WEEKLY WATER DASHBOARD
06 July 2020

Headline Statistics
AVERAGE TOTAL
DAILY WATER USE
(MLD)

WEEKLY DAM LEVEL CHANGE
(%)

WCWSS DAM STORAGE
(%)

63.5

670

0.80
Water Production from Different Sources

MAJOR DAMS
(MLD)

MINOR DAMS
(MLD)

GROUND WATER
AND SPRINGS
(MLD)

DESALINATION PLANTS
(MLD)

656

2

5

7

Overal Water Usage Trend (2010 - Present)
1 400

Water Use (MLD)

1 200

1 000

800

600

400

200

WCWSS means Western Cape Water Supply System
MLD means million litres per day
More information on Water Saving and Restrictions is available on the City of Cape Town's 'ThinkWater' website

Nov-21

Nov-20

Dec-19

Dec-18

Dec-17

Dec-16

Dec-15

Dec-14

Dec-13

Dec-12

Dec-11

Dec-10

0

 Water Stored in Major Dams (WCWSS)
Overall Percentage Full

63.5%

Weekly Change

0.8%

STORAGE
MAJOR DAMS (WCWSS)

CAPACITY
Ml
130 010
33 517
31 767
480 188
164 095
58 644
898 221

BERG RIVER
STEENBRAS LOWER
STEENBRAS UPPER
THEEWATERSKLOOF
VOËLVLEI
WEMMERSHOEK
TOTAL STORED

%
82.4
56.6
99.7
59.7
58.9
50.6
570 612

%
Previous week
81.7
51.0
100.7
59.7
56.1
49.6
563 058

%
2019
87.2
50.4
74.2
49.2
63.3
49.7
523 101

%
2018
82.2
55.8
99.1
38.5
49.1
82.7
470 862

%
2017
36.9
28.8
65.6
19.6
20.1
36.1
226 605

%
2016
44.8
41.9
81.2
38.2
34.4
56.8
371 435

63.5%

62.7%

58.2%

52.4%

25.2%

41.4%

06 July 2020

% STORAGE

WCWSS Storage Record (2008 - Present)

Percentage Full (%)

,120
,100
,80
,60
,40
,20

Feb-21

Feb-20

Feb-19

Feb-18

Feb-17

Feb-16

Feb-15

Feb-14

Feb-13

Feb-12

Feb-11

Feb-10

Feb-09

Feb-08

,0

Volume Stored (million litres)

WCWSS Comparative Storage Graph (5 Years)

800000
700000

600000
500000
400000
300000
200000
100000
0

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

41

43

45

47

49

WEEK NO
2015

2016

2017

2018

2019

2020

51

53

 100%

800

90%
80%

700

70%

600
DANGER ZONE

50%

CRITICAL ZONE

400

40%
300

10%
0%

04-Mar-20

04-May-20

04-Jul-20

Actual (MCM)

,50

Agriculture

,25

Target (MCM)

Planned (MCM)

Cum Actual MCM

04-Sep-20

,0

04-Aug-20

04-Oct-20

04-Sep-20

04-Aug-20

04-Jul-20

04-Jun-20

04-May-20

04-Apr-20

04-Mar-20

04-Feb-20

04-Jan-20

04-Dec-19

,0

,75

04-Jul-20

CoCT

,100

04-Jun-20

,100

,125

04-May-20

,150

,150

04-Apr-20

,200

,175

04-Mar-20

,250

,200

04-Feb-20

,300

,225

04-Jan-20

Cumulative Weekly Usage
(million m3)

,350

Target (MCM)

04-Nov-20

Projection of storage based on all users using their full alloactions

,400

,50

04-Sep-20

04-Dec-19

04-Jan-20

Actual Dam Levels

04-Nov-19

20%

Water difficult to abstract from dams (10%)

04-Nov-19

100

30%

EMERGENCY
RESPONSE ZONE

200

0
04-Nov-19

Cumulative Weekly Usage
(million m3)

60%

500

Gross storage of major dams (%)

900

04-Oct-20

Gross storage of major dams
(million m³)

WCWSS Dam Storage and Water Use Tracking

Planned (MCM)

Water Stored in Minor Dams
Overall Percentage Full

74.3

Weekly Change

4.95

STORAGE
MINOR DAMS

CAPACITY

%

%

Ml

06 July 2020

Previous week

%

%

%

%

2019

2018

2017

2016

ALEXANDRA (Table Mountain)

126

59.5

50.8

22.5

95.3

44.2

35.9

DE VILLIERS (Table Mountain)

243

100.5

100.5

95.2

100.2

61.3

99.3

HELY-HUTCHINSON (Table Mountain)

925

91.8

79.4

100.2

100.7

100.0

98.1

1 368

41.8

37.3

46.1

68.7

39.4

50.7

LAND-EN-ZEEZICHT (Helderberg)

451

71.3

70.0

86.5

97.0

66.1

28.8

LEWIS GAY (Simon's Town)

182

65.5

48.2

4.2

100.4

42.5

7.4

VICTORIA (Table Mountain)

128

100.8

102.3

60.7

95.4

101.2

37.9

WOODHEAD (Table Mountain)

954

100.3

100.3

87.9

98.9

85.9

74.8

4 377

3250.0

3033.6

3120.8

3889.9

2979.3

2767.4

74.3

69.3

71.3

88.9

68.1

63.2

KLEINPLAATS (Simon's Town)

Total Stored
Percentages stored

 Rainfall Recorded
RAINFALL (mm)

30-Jun

01-Jul

02-Jul

03-Jul

04-Jul

05-Jul

1.0
0.0
1.0
0.0
0.0
0.0
0.0
6.0
0.0
6.0
0.0
0.0
7.5
0.0
14.0
0.0
0.0
5.5
0.4
1.8
0.0
0.0
0.0
0.0
30.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
1.5
0.0
0.0
0.0
0.2
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
2.0
0.0
2.5
Notes: *Total/cummulative rainfall for month indicated above
LT: Long Term

Blackheath Upper
Brooklands
Newlands
Steenbras
Table Mountain (Woodhead)
Theewaterskloof
Tygerberg
Voëlvlei
Wemmershoek
Wynberg

Jul
Total*
LT Average
1.0
78.8
12.0
132.9
33.5
289.5
7.7
157.8
30.0
244.5
0.0
74.2
1.5
93.3
0.2
101.1
0.0
172.8
6.5
186.4

06-Jul

0.0
0.0
12.0
0.0
0.0
0.0
0.0
0.0
2.0

Accumulated Monthly Rainfall at Wemmershoek
Note: Wemmershoek station used due to long record and mountaneous location

1800.0

1600.0

1400.0

Rainfall (mm)

1200.0

1000.0

800.0

600.0

400.0

200.0

0.0
NOV
-200.0

DEC

JAN

FEB

MAR

APR

MAY

JUNE

JULY

AUG

SEPT

OCT

 Drinking Water Quality
SAMPLE PASS RATE
Month

Water Quality Compliance (%)

Target (%)

Mar-19

99.01

98

Apr-19

99.10

98

May-19

99.08

98

Jun-19

99.09

98

Jul-19

99.04

98

Aug-19

99.02

98

Sep-19

98.99

98

Oct-19

99.03

98

Nov-19

99.14

98

Dec-19

99.09

98

Jan-20

99.07

98

Feb-20

99.08

98

Mar-20

99.17

98

Apr-20

99.16

98

May-20

99.20

98

Notes:
This table shows CCT drinking water quality compliance according to the South African National Standard 241:2015. Compliance, measured
against all prescribed chemical and microbiological components, consistently exceeds the very high CCT target of 98%. (Overall compliance
percentages of continuous sampling and analysis are released on a monthly basis.