| 
      
        | Month | Season | Surface water temperature
          (°C) | Surface water salinity 
          (‰) | Surface water pH | DO (ppm) | Total litter
          g/m2/day |  
        | Henry’s Island | Premonsoon | 34.0 | 26.08 | 8.30 | 4.56 | 1.544 |  
        | Monsoon | 32.9 | 10.02 | 8.05 | 5.98 | 1.186 |  
        | Postmonsoon | 29.9 | 20.10 | 8.10 | 5.13 | 1.447 |  
        | Sagar South | Premonsoon | 34.0 | 24.15 | 8.28 | 4.55 | 1.605 |  
        | Monsoon | 32.8 | 9.66 | 8.00 | 4.02 | 1.055 |  
        | Postmonsoon | 29.8 | 18.50 | 8.10 | 4.85 | 1.368 |  
        | Chemaguri | Premonsoon | 33.7 | 21.80 | 8.28 | 5.13 | 1.417 |  
        | Monsoon | 32.5 | 6.59 | 7.99 | 5.81 | 0.996 |  
        | Postmonsoon | 28.0 | 12.48 | 8.04 | 4.93 | 1.370 |  
        | Gosaba | Premonsoon | 33.6 | 22.40 | 8.10 | 4.68 | 1.500 |  
        | Monsoon | 32.6 | 12.68 | 7.95 | 4.93 | 0.905 |  
        | Postmonsoon | 29.6 | 19.59 | 8.00 | 5.01 | 1.050 |  
        | Canning | Premonsoon | 33.8 | 22.01 | 8.10 | 4.85 | 1.200 |  
        | Monsoon | 32.6 | 9.23 | 7.80 | 5.76 | 0.719 |  
        | Postmonsoon | 28.9 | 18.45 | 7.90 | 5.32 | 0.908 |  |