3. Results

Table of results

Table 1 (below)



Types of Water (IV)
Parameters of water quality
Turbidity/NTU
pH/pH Value
Colorimeter/absorbance
Bacteria Count/Number of Colonies
Pond Water Average (before)
6.2
8.44
0.000
TMTC
Pond Water Average (after)
1.2
8.025
0.000
None
Rainwater Average (before)
5.9
8.4
0.000
TMTC
Rainwater Average (after)
2.35
7.935
0.000
None
Tap Water Average
0.45
6.73
0.000
None
*Refer to appendix for raw values


Water Quality standard to meet up to
Parameters of water quality
Turbidity/NTU
pH/pH value
Colorimeter/Absorbance
PUB’s Water Quality
0.19
8.1
0.32
Environmental Public Health (Quality of Piped Drinking Water) Regulations 2008. (updated 1 Nov 2010) - See more at link
5
6.5 - 9.5
11
WHO (World Health Organisation) Water Standard
5
-
11
Table 2 (above)


Bacteria
                   
Above: SST Pond water (set 1) - before and after [left to right]
As seen above, there are many colonies of bacteria in the unfiltered pond water (of set 1) but there are no colonies in the filtered pond water (of set 2).

Above: SST Pond water (set 2) - before and after [left to right]
As seen above, although the unfiltered water of this set (set 2) has lesser colonies compared to the unfiltered water of the previous set (set 1) but the filtered pond water (of set 2) still did not have any bacteria colonies.

Above: Collected Rainwater (set 1) - before and after [left to right]
As seen above, the unfiltered rainwater (set 1) has many colonies, although not as much as the unfiltered pond water has for both set 1 and 2) but the filtered rainwater (of set 1) has no colonies.

     Fig (a)
               
          Fig (b)

Fig (a): Collected Rainwater (set 2) - before and after [left to right]
Fig (b): Organism in the unfiltered rainwater (of set 2)
As seen in Fig (a), the unfiltered rainwater (of set 2) has many colonies and even an organism, as shown in Fig (b), but the filtered rainwater (of set 2) has no colonies.

TW_bacteria_lab&toilet.jpg
Above: SST Tap water - lab & toilet (left to right)
The are no colonies of bacteria thus we can infer that the water has no bacteria.

Data Analysis based on the pictures of the agar plates:
As the pictures show, the water filtered using our straw had no bacteria colonies however, the original water had many colonies.

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