Question

collect data of major river system in india on the basis of their pollution level
please answer it fast.
No spoiler.....
Its urgent....​

Answer 1

sorry i don't know. .............

Answer 2

$\huge\mathcal\red{ANSWER:-}$

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

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