Core Water Quality Monitoring Parameters


S.No.

Parameters

Requirement for Waters of Class

 

 

A-Excellent

B-Desirable

C-Acceptable

(I)

pH

7.0 to 8.5

6.5 to 9.0

6.5 to 9.0

(II)

DO (% Saturation)

90-110

80-120

60-140

(III)

BOD, mg/I

Below 2

Below 3

Below 6

(IV)

EC, umhos/cm

<1000

<2250

<4000

(V)

(NO2+NO3)-Nitrogen, mg/l

<5

<10

<15

(VI)

Suspended solid, mg/l

<25

<50

<100

(VII)

Fecal Coliform, MPN/100 ml

<20 per 100 ml

<200 per 100 ml

<2000 per 100 ml

(VIII)

Bio-assay (Zebra Fish)

No death in 5 days

No death in 3 days

No death in 2 days

 

                          Note :

                          1)  Dissolved Oxygen (DO) not applicable for ground waters.

                  2)    Dissolved oxygen in eutrophicated waters  should include
                     measurement for diurnal variation.

                 3)    Suspended solid limit is applicable only during non-monsoon period.

                 4)    Fecal coliform values should meet for 90% times.
          
5)   Static Bio-Assay method may be adopted.