaryotic and eukaryotic: Characteristics of various microorganism groupings; Microorganism classification; Microbiological diversity; Interactions between plants and microbes in the soil; Microorganisms play an important role in wastewater treatment, bioremediation, and biogeochemical cycling.
  • Cell biology and cell chemistry: Protein, nucleic acid (DNA & RNA), lipid, and carbohydrate structure Biomolecule bonds; Biomolecular stereoisomerism; Cellular structure; The cytoplasmic membrane, cell wall, outer membrane, glycocalyx, chromosomes, endospores, storage products, mitochondria, and chloroplasts all have different structures and functions.
  • Microbiological metabolism: Phosphorylation; Glycolysis; TCA cycle; Electron transport chain; Fermentation; Anaerobic respiration; Energy balances; Enzymes and Enzyme Kinetics.
  • Microorganism growth and control: Bacterial nutrition and growth; specific growth rate and time required for doubling; Monod's model; Culture media types; Batch and continuous culture; Environmental influences on growth; Microbes are controlled utilizing physical and chemical approaches.
  • Microbiology and human health: Pathogens and mechanisms of transmission; indicator organisms; coliform quantification utilizing MPN and membrane filtering techniques.
Water Resources and Hydraulics in the Environment
  • Resources for Water Worldwide: Water structure, qualities, and distribution; Water quality Water resource threats; Conservation of water.
  • Resources for Surface Water: Precipitation, infiltration, evapotranspiration, and runoff are examples of the hydrological cycle and water balance. Flow hydrographs and unit hydrographs are examples of the stage-discharge relationship. Reservoir capacity; canal and reservoir route Models of surface runoff; Management of surface water; collection and storage of rainwater.
  • Resources for groundwater: Aquifers formed by geologic formations; Vadose and saturated zones Aquifers, both confined and unconfined, and their properties (porosity, permeability, transmissivity, and storage coefficient); The law of Darcy and its applications; Well hydraulics in a stable state.
  • Hydraulics of the Environment: Laminar and turbulent flow, buoyancy and flotation, fluid properties, pressure measurement, and mechanical concepts flow via pipes; piping systems; Theory of boundary layers; pressures on submerged bodies; measurement of flow in pipelines and channels; Kinematics of flow; equations for continuity, momentum, and energy; particular energy, critical flow, hydraulic leap, and quick and gradually varying flow in channels; Design of channels with and without linings.
Treatment and Management of Water and Wastewater
  • Parameters governing the quality of water and wastewater; lake eutrophication and thermal stratification; Oxygen sag curve for river contamination.
  • Methods for treating water include filtration, desalination, screening, sedimentation with and without coagulation, and disinfection.
  • wastewater from both point and nonpoint sources; techniques for population predictions; sewage and stormwater sewer design; sewer accessories; sewage treatment at the preliminary, primary, secondary, and tertiary levels; ways for producing, treating, and removing sludge; sewage agriculture.
  • Industrial effluent sources and characteristics; the idea of common effluent treatment plants (CETP); zero liquid discharge and wastewater recycling.
  • Mass and energy balance, reaction order and rate, and reactor design are all aspects of kinetics. Reactor types include batch, fully mixed, and plug flow.
Air and Noise Pollution
  • The composition of the atmosphere; Human and natural sources of pollution; Indoor air pollution; Atmospheric sources, sinks, and transport; effects on the environment and health; gases and particle debris that cause air pollution; air quality requirements; contaminants, both primary and secondary; Standards for ambient and source pollution, visibility, and air quality indexes.
  • Particulate pollutants: measurement and mitigation techniques; Utilising gravitational settling chambers, cyclone separators, wet collectors, fabric filters (Bag-house filter), and electrostatic precipitators (ESP), particle air pollutants are controlled.
  • Methods for measuring and regulating gaseous pollutants; Absorption, adsorption, condensation, and combustion are methods for controlling gaseous pollutants; sulfur oxide, nitrogen oxide, carbon monoxide, and hydrocarbon emissions regulation; Equilibria between vapors of liquid and solid; Diffusion, Fick's law, and mass transfer over interfaces.
  • Catalytic converters, diesel particulate filters, and vehicle emission controls.
  • Management of air quality includes point, line, and area sources, inventory, and the impact of meteorology, including wind rise diagrams, stability, mixing height, terrain, dispersion modeling, and monitoring.
  • Sources, health impacts, standards, measurement techniques, and ways to reduce noise pollution.
Management of Solid and Hazardous Waste
  • Waste hierarchy, integrated solid waste management, and Indian solid waste management laws and regulations.
  • Management of municipal solid waste: sources, generation, properties, transportation, collection, processing, and disposal (including landfilling, biological techniques, and recycling possibilities).
  • Management of hazardous waste: characteristics, production, environmental fate of materials, treatment, and disposal.
  • Contamination of the soil and contamination of the groundwater.
  • Waste management practices, such as storage, collection, and transfer, are used to handle biological waste, plastic garbage, and electronic waste.
Global and Regional Environmental Issues
  • Global implications of air pollution include acid rain, urban heat islands, climate change, greenhouse gases, and the ozone hole.
  • Environmental deterioration, population growth, and the use of energy are all factors that are influenced by ecology and varied ecosystems, biodiversity, and other factors.
Sustainable Development and Environmental Management
  • Environmental Management Systems; the ISO14000 series; environmental audits; and risk assessments for human health and the environment
  • Environmental Law and Policy: Goals; Polluter Pays Principle; Precautionary Principle; The Water and Air Acts with Amendments; The Environment (Protection) Act (EPA) of 1986; The National Green Tribunal Act of 2010; The National Environment Policy; International Law and International Treaties; The Environment (Protection) Act of 1986.
  • Energy and the environment: Overview of energy sources' reserves and resources; Renewable and non-renewable energy sources; the relationship between energy and the environment.
  • Definition and principles of sustainable development; sustainable development objectives; barriers to sustainability; and environmental and economic considerations
General Aptitude
  • Numerical Ability - Numerical estimation; Data interpretation, Numerical computation; Numerical reasoning.
  • Verbal Ability - Verbal analogies, Word groups; Critical reasoning, Verbal deduction, English grammar; Sentence completion, Instructions

GATE 2026 Environmental Science and Engineering: Weightage & Important Topics

This subject was introduced in the GATE syllabus in 2021. The weightage of this GATE 2026 subject is mentioned below: -

GATE 2026 Environmental Science and Engineering Important Topics Topic Weightage
Environmental Microbiology 5
Solid and Hazardous Waste Management 9
Global and Regional Environmental Issues 3
Environmental Management and Sustainable Development 6
Water & Wastewater Treatment and Management 8
Water Resources and Environmental Hydraulics 4
General Aptitude 10
Mathematics Foundation 10
Environmental Chemistry 4
Air and Noise Pollution 6

GATE 2026 Environmental Science and Engineering: Exam Pattern

The GATE 2026 exam pattern is listed below. Candidates should pay close attention to how the GATE 2026 exam format distributes the points.

Particulars Details
Total Marks 100
Total Q1uestions 65

Marking Scheme

MCQ - Negative marking; 1/3 for 1 mark questions, 2/3 for 2 marks questions
NAT/MSQs - No negative marking
Duration 3 hours

Sections

General Aptitude
Subject-based
Exam Mode Online, Computer Based Test (CBT)

Types of Questions

Multiple Choice Questions, MSQs
Numerical Answer Type (NAT) Questions

Marking Scheme

The details of the GATE 2026 Marking scheme are mentioned below: -

Section Marks Marks total Question Types
Math Foundation + Subject Paper (ES) 25 one-mark questions 30 questions for 2 marks each 85 marks MCQs, MSQs, and NATs
General Aptitude five questions worth one mark every 5 questions with a 2 mark each 15 marks MCQs

GATE 2026 Environmental Science and Engineering: Books For Preparation

Candidate’s knowledge of the curriculum will be improved if you use the correct GATE 2026 preparation books. The following list includes the top books for GATE 2026 Environmental Science and Engineering preparation.

Title of the book Name of the Author/ Publication
Wastewater Treatment Technologies: Design Considerations (Challenges in Water Management Series) Mritunjay Chaubey
Air and Noise pollution control Lawrence K Wang
Solid and Hazardous Waste Management M.N Rao
Solid and Hazardous Waste Management S. Bhatia
Environmental Management for Sustainable Development (Routledge Environmental Management Series) Chris Barrow
Assessments of Regional and Global Environmental Risks – Designing Processes for the Effective Use of Science in Decision Making AE Farrell

GATE 2026 Environmental Science and Engineering Syllabus FAQs

Ques. What percentage of the GATE 2026 environmental science and engineering syllabus is there?

Ans. 65 questions totaling 100 points will be on the GATE Environmental Science and Engineering paper. General aptitude will be worth 15 points, the Mathematics Foundation Section will be for 13 points, and the key environmental science and engineering courses will be worth 72 points.

Ques. What is the Scope for GATE 2026 Environmental Science and Engineering?

Ans. They are eligible to apply for jobs as environmental scientists, environmental engineers, environmental biologists, environmental journalists, and many other positions. These jobs have an impact on many different businesses, including those that process food, mine, textile, and dying industries.

Ques. How long does it take to prepare the GATE 2026 Environmental Science and Engineering syllabus?

Ans. Candidates typically need at least 6 months to finish the GATE 2026 Environmental Science and Engineering Syllabus. A candidate may need eight to ten months of preparation to achieve a decent rank that will qualify them for entrance to the best government institutions.

Ques. Is the GATE 2026 Environmental Science and Engineering syllabus challenging or simple?

Ans. Although it is not the simplest of subjects to learn, environmental engineering is typically regarded as being more straightforward than many other engineering specialties because there is less of an emphasis on complex physics and mathematics.

Ques. Is environmental engineering a good field?

Ans. Environmental engineers already significantly contribute to enhancing and saving human lives. As an illustration, they create water management and water waste systems that purify our water and eliminate harmful germs and viruses.

Ques. What is the marking scheme for the GATE 2026 Environmental Science and Engineering examination?

Ans. For MCQ the negative marking is 1/3 for 1 mark questions, 2/3 for 2 marks questions, and for NAT/MSQs there is no negative marking.

*The article might have information for the previous academic years, please refer the official website of the exam.

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