Collect data of major river system in india on the basis of their pollution level. represent the data by using different statistical tools.

Her is the data of major river system in India on the basis of their pollution level:
Sabarmati : 
                  Around 4 mg/L
On the basis of the statistics taken in 2010 are:

Markanda: 590 mg Oxygen /liter
Amlakhadi: 353 mg Oxygen /liter

Kali:  364 mg Oxygen /liter

Yamuna canal:  247 mg Oxygen /liter

The Yamuna  near Delhi:  70 mg Oxygen /liter

Betwa:   58 mg Oxygen /liter

The levels of 8 mg/L  or less is acceptable and below 2 mg/L is also considered as a good water.           
 

Ganga :   
            At Rishikesh: 1.5  mg  Oxygen/L.                   
            At Kanpur: 5 mg/L

Brahmaputra:   
                      At Gauhati  - very high.     
                     At other locations: 2 mg /L  or less

Tapi:
       In certain areas: 2 mg/L .   
       In cities and towns: 13 mg/L

Narmada:
               Less than 2.5 mg/L

Mahanadi: 
                Less than  1 mg Oxygen / Litre to 4 mg Oxygen / Litre  in cities or                        Chattisgarh
Krishna:   
             1 mg Oxygen / Litre to 3 mg Oxygen / Litre             10 mg Oxygen / Litre in certain cities/towns.    
Pune:
         Around 28 mg/L

Cauvery :
             From 1 mg/L  to  3 mg/L
Ganga : 
            From 4 mg/l to 8  mg/l
Godavari : 
                Around 5 mg/l

Vitharini (Bitarni) : 
                             Around 2 mg/l

Narmada :
                 Around 2 mg/l
Mahi :
         Around 2.5 mg//l