City of : Water Dashboard

05 February 2018

AVG DAILY PRODUCTION DAM STORAGE (%) WEEKLY DAM LEVEL CHANGE AVG DAILY PRODUCTION WCWSS LARGE DAMS ONLY (%) ALL WATER SOURCES (Ml/d) (Ml/d)

25.5 -0.8 547 526

decrease since last week (Target 450Ml/d)

Water Usage From Large Dams Comprising The Water Supply System (WCWSS)

Cumulative Weekly CCT Usage (Excl. Own Sources) Cumulative Weekly Agricultural Usage from from WCWSS vs. Planned Usage WCWSS vs. Planned Usage

325 325 Prior Unrestricted 5 yr Average 300 300 Prior Unrestricted 5 yr Average Planned CCT Usage 275 275 Planned Agricultural Usage Actual CCT Usage 250 250 Actual Agricultural Usage Target Usage by 31 October 2018 225 225 Target Usage by 30 April 2018 200 200 Usage Target:174.7 million 175 175 150 150 125 125 100 100 75 75 Usage Target: 58.2 million m3

50 50 Cumulative Agric Usage (million (million Agric m³)UsageCumulative Cumulative CCT Usage (million m³) (million CCT UsageCumulative 25 25 0 0

End of Week End of Week

Western Cape Water Supply System (WCWSS) Weekly Dam Drawdown Tracker

Disclaimer: The data depicted above is indicative and has been based on the City's own assessment of water use from the WCWSS. It is subject to official verification by the National Department of Water and Sanitation. Water Stored in Major Dams Comprising Western Cape Water Supply System (WCWSS)

STORAGE MAJOR DAMS CAPACITY % % % % % % Ml 05 February 2018 Previous week 2017 2016 2015 2014 BERG RIVER 130 010 53.5 53.7 47.4 46.8 76.7 97.1 STEENBRAS LOWER 33 517 44.2 43.8 44.5 46.6 56.0 74.3 STEENBRAS UPPER 31 767 82.2 85.7 57.0 75.6 91.0 99.6 THEEWATERSKLOOF 480 188 12.5 13.3 33.2 48.8 75.2 87.7 VOËLVLEI 164 095 17.6 18.1 40.1 24.8 70.1 81.2 WEMMERSHOEK 58 644 50.7 52.4 36.5 55.2 69.2 82.1 TOTAL STORED 898 221 229 126 236 111 341 393 407 895 663 978 785 222 % STORAGE 25.5 26.3 38.0 45.4 73.9 87.4

NOTES: 1) Capacity of the major dams of the Western Cape Water Supply System is 99.6% and that of the minor dams 0.4% of the combined capacity of the major and minor dams. Kindly note that all the Major Dams show gross capacity.

2) All figures are for 05 February for each year except for those in the second column, which gives the figures for the previous week of this year.

3) The last 10% of a dam's water is difficult to use, the useable water in the dam is approximately 10% less than the dam level.

120 Dam Levels for 05 February 2014-2018 100

80

60

40

20

0 2014 2015 2016 2017 Previous week 05 February 2018

BERG RIVER STEENBRAS LOWER STEENBRAS UPPER THEEWATERSKLOOF VOËLVLEI WEMMERSHOEK Water Stored in Minor Dams Within Cape Town

STORAGE MINOR DAMS CAPACITY % % % % % % Ml 05 February 2018 Previous week 2017 2016 2015 2014 ALEXANDRA () 126 39.1 40.9 32.4 46.5 35.0 58.6 DE VILLIERS (Table Mountain) 243 78.4 79.3 62.4 71.3 55.2 96.0 HELY-HUTCHINSON (Table Mountain) 925 97.5 97.8 97.6 89.1 26.6 98.1 KLEINPLAATS (Simon's Town) 1 368 48.1 49.0 54.2 48.5 33.6 78.8 LAND-EN-ZEEZICHT () 451 96.3 97.3 85.7 20.3 LEWIS GAY (Simon's Town) 182 93.0 92.1 59.1 35.5 77.7 64.5 VICTORIA (Table Mountain) 128 86.8 88.9 86.1 55.4 79.9 88.2 WOODHEAD (Table Mountain) 954 94.0 94.3 98.6 62.8 72.4 69.3

Ten Year Graph Indicating Volume of Water Stored in Major Dams Comprising Western Cape Water Supply System (WCWSS)

1000000

900000 800000 700000 600000 500000 400000 300000 200000

100000 VOLUME STORED IN MEGALITRES IN STORED VOLUME 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 51 53

WEEK NO 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Percentage Water Stored in Major Dams (WCWSS)

120.00 100.00

80.00 60.00 40.00

20.00 % Storage%

-

05-Oct-13 05-Oct-14 05-Oct-15 05-Oct-16 05-Oct-17

05-Apr-14 05-Apr-15 05-Apr-16 05-Apr-17

05-Jun-14 05-Jun-15 05-Jun-16 05-Jun-17

05-Feb-14 05-Feb-15 05-Feb-16 05-Feb-17 05-Feb-18

05-Dec-14 05-Dec-16 05-Dec-13 05-Aug-14 05-Aug-15 05-Dec-15 05-Aug-16 05-Aug-17 05-Dec-17

TOTAL STORED - BIG 6 Date CCT Daily Average Water Production (7 Day Avg)

1 400

1 200

1 000

800

600

Production(Ml/day) 400

200

0

25-Jul-13 20-Jul-14 15-Jul-15 09-Jul-16 04-Jul-17

05-Jan-17 21-Jan-14 16-Jan-15 11-Jan-16

22-Mar-14 17-Mar-15 11-Mar-16 06-Mar-17

07-Sep-16 23-Sep-13 22-Nov-13 18-Sep-14 17-Nov-14 13-Sep-15 12-Nov-15 06-Nov-16 02-Sep-17 01-Nov-17 31-Dec-17

21-May-14 16-May-15 10-May-16 05-May-17

Date

Average Production (Ml/day)

CCT Water Quality Sample Pass Rate

Month Water Quality Compliance (%) Target (%) Nov-16 99.59 98 Dec-16 99.65 98 Jan-17 99.63 98 Feb-17 99.64 98 Mar-17 99.67 98 Apr-17 99.67 98 May-17 99.71 98 Jun-17 99.65 98 Jul-17 99.62 98 Aug-17 99.59 98 Sep-17 99.57 98 Oct-17 99.49 98 Nov-17 99.44 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. The latest available is for November.)

Rainfall

Feb RAINFALL (mm) 29-Jan 30-Jan 31-Jan 01-Feb 02-Feb 03-Feb 04-Feb Total* LT Average Blackheath Upper 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.4 14.1 Brooklands 0.0 0.0 0.0 3.0 0.0 0.0 0.0 3.0 22.5 Newlands 0.0 0.0 0.0 0.0 1.5 0.0 0.0 1.5 43.8 Steenbras 0.0 0.0 0.0 0.0 0.5 0.0 0.0 0.5 24.5 Table Mountain (Woodhead) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 56.9 Theewaterskloof 0.0 3.1 0.0 0.0 0.0 0.0 0.0 0.0 21.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.7 Voëlvlei 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.3 Wemmershoek 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14.3 Wynberg 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22.2

Notes: *Total/cumulative rainfall for month indicated above LT: Long Term