Water Quality Parameters

Water Quality Parameters of Bangladeshi Standards and WHO

Sl.No.	Water Quality Parameters	Bangladeshi Standards (mg/L)	Who Guide Line	Methods/Equipments
1	Aluminium	0.2	-	Atomic Absoption Spectrosphotometer (AAS)
2	Ammonia	0.5		UV-VIS
3	Arsenic	0.05	0.01	AAS
4	Barium	0.01	0.7	AAS
5	Benzene	0.01	0.01	Gas Chromatograph
6	BOD 5 Days,20°C	0.2	-	5 days Incubation
7	Boron	1.0	-	UV-VIS
8	Cadmium	0.005	0.003	AAS
9	Calcium	75		AAS
10	Chloride	150-600	-	Titrimetric
11	Chlorinated Alkenes
11.1	Carbontetrachloride	0.01	0.004	Gas Chromatograph
11.2	1,1 Dichloroethene	0.001	0.03	Gas Chromatograph
11.3	1,2 Dichloroethene	0.03	0.03	Gas Chromatograph
11.4	Tetrachloroethene	0.03	0.04	Gas Chromatograph
11.5	Trichloroethene	0.09	0.07	Gas Chromatograph
12.1	pentachloroethene	0.03	0.009	Gas Chromatograph
12.2	2,4,6-Trichlorophenol	0.03	0.2	Gas Chromatograph
13	Chlorine (Residual)	0.2	-	Tirimertic
14	Chloroform	0.09	0.2	Gas Chromatograph
15	Hexa Valent	0.05	-	Ion Chromatograph
16	Chromium (Total)	0.05	0.05 (P)	AAS
17	COD	4	-	Closed Reflux Method
18	Coli form (Fecal)	o cfu (N/100 mL)	0	Membrane Filtration Method
19	Coli form (Total)	o cfu (N/100 mL)	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	Flouride	1	1.5	UV-VIS
27	Hardness S CaCo3	200-500	-	Tirimertic
28	Iodine	200-500	-	Tirimertic
29	Iron	0.3-1.0	-	AAS
30	Kjelhl Nirogen (Total)	1	-	UV-VIS/Digestion
31	Lead	0.05	0.01	AAS
32	Mahnesium	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	Less than 1	3.0 (0.20)	UV-VIS
38	Odour	Odourless	-	Threshold Method
39	PH	6.4-7.4	6.5-8.5	PH Meter

Source: Bangladeshi Standards and WHO Standards

pic: Water quality parameters check