Water Quality Parameters Bangladesh Standards & WHO Guide Lines

Sl. No.

Water Quality Parameters

Bangladesh Standards (mg/L)

WHO Guide Line

Methods/ Equipments

01

Aluminum

0.2

-

Atomic Absorption Apectrophotometer (AAS)

02

Ammonia

0.5

 

UV-VIS

03

Arsenic

0.05

0.01

AAS

04

Barium

0.01

0.7

AAS

05

Benzene

0.01

0.01

Gas Chromatograph

06

BOD 5 Day, 200C

0.2

-

5 days Incubation

07

Boron

1.0

-

UV-VIS

08

Cadmium

0.005

0.003

AAS

09

Calcium

75

-

AAS

10

Chloride

150-600

-

Titrimetric

11

Chlorinated Alkenes

 

 

 

11.1

Carbontetrachloride

0.01

0.004

Gas Chromatograph

11.2

1.1 Dichloroethelene

0.001

0.03

Gas Chromatograph

11.3

1.2 Dichloroethelene

0.03

0.03

Gas Chromatograph

11.4

Tetrachloroethelene

0.03

0.04

Gas Chromatograph

11.5

Trichloroethelene

0.09

0.07

Gas Chromatograph

12.1

Pentachlorophrnol

0.03

0.009

Gas Chromatograph

12.2

2,4,6-Trichlorophenol

0.03

0.2

Gas Chromatograph

13

Chlorine (Residual)

0.2

-

Titrimetric

14

Chloroform

0.09

0.2

Gas Chromatograph

15

Chromium (Hexavelent)

0.05

-

Iron Chromatograph

16

Chromium (Total)

0.05

0.05(P)

AAS

17

COD

4

-

Closed Reflux Method

18

Coli form (Faecal)

0 CFU (N/100mL)

0

Membrane Filtration Method

19

Coli form (Total)

0 CFU (N/100mL)

0

Membrane Filtration Method

20

Colour

15 Hazen

-

Colour Comparator

21

Copper

1

2

AAS

22

Cyanide

0.1

0.07

UV-VIS/Specific Ion Electrode

23

Detergent

0.2

-

UV-VIS

24

DO

6

-

Multimeter

25

Electric Conductivity

-us/cm

-

Multimeter

26

Fluoride

1

1.5

UV-VIS

27

Hardness as CaCO3

200-500

-

Titrimetric

28

Iodine

200-500

-

Titrimetric

29

Iron

0.3-1.0

-

AAS

30

Kjelhl Nitrogen (Total)

1

-

UV-VIS/ Digestion

31

Lead

0.05

0.01

AAS

32

Magnesium

30-35

-

AAS

33

Manganese

0.1

-

AAS

34

Mercury

0.001

0.001

Mercury Analyzer

35

Nickel

0.1

0.02(P)

AAS

36

Nitrate

10

50.0 as N

UV-VIS

37

Nitrite

<1

3.0(0.2)

UV-VIS

38

Odour

Odourless

-

Threshold Method

39

ORP (Eh)

-

-

ORP meter

40

Oil and Grease

0.01

-

Oil and Grease meter

41

pH

 

6.5-8.5

pH Meter

42

Phenolic Compounds

0.002

-

Gas Chromatograph

43

Phosphate

6

-

UV-VIS

44

Phosphorus

0

-

Digestion

45

Potassium

12

-

AAS

46

Radioactive Materials (Gross Alpha Activity)

0.01 Bq/L

0.5 Bq/L

-

47

Radioactive Materials (Gross Beta Activity)

0.1 Bq/L

1.0 Bq/L

-

48

Salinity

-%0

-

Multimeter

49

Selenium

0.01

0.01

AAS

50

Silver

0.02

-

AAS

51

Sodium

200

-

AAS

52

Suspended Solids

10

-

Filtration and Drying

53

Sulphide

0

-

UV-VIS

54

Sulphate

400

-

UV-VIS

55

Taste

-

-

Threshold Method

56

Total Alkalinity

-

-

Titrimetric

57

Total Dissolved Solid

1000

-

Multimeter

58

Temperature

20-30C

 

Thermometer

59

Tin

2

-

AAS

60

Turbidity

10 NTU

-

Turbidity meter

61

Zinc

5

-

AAS

Note:  UV-VIS : UV-Visible Spectrophotometer
           AAS : Atomic Absortion Spectrophotometer
           ORP : Oxidation-Reduction Potential

 
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