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Water Quality Monitoring at Kong Yiu Channel

To enhance transparency and address concerns on the water quality impact around the North East New Territories (NENT) Landfill after a leachate leakage incident in July 2013, the Environmental Protection Department (EPD) has arranged to release the water quality monitoring of the Kong Yiu Channel on this website weekly. Pursuant to the contract requirements and in view of the compliance records from the past 4 years, the monitoring frequency of Kong Yiu Channel has changed to biweekly since January 2017, to monthly since November 2017 and to quarterly since September 2018.

The Kong Yiu Channel is not a natural stream. It is a man-made, concrete lined channel, draining into the Shenzhen River. There are a few small farms located along the watercourse and no village houses extract water from the channel for potable use. No species of significant ecological value is recorded along the Kong Yiu Channel. 

 
Location of Water Quality Monitoring Point at Kong Yiu Channel

Location of Water Quality Monitoring Point at Kong Yiu Channel

 

 
The water samples are jointly collected by EPD, the landfill contractor and the independent consultants of the NENT Landfill. The laboratory testing results of the samples taken are generally available in about two weeks’ time.
  

 

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)
3/3/2021 Cloudy No sample collected due to extremely low water level (1)
29/6/2021 Cloudy 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.

The Secretary for the Environment, Mr Wong Kam-sing, and Dean of School of Science & Technology, Professor Ho Kin-chung, inspect Kong Yiu Channel in Ta Kwu Ling on October 4 (Video)

The Secretary for the Environment, Mr Wong Kam-sing, and the Dean of School of Science & Technology, the Open University of Hong Kong, Professor Ho Kin-chung, inspect the Kong Yiu Channel in Ta Kwu Ling on October 4

Secretary for the Environment, Mr Wong Kam-sing, and Dean of School of Science & Technology, Professor Ho Kin-chung, inspect Kong Yiu Channel in Ta Kwu Ling on October 4  Secretary for the Environment, Mr Wong Kam-sing, and Dean of School of Science & Technology, Professor Ho Kin-chung, inspect Kong Yiu Channel in Ta Kwu Ling on October 4  Secretary for the Environment, Mr Wong Kam-sing, and Dean of School of Science & Technology, Professor Ho Kin-chung, inspect Kong Yiu Channel in Ta Kwu Ling on October 4

EPD staff obtains water sample from Kong Yiu Channel in Ta Kwu Ling

EPD staff obtains water sample from Kong Yiu Channel in Ta Kwu Ling
 

Kong Yiu Channel
 
Kong Yiu Channel

 

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User review date: 
Friday, 13 June, 2014