Bangladesh is a developing country with high density of population. But according to UNICEF (1991) about 25% of the population in the developing countries have no access to safe water. Ensuring the safety of drinking water is, therefore, a growing problem. This problem is mostly acute in the south-western part of Bangladesh because of salinity intrusion and arsenic contamination. Notwithstanding microbial dangers, the safety of drinking water in Bangladesh is also threatened by chemical contamination. Shirokhali, a village of Dhoakhali Union at Kachua upazilla, Bagerhat is selected as study area. The inhabitants of this village mainly use RWHs and tubewells water. Very few uses the pond and khal water for drinking purposes. There were 17 samples collected including 1khal, 1 government pond, 1 personal pond, 4 RWHs and 10 tubewells from different locations of the study area. Both Physicochemical analyses including pH, temperature, EC, TDS, salinity, hardness, Turbidity, DO, BOD, Na+, K+, Ca2+, Mg2+, Fe2+, arsenic Cl-, HCO3-, SO42-, PO43-,NO3- etc. and microbial analyses including faecal coliforms, total coliforms and E.coli were performed. The analyses was done by following the standard methods. It is found in the result that, microbial contamination in the water E.coli contamination is low in the tubewells water but high in some RWH systems established there because of low treatment and lack of knowledge. There is also found total coliforms and faecal coliforms in tubewells water which exceeds WHO standards. After the observing the physico-chemical parameter there found high volume of salinity, turbidity and hardness, Cl-, and HCO3-.The result of correlation analysis of the water quality parameters represented that there is no negative relationship. But pH and SO43- has no significant correlation with other parameters.The physicochemical analysis also showed that the collected waters were not suitable for drinking. Arsenic test was done and all the tubewells were free from contamination. But according to the key informant information (DPHE) got that there were arsenic contamination in the area was tested in the year 2003. Proper management and knowledge can be helpful to enrich the existing water quality deterioration. Limitations of the Study:- While conducting this research I have faced some problems which might limit the research result. They are-  There were some problems with flame photometer and spectrophotometer reading. Sometimes the instruments provide unreliable reading. So, there may be some error with the result.  In the case of coliform test, contamination may have occurred for some samples by air.  Time and money are the most valuable limitations for this research. If there is suitable time and money for performing this research this will be a great work for further management.

1. STUDY ON DRINKING WATER QUALITY AT SHIROKHALI
VILLAGE IN KACHUA, BANGLADESH
Sheikh Sifat Islam
Student ID: 151041
Session: 2017-2018
1
Environmental Science Discipline
School of Life Science, Khulna University, Khulna-9208, Bangladesh

2. INTRODUCTION
Background of the Study
Bangladesh is a developing country with high density of population but facing
scarcity of safe drinking water.
Because of threating of arsenic contamination and salinity intrusion this
problem is mostly acute in south western part of Bangladesh.
So, one technology may not be suitable for the larger areas due to different
hydro-geological situation.
This study will help to provide the data of limiting factors causing drinking
water quality deterioration in the study area.
2

3. INTRODUCTION
Justification of the Study
Multiple chemical parameters are measured in drinking water samples
from Shirokhali village of Dhopakhali union under Kachua upazila of
Bagerhat district with the aim of improving public health interventions.
This study will provide some necessary information about the suitability
and working capacity of those systems as well as assures the present
condition of the drinking water quality of that area.
3

4. INTRODUCTION
Objectives of the Study
To find out the physico-chemical and biological state of drinking water at
Shirokhali village of Kachua union.
To determine the parameter responsible for deteriorating the quality of
drinking water.
4

5. MATERIALS AND METHODS
Study area
• Shirokhali village under Dhopakhali union
of Kachua upazilla in Bagerhat district
• Shirokhali is located in between
22°41'06.9”N and 22°42'10.2”N latitudes
and in between 89°51'16.8”E and
89°52'24.4”E longitudes.
5Fig.1: Map of the Study Area

6. MATERIALS AND METHODS
Methodology
Sample Collection
 Experiment
 Data Analysis
 Data Presentation
6

7. RESULTS AND DISCUSSIONS
0
5
10
15
20
25
30
35
Temperature (oC)
temp min max
7
Fig.2: Temperature

8. RESULTS AND DISCUSSIONS
Puissance of Hydrogen pH
RWH water contains low
pH
0
1
2
3
4
5
6
7
8
9
pH
pH min max
8
Fig.3: pH

9. RESULTS AND DISCUSSIONS
0
500
1000
1500
2000
2500
3000
3500
EC (µS)
EC min max
9Fig.4: Electrical Conductivity

10. RESULTS AND DISCUSSIONS
10
0
500
1000
1500
2000
2500
3000
TDS (ppm)
TDS max
Fig.5: Total Dissolve Solids

11. RESULTS AND DISCUSSIONS
11
0
2
4
6
8
10
12
GP 1 K 1 PP 1
DO (ppm)
DO Min
Fig.6: Dissolve Oxygen

12. RESULTS AND DISCUSSIONS
12
0
0.5
1
1.5
2
2.5
GP 1 K 1 PP 1
BOD5 (ppm)
BOD5 max
Fig.7: BOD5

13. RESULTS AND DISCUSSIONS
13
0
5
10
15
20
25
Salinity (ppt)
Salinity Max
Fig.8: Salinity

14. RESULTS AND DISCUSSIONS
• Hardness (mg/L)
14
Hardness (in ppm as
CaCO3)
Water
0-75 Soft
75-150 Moderately Hard
150-300 Hard
Over 300 Very Hard
0
100
200
300
400
500
600
700
800
900
GP1
K1
PP1
RWH1
RWH2
RWH3
RWH4
T01
T02
T03
T04
T05
T06
T07
T08
T09
T10
Hardness (mg/L)
Hardness min max
Fig.9: Hardness

15. RESULTS AND DISCUSSIONS
15
0
50
100
150
200
250
Turbidity (NTU)
Turbidity min max
Fig.10: Turbidity

16. RESULTS AND DISCUSSIONS
16
0
50
100
150
200
250
Na+(mg/L)
Na+(mg/L) max
Fig.11: Sodium

17. RESULTS AND DISCUSSIONS
17
0
20
40
60
80
100
120
140
160
180
200
Ca2+(mg/L)
Ca2+(mg/L) max
Fig.12: Calcium

18. RESULTS AND DISCUSSIONS
18
0
10
20
30
40
50
60
70
80
90
100
Mg2+(mg/L)
Mg2+(mg/L) min max
Fig.13: Magnesium

19. RESULTS AND DISCUSSIONS
19
0
5
10
15
20
25
30
35
K+(mg/L)
K+ max
Fig.14: Potassium

20. RESULTS AND DISCUSSIONS
20
0
0.2
0.4
0.6
0.8
1
1.2
Fe2+ (mg/L)
Fe2+ min max
Fig.15: Iron

21. RESULTS AND DISCUSSIONS
• Arsenic As(mg/L)
21
0
0.01
0.02
0.03
0.04
0.05
0.06
T 01 T 02 T 03 T 04 T 05 T 06 T 07 T 08 T 09 T 10
As (mg/L)
As mg/L As Max
Sample ID mg/L Max
T 01 0 0.05
T 02 0 0.05
T 03 0.01 0.05
T 04 0.01 0.05
T 05 0.01 0.05
T 06 0.025 0.05
T 07 0 0.05
T 08 0.015 0.05
T 09 0.01 0.05
T 10 0 0.05
Fig.16: Arsenic

22. RESULTS AND DISCUSSIONS
22
0
10
20
30
40
50
PO4
3-(mg/L)
PO43- max
Fig.17: Ortho-phosphate

23. RESULTS AND DISCUSSIONS
23
0
100
200
300
400
500
600
700
HCO3
- (mg/L)
Fig.18: Bicarbonate

24. RESULTS AND DISCUSSIONS
24
0
5
10
15
20
25
30
35
40
NO3
- (mg/L)
NO3- max
Fig.19: Nitrate

25. RESULTS AND DISCUSSIONS
• Sulphate SO4
2- (mg/L)
25
0
50
100
150
200
250
300
350
400
450
GP1
K1
PP1
RWH1
RWH2
RWH3
RWH4
T01
T02
T03
T04
T05
T06
T07
T08
T09
T10
SO4
2- (mg/L)
SO42- max
Sample ID SO4
2- (mg/L)
GP 1 5.1517
K 1 15.1366
PP 1 16.3396
RWH 1 0.2866
RWH 2 14.2945
RWH 3 10.5652
RWH 4 11.1667
T 01 9.3622
T 02 9.7231
T 03 15.1366
T 04 0.09412
T 05 6.7156
T 06 10.8058
T 07 4.5502
T 08 0.14224
T 09 7.7983
T 10 13.8133
Fig.20: Sulphate

26. RESULTS AND DISCUSSIONS
26
0
100
200
300
400
500
600
700
Cl- (mg/L)
Cl- (mg/L) min max
Fig.21: Clorine

27. RESULTS AND DISCUSSIONS
27
43200
460
15800
1120 1200 100 32 5 1 17 40 50 21 248 106 259 23
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
GP 1 K 1 PP 1 RWH 1 RWH 2 RWH 3 RWH 4 T 01 T 02
T 03 T 04 T 05 T 06 T 07 T 08 T 09 T 10
Fig.22: Fical Coliforms

28. RESULTS AND DISCUSSIONS
28
68000
53200
170400
94400
104800
1300 47 3 5 6 528 34 41 380 2060 2480 9
0
20000
40000
60000
80000
100000
120000
140000
160000
180000
GP 1 K 1 PP 1 RWH 1 RWH 2 RWH 3 RWH 4 T 01 T 02
T 03 T 04 T 05 T 06 T 07 T 08 T 09 T 10
Fig.23: Total Coliforms

29. RESULTS AND DISCUSSIONS
29
460
350
440
460
50
0 0 0 0 0 0 0 0 2 0 0 0
0
100
200
300
400
500
GP 1 K 1 PP 1 RWH 1 RWH 2 RWH 3 RWH 4 T 01 T 02
T 03 T 04 T 05 T 06 T 07 T 08 T 09 T 10
Fig.24: E.coli

30. CONCLUSION
 Water of this area is not safe for drinking purpose
 Found total coliforms and faecal coliforms in tubewells water
 Regular monitoring needed for arsenic contamination
 Proper management and knowledge can be helpful to enrich the
existing water quality deterioration.
30

31. Thanks to All
31