Question

collect data on mazor river system in india on their pollution level

Answer 1

The following data may be a bit old... The data may be presented using histograms.
Sabarmati :  4 mg/L  or BOD
BOD :Biochemical Oxygen Demand.
In 2010 the statistics are:
Markanda:   590 mg Oxygen /liter    BOD
Amlakhadi :  353 
Kali:  364
Yamuna canal:  247  BOD 
Yamuna  near Delhi:  70
Betwa:   58
The above are the worst affected.  Near cities and major towns the rivers are badly affected.  In rural areas they are better.
BOD levels of 8 mg/L  or less is acceptable... below 2 mg/L is 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 : 
2 mg/L  in some areas.   
in cities and towns,  about 13 mg/L   BOD
Narmada  : less than 2.5 mg/L  BOD
Mahanadi  :   less than  1 mg O / Litre   to   4  in cities or chattisgarh
Krishna:  
1 to 3   in many areas...   
10 in many cities/towns....    
Around Pune 28 mg/L
Cauvery : generally from 1 mg/L  to  3 mg/L
Ganga :  4 - 8  mg / liter  BOD
Godavari :  5 BOD
Vitharini (Bitarni) :  2 mg/l
Narmada : 2 mg/l
Mahi : 2.5 mg//l

Answer 2

Sabarmati : 4 mg/L or BOD BOD : biochemical oxygen demand. In 2010 the statistics are: Markanda: 590 mg Oxygen /liter BOD Amlakhadi : 353 Kali: 364 Yamuna canal: 247 BOD Yamuna near Delhi: 70 Betwa: 58 The above are the worst affected. Near cities and major towns the rivers are badly affected. In rural areas they are better. BOD levels of 8 mg/L or less is acceptable... below 2 mg/L is 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 2 mg/L in some areas. in cities and towns, about 13 mg/L BOD Narmada : less than 2.5 mg/L BOD Mahanadi : less than 1 mg O / Litre to 4 in cities or chattisgarh Krishna: 1 to 3 in many areas... 10 in many cities/towns.... Around Pune: 28 mg/L Cauvery : generally from 1 mg/L to 3 mg/L Ganga : 4 - 8 mg / liter BOD Godavari : 5 BOD Vitharini (Bitarni) : 2 mg/l Narmada : 2 mg/l Mahi : 2.5 mg//l