Water Quality Monitoring at Kong Yiu Channel From 2013 to 2020


 

Date of sample taken Weather Condition

Chemical Oxygen
Demand (mg/L)

 5-day Biochemical Oxygen Demand (mg/L) Total Suspended Solids (mg/L) Ammonia-
Nitrogen (mg/L)
4/10/2013 Sunny

12

2.5

<3

36
11/10/2013 Sunny

31

6.2

5.7

36
18/10/2013 Cloudy

9

6

<3

8.1
25/10/2013 Sunny

29

8.7

3.9

27
1/11/2013 Sunny

21

7.5

<3

16
8/11/2013 Sunny

27

3.9

3

5.6
15/11/2013 Sunny

14

<2

<3

2.1
22/11/2013 Sunny

    No sample collected due to extremely low water level (1)
29/11/2013 Sunny

16

5.6

6.4

8.6
6/12/2013 Sunny

7

2.2

<3

5.7
13/12/2013 Cloudy

<5

2.1

<3

6.1
20/12/2013 Sunny

<5

<2

<3

2.7
27/12/2013 Sunny

No sample collected due to extremely low water level (1)
3/1/2014 Sunny

No sample collected due to extremely low water level (1)
10/1/2014 Sunny

No sample collected due to extremely low water level (1)
17/1/2014 Sunny

No sample collected due to extremely low water level (1)
24/1/2014 Sunny

No sample collected due to extremely low water level (1)
29/1/2014 Sunny

No sample collected due to extremely low water level (1)
7/2/2014 Sunny

No sample collected due to extremely low water level (1)
14/2/2014 Sunny

No sample collected due to extremely low water level (1)
21/2/2014 Sunny

No sample collected due to extremely low water level (1)
28/2/2014 Cloudy

No sample collected due to extremely low water level (1)
7/3/2014 Cloudy

No sample collected due to extremely low water level (1)
14/3/2014 Cloudy

No sample collected due to extremely low water level (1)
21/3/2014 Cloudy

No sample collected due to extremely low water level (1)
28/3/2014 Cloudy

No sample collected due to extremely low water level (1)
4/4/2014 Cloudy

7

<2

<3

0.41
11/4/2014 Sunny

<5

<2

<3

0.07
17/4/2014 Cloudy

No sample collected due to extremely low water level (1)
25/4/2014 Cloudy

No sample collected due to extremely low water level (1)
2/5/2014 Cloudy

No sample collected due to extremely low water level (1)
9/5/2014 Rainy

No sample collected due to inclement weather (2)
16/5/2014 Cloudy

No sample collected due to extremely low water level (1)
23/5/2014(3) Rainy

50

32

243

4.11
30/5/2014 Sunny

<5

<2

<3

0.17
6/6/2014 Cloudy

7

<2

<3

0.06
13/6/2014 Sunny

<5

<2

<3

0.03
20/6/2014 Sunny

<5

<2

<3

0.08
27/6/2014 Sunny

5

<2

<3

0.22
4/7/2014 Sunny

<5

<2

<3

 0.26
11/7/2014 Cloudy

<5

<2

<3

 0.09
17/7/2014 Cloudy

<5

<2

<3

 0.18
25/7/2014 Cloudy

<5

<2

<3

 0.19
1/8/2014 Sunny

<5

<2

<3

 0.04
8/8/2014 Cloudy

8

<2

<3

 0.22
15/8/2014 Cloudy

<5

<2

<3

 0.24
22/8/2014 Sunny

<5

<2

<3

 0.08
29/8/2014 Sunny

6

<2

<3

 0.15
5/9/2014 Rainy

No sample collected due to inclement weather (2)
12/9/2014 Rainy

No sample collected due to inclement weather (2)
19/9/2014 Sunny

<5

<2

<3

 0.2
26/9/2014 Cloudy

<5

<2

<3

 0.09
3/10/2014 Cloudy

No sample collected due to extremely low water level (1)
10/10/2014 Cloudy

No sample collected due to extremely low water level (1)
17/10/2014 Sunny

No sample collected due to extremely low water level (1)
24/10/2014 Cloudy

No sample collected due to extremely low water level (1)
31/10/2014 Sunny

No sample collected due to extremely low water level (1)
7/11/2014 Cloudy

No sample collected due to extremely low water level (1)
14/11/2014 Cloudy

No sample collected due to extremely low water level (1)
21/11/2014 Sunny

No sample collected due to extremely low water level (1)
28/11/2014 Cloudy

No sample collected due to extremely low water level (1)
5/12/2014 Cloudy

No sample collected due to extremely low water level (1)
12/12/2014 Cloudy

No sample collected due to extremely low water level (1)
19/12/2014 Cloudy

No sample collected due to extremely low water level (1)
24/12/2014 Cloudy

No sample collected due to extremely low water level (1)
2/1/2015 Sunny

No sample collected due to extremely low water level (1)
9/1/2015 Sunny

No sample collected due to extremely low water level (1)
16/1/2015 Sunny

No sample collected due to extremely low water level (1)
23/1/2015 Sunny

No sample collected due to extremely low water level (1)
30/1/2015 Sunny

No sample collected due to extremely low water level (1)
6/2/2015 Cloudy

No sample collected due to extremely low water level (1)
13/2/2015 Sunny

No sample collected due to extremely low water level (1)
23/2/2015 Sunny

No sample collected due to extremely low water level (1)
27/2/2015 Cloudy

No sample collected due to extremely low water level (1)
6/3/2015 Cloudy

No sample collected due to extremely low water level (1)
13/3/2015 Sunny

No sample collected due to extremely low water level (1)
20/3/2015 Sunny

No sample collected due to extremely low water level (1)
27/3/2015 Cloudy

No sample collected due to extremely low water level (1)
2/4/2015 Cloudy

No sample collected due to extremely low water level (1)
10/4/2015 Cloudy

No sample collected due to extremely low water level (1)
17/4/2015 Sunny

No sample collected due to extremely low water level (1)
24/4/2015 Cloudy

No sample collected due to extremely low water level (1)
30/4/2015 Cloudy

No sample collected due to extremely low water level (1)
8/5/2015 Sunny

No sample collected due to extremely low water level (1)
15/5/2015 Sunny

No sample collected due to extremely low water level (1)
22/5/2015 Cloudy

No sample collected due to extremely low water level (1)
29/5/2015 Cloudy

No sample collected due to extremely low water level (1)
5/6/2015 Cloudy

No sample collected due to extremely low water level (1)
12/6/2015 Sunny

No sample collected due to extremely low water level (1)
19/6/2015 Sunny

No sample collected due to extremely low water level (1)
26/6/2015 Cloudy

<5

<2

<3

 <0.2
3/7/2015 Sunny

No sample collected due to extremely low water level (1)
10/7/2015 Cloudy

<5

<2

3.2

<0.2
17/7/2015 Cloudy

No sample collected due to extremely low water level (1)
24/7/2015 Cloudy

No sample collected due to inclement weather (2)
31/7/2015 Sunny

6

<2

5.6

<0.2
7/8/2015 Sunny

No sample collected due to extremely low water level (1)
14/8/2015 Cloudy

<5

<2

<3

 <0.2
21/8/2015 Cloudy

<5

<2

<3

 <0.2
28/8/2015 Cloudy

No sample collected due to extremely low water level (1)
4/9/2015 Sunny

No sample collected due to extremely low water level (1)
11/9/2015 Cloudy

No sample collected due to extremely low water level (1)
18/9/2015 Cloudy

No sample collected due to extremely low water level (1)
25/9/2015 Sunny

No sample collected due to extremely low water level (1)
2/10/2015 Sunny

No sample collected due to extremely low water level (1)
9/10/2015 Sunny

<5

<2

<3

<0.2
16/10/2015 Sunny

No sample collected due to extremely low water level (1)
23/10/2015 Sunny

No sample collected due to extremely low water level (1)
30/10/2015 Sunny

No sample collected due to extremely low water level (1)
6/11/2015 Cloudy

No sample collected due to extremely low water level (1)
13/11/2015 Cloudy

No sample collected due to extremely low water level (1)
20/11/2015 Cloudy

No sample collected due to extremely low water level (1)
27/11/2015 Sunny

No sample collected due to extremely low water level (1)
4/12/2015 Cloudy

No sample collected due to extremely low water level (1)
11/12/2015 Cloudy

No sample collected due to extremely low water level (1)
18/12/2015 Sunny

No sample collected due to extremely low water level (1)
24/12/2015 Cloudy

No sample collected due to extremely low water level (1)
31/12/2015 Cloudy

No sample collected due to extremely low water level (1)
8/1/2016 Sunny

No sample collected due to extremely low water level (1)
15/1/2016 Cloudy

No sample collected due to extremely low water level (1)
22/1/2016 Cloudy

No sample collected due to extremely low water level (1)
29/1/2016 Cloudy

7.0

<2

1.2

 <0.2
5/2/2016 Sunny

No sample collected due to extremely low water level (1)
12/2/2016 Cloudy

No sample collected due to extremely low water level (1)
19/2/2016 Cloudy

15.0

<2

<3

 0.44
26/2/2016 Cloudy

No sample collected due to extremely low water level (1)
4/3/2016 Cloudy

No sample collected due to extremely low water level (1)
11/3/2016 Cloudy

<5

<2

<3

 0.44
18/3/2016 Cloudy

6

<2

<3

 <0.2
24/3/2016 Cloudy

<5

<2

<3

 <0.2
1/4/2016 Cloudy

No sample collected due to extremely low water level (1)
8/4/2016 Cloudy

No sample collected due to extremely low water level (1)
15/4/2016 Cloudy

<5

<2

<3

 <0.2
22/4/2016 Rainy

No sample collected due to inclement weather (2)
29/4/2016 Cloudy

No sample collected due to extremely low water level (1)
6/5/2016 Cloudy

7.0

<2

3.0

 <0.2
13/5/2016 Cloudy

7.0

<2

<3.0

 <0.2
20/5/2016 Cloudy

7.0

<2

<3.0

 <0.2
27/5/2016 Cloudy

<5

<2

<3.0

 <0.2
3/6/2016 Cloudy

6.0

<2

7.4

 <0.2
10/6/2016 Cloudy

2

<2

<2

 0.08
17/6/2016 Cloudy

2

<2

<2

 0.14
24/6/2016 Sunny

No sample collected due to extremely low water level (1)
30/6/2016 Cloudy

<2

<2

<2

 0.05
8/7/2016 Cloudy

3

<2

3

 0.02
15/7/2016 Cloudy

3

<2

<2

 0.07
22/7/2016 Sunny

No sample collected due to extremely low water level (1)
29/7/2016 Sunny

No sample collected due to extremely low water level (1)
5/8/2016 Sunny

4

<2

<2

 0.05
12/8/2016 Cloudy

4

<2

<2

 0.02
19/8/2016 Cloudy

8

<2

<2

 0.07
26/8/2016 Sunny

4

<2

<2

 0.05
2/9/2016 Cloudy

3

<2

<2

 0.05
9/9/2016 Cloudy

<2

<2

<2

 0.09
14/9/2016 Cloudy

3

<2

<2

 0.09
23/9/2016 Cloudy

No sample collected due to extremely low water level (1)
30/9/2016 Cloudy

2

<2

<2

 0.07
7/10/2016 Cloudy

No sample collected due to extremely low water level (1)
14/10/2016 Cloudy

No sample collected due to extremely low water level (1)
28/10/2016 Sunny

No sample collected due to extremely low water level (1)
11/11/2016 Cloudy

<2

<2

<2

 0.02
25/11/2016 Cloudy

No sample collected due to extremely low water level (1)
9/12/2016 Sunny

No sample collected due to extremely low water level (1)
23/12/2016 Cloudy

No sample collected due to extremely low water level (1)
6/1/2017 Sunny

No sample collected due to extremely low water level (1)
20/1/2017 Sunny

No sample collected due to extremely low water level (1)
3/2/2017 Cloudy

No sample collected due to extremely low water level (1)
17/2/2017 Sunny

No sample collected due to extremely low water level (1)
3/3/2017 Cloudy

No sample collected due to extremely low water level (1)
17/3/2017 Cloudy

No sample collected due to extremely low water level (1)
31/3/2017 Rainy

No sample collected due to inclement weather (2)
13/4/2017 Cloudy

3

2

6

 0.06
28/4/2017 Cloudy

No sample collected due to extremely low water level (1)
12/5/2017 Sunny

No sample collected due to extremely low water level (1)
26/5/2017 Cloudy

6

2

3

 0.09
9/6/2017 Sunny

No sample collected due to extremely low water level (1)
23/6/2017 Sunny

4

<2

<2

 0.24
7/7/2017 Cloudy

3

<2

<2

 0.17
21/7/2017 Cloudy

4

<2

<2

 0.06
4/8/2017 Cloudy

<2

<2

<2

 0.02
18/8/2017 Sunny

No sample collected due to extremely low water level (1)
1/9/2017 Cloudy

5

<2

<2

 0.05
15/9/2017 Cloudy

No sample collected due to extremely low water level (1)
29/9/2017 Cloudy

4

<2

<2

 0.04
13/10/2017 Cloudy

No sample collected due to extremely low water level (1)
27/10/2017 Cloudy

No sample collected due to extremely low water level (1)
10/11/2017 Cloudy

No sample collected due to extremely low water level (1)
8/12/2017 Sunny

6

<2

5

 0.06
12/1/2018 Sunny No sample collected due to extremely low water level (1)
9/2/2018 Cloudy No sample collected due to extremely low water level (1)
9/3/2018 Sunny No sample collected due to extremely low water level (1)
13/4/2018 Cloudy No sample collected due to extremely low water level (1)
11/5/2018 Cloudy 17 4 6 0.1
12/6/2018 Cloudy <2 <2 3 0.19
11/7/2018 Sunny <2 <2 <2 0.06
9/8/2018 Sunny <2 <2 <2 0.05
14/9/2018 Sunny 2 <2 <2 0.05
4/12/2018 Sunny No sample collected due to extremely low water level (1)
19/3/2019 Sunny 5 2 6 0.04
6/6/2019 Sunny 2 <2 <2 0.21
13/9/2019 Sunny 4 <2 <2 0.02
3/12/2019 Sunny No sample collected due to extremely low water level (1)
3/3/2020 Sunny No sample collected due to extremely low water level (1)
3/6/2020 Sunny No sample collected due to extremely low water level (1)
2/9/2020 Sunny 2 <2 <2 0.05
9/12/2020 Sunny No sample collected due to extremely low water level (1)
   

 
Legal requirement
( Contractual requirement in parenthesis)
 

80
(30)

20
(-)

30
(20)

5
(0.5) 

Remarks :

  1. Water samples could not be collected due to the extremely low water level in Kong Yiu Channel.
  2. Water samples could not be collected in view of safety concerns arising from inclement weather conditions.
  3. Heavy rainfall (approximately 40mm) and thunderstorm warning were recorded in North District on 23 May 2014. During the sampling time, it was found that the surface water had drained some solid particles into the Kong Yiu Channel. Such solid particles may come from areas outside the landfill. This may affect results of the sample collected on that day.

 

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