1. Introduction
    2. How to Prepare Environmental Engg for GATE
    3. Overview of Water Supply Project Design & Construction
    4. Population Forecasting
    5. Sources of Water
    6. Alkalinity of Water
    7. Hardness of Water
    8. Water Quality Index
    9. Quality of Water – Problems Practice
    10. Quality of water Problems 2
    11. Introduction to Water Treatment
    12. Types of Settling
    13. Settling Velocity & Numericals
    14. Softening Techniques
    15. Distribution Reservoir
    16. Introduction to Sewage Treatment
    17. DWF & WWF
    18. Design of Sewers Part 1
    19. Design of Sewers Part 2
    20. BOD Estimation & Problems
    21. BOD Numericals
    22. COD & ThOD
    23. Activated Sludge Process
    24. Activated SLudge Process Part 2
    25. Biological Reactors in STP
    26. Trickling Filters
    27. Trickling Filters Part 2
    28. Sludge Digestion Part 1
    29. Oxidation Ponds Part 1
    30. Oxidation Ponds Part 2
    31. Septic Tanks
    32. Disposal of Effluents Part 1
    33. Disposal of Effluents Part 2
    34. Disposal of Effluents Part 3
    35. Air pollution Part 1
    36. Air pollution Part 2
    37. Air pollution Part 3
    38. Air pollution Part 4
    39. Air pollution Part 5
    40. Air pollution Part 6
    41. Air pollution Part 7
    42. Air pollution Part 8
    43. Air Quality Index
    44. Problem Sloving Session on Air Pollution
    45. Air Pollution Problems Marathon
    46. Ecology
    47. Noise Pollution Part 1
    48. Noise Pollution Part 2
    49. Formula Revision Course
    50. Sewer Appertunances Part 1
    51. Sewer Appertunances Part 2
    52. Sewer Appertunances Part 3
    53. IIT Bombay GATE Problems