pH,Turbidity & Color test had been conducted here.

1. University of Asia Pacific
1
Nelim Ashfak Bhuiyan -16205075
Department of. Civil and Environmental
Engineering.
Date:30-01-19
Made by:

2. DWASA WATER QUALITY SCENARIO
[A CASE STUDY OF MOHAMMADPUR]
2
Project Topic

3. INTRODUCTION
•Since 1971 Dhaka is growing rapidly in terms of area and
population.
•Population: 60 million in 1971-now more than 164.7 million.
•The trend will continue in future.
•Increasing demands for basic city services -- the most
important one being the demand for safe and reliable water
supply.
•It is a great challenge for DWASA to ensure water of
adequate quantity and quality round the year.
3

4. Project Overview
4

5. 5
Mohammadpur Area
•Mohammadpur had grown as a residential
area subsequently commercial places also
developed.
•Mohammadpur is connected to Sadar Ghat
and Gabtali by the city protection dam.
•Mohammadpur has a population of 316,203.
Mostly middle-class people live here.
•Points of interest:
Residential blocks like Japan Garden City,
Pisciculture Housing Society, Mohammadia
Housing Society, Baitul Aman Housing
Society, Chad Miah Housing, Probal Housing,
Kaderabad Housing.

6. •With the study it can be
suggested that if the supply
system of WASA needs to be
improved or not.
•The quality of the water can be
determined by this study.
•It can be suggested if the
quality of the water either needs
improvement or not.
Importance
of the study
6

7. GROUND WATER QUALITY
IN MOHAMMADPUR
•WASA recently found high concentrations of E. coli in the
ground water of Mohammadpur of Dhaka.
•They have also tested the supply water and found
impurities in one of two samples (WASA, 2003).
•According to a recent study of the WASA, many of the
pumping stations showed both chemical and microbial
contamination of groundwater.
•The identified contaminants were residual chlorine,
coliform and faecal coliform.
7

8. Limitations of
the study
•Mohammadpur is the largest area in Dhaka
City. WASA has its largest supply branch
throughout this area. A lot of WASA pumps
are established here. To select the right
pump for a particular area was a difficult
work to do.
•About 316,203 people lives in the area.
Most of the people are either poor or
middleclass and some of them are not
aware of the water supply they need.
8

9. Collected water from
selected WASA point in PET
bottles then we preserve
them in our laboratory
refrigerator.
+Third
Collected house tap water from
the same WASA source from
connected household.
Collected filter water
from the same house
that is from the WASA.
Water Quality Analysis
9

10. List of conducted tests
pH 01 Turbidity Color02 03
10

11. List of conducted tests in this project
with water quality parameters
•pH is a messure of a solution's
acidity.
•pH is measured on a logarithmic
scale between 1 and 14 with 1
being extremely acid, 7 neutral,
and 14 extremely basic.
•The largest variety of freshwater
aquatic organisms prefer a pH
range between 6.5 to 8.0.
•Turbidity is a measure of the
amount of suspended particles in
the water.
•Algae, suspended sediment, and
organic matter particles can cloud
the water making it more turbid.
•According to Bangladesh
Environment Preservation Act
(1997), drinking water standard for
Turbidity is 10 NTU
(Nephelometric turbidity unit).
•Pure water should not pose any color.
•Color in water may result from the
presence of natural metallic ions (iron
and manganese), humus and peat
materials, plankton, weeds, and
industrial wastes.
•According to Bangladesh
Environment Conservation Rules
(1997), drinking water guideline value
for color is 15 Pt-Co Unit.
pH 01 Turbidity Color02 03
11

12. Sample
WASA
26ᵒc
6.6
TAP
25ᵒc
6.5Filter
25ᵒc
6.24
It can see from the results the pH values are
in the safe range (filter sample was slightly
changed from the limit but filter water
provides a most reliable purification process
with their germ kill kit. A number of people
are using it for secure and safe water.)
pH
12

13. WASA
1 pt /co
unit
TAP
1 pt /co
unitFilter
13 pt
/co unit
•Few deviations from the allowable range
were found.
•Lack of maintenance and the water
sucking range is a big fact for those
problems. Although the quality of WASA
water is far better in those highly
populated areas.
•The sample of house tap water is very
good compare to these tests.
Color
13
Sample

14. Sample
WASA
0.54
FTU
TAP
0.96
FTUFilter
5.16
FTU
Over all the water quality of Mohammadpur
is good with comparing with densely
population and lack of water health
knowledge among the vast people.
Turbidity
14

15. 15
Discussion
The pH average value is 6.45
represents sample water is almost
deionized.
According to Bangladesh Environmental
Preservation Act (1997) drinking water
standard for pH is 6.5 8.5. So the sample
water satisfied thus condition.

16. 16
Discussion
The color of the sample water was
measured 1,1,13 pt/Co unit. Probably
coloring reagents present in the filter
sample water.As it go through some
electric mechanism.
Average value of turbidity is 2.22
FTU. According to Bangladesh
Environment Preservation Act (1997),
drinking water standard for Turbidity
is 10 NTU (Nephelometric turbidity
unit).So it is also in the safe limit.

17. 17
Discussion
Perhaps more tests like iron, arsenic,
hardness, free chlorine must be done to
know the exact knowledge about the
sample wither is it safe to drink or not.

18. 18
Recommendation
•Continuous monitoring facilities should be in place in
the distribution system protect those facilities.
•The authority should also conduct regular monitoring
program to prevent possible contamination of water
along its distribution network by cross connections,
cross contamination by leaking pipes, improper
domestic storage etc.

19. 19
Recommendation
Public awareness can also play an important role to
help prevent such problems.
The situation may aggravate in near future if the
authority does not pay attention and take immediate
actions to restore water quality in the distribution
system.

20. 20
Recommendation
•Continuous monitoring facilities should be in place in
the distribution system protect those facilities.
•The authority should also conduct regular monitoring
program to prevent possible contamination of water
along its distribution network by cross connections,
cross contamination by leaking pipes, improper
domestic storage etc.
•WASA connection has to be monitored carefully.
•Waste dump should be protest.
•Supply line for household purpose should be maintaining high
standard.
•More data collection result should precise the work.

21. 21
•Groundwater extraction in Dhaka is already beyond the sustainable
limit.
•For a sustainable water supply system there should be a balanced
development of surface and groundwater.