Weekly Water Dashboard

732 19 5 0

Overal Water Usage Trend (2010 - Present)

1 400

1 200

1 000

800

600 Water Use (MLD)Use Water

400

200

Dec-11 Dec-13 Dec-16 Dec-18 Nov-21 Dec-12 Dec-14 Dec-15 Dec-17 Dec-19 Nov-20 Nov-22

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 Water Stored in Major Dams (WCWSS)

Overall Percentage Full 100.5% Weekly Change -0.5%

STORAGE MAJOR DAMS (WCWSS) CAPACITY % % % % % % Ml 20 September 2021 Previous week 2020 2019 2018 2017 BERG RIVER 130 010 100.0 100.2 100.3 99.4 100.1 63.1 STEENBRAS LOWER 33 517 99.5 100.9 100.9 98.8 92.6 47.4 STEENBRAS UPPER 31 767 96.8 96.1 99.3 85.3 95.8 99.7 THEEWATERSKLOOF 480 188 100.8 101.7 97.7 72.3 54.9 28.7 VOËLVLEI 164 095 100.9 100.7 96.5 88.6 87.2 26.7 WEMMERSHOEK 58 644 99.7 100.0 96.6 91.3 93.6 44.1 TOTAL STORED 898 221 902 425 906 903 879 917 735 718 653 178 336 864

% STORAGE 100.5% 101.0% 98.0% 81.9% 72.7% 37.5%

WCWSS Storage Record (2008 - Present)

,120

,100

,80

,60

,40 Percentage Full (%) Full Percentage ,20

Feb-08 Feb-10 Feb-12 Feb-14 Feb-21 Feb-23 Feb-09 Feb-11 Feb-13 Feb-15 Feb-16 Feb-17 Feb-18 Feb-19 Feb-20 Feb-22

WCWSS Comparative Storage Graph

1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 0 Volume Stored (million litres) (million Stored Volume 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

2016 2017 2018 2019 2020 2021 WCWSS Dam Storage and Water Use Tracking

900 100%

800 90%

80% 700 70% 600 DANGER ZONE 60% 500 50% CRITICAL ZONE 400

40% (million m³) (million 300 30% EMERGENCY 200 RESPONSE ZONE 20%

Gross storage of major dams dams majorof storage Gross Water difficult to abstract from dams (10%) 100 10%

0 0% (%) dams majorof storage Gross 01-Nov-20 01-Jan-21 01-Mar-21 01-May-21 01-Jul-21 01-Sep-21 01-Nov-21

Actual Dam Levels Projection of storage based on all users using their full alloactions

,400 ,225

,350 ,200

,300 ,175 )

) ,150 3

,250 3 ,125 ,200 ,100 ,150 ,75

,100 m million (million m (million ( ,50 CoCT ,50 ,25 Agriculture

,0 ,0

Cumulative Weekly Usage Weekly Cumulative

02-Jul-21

02-Apr-21 02-Oct-21

02-Jul-21

02-Jan-21 02-Jun-21

02-Feb-21 02-Mar-21

02-Nov-20 02-Dec-20 02-Aug-21 02-Sep-21

02-Apr-21 02-Oct-21

02-May-21

02-Jan-21 02-Jun-21

02-Mar-21

02-Feb-21

02-Nov-20 02-Dec-20 02-Aug-21 02-Sep-21 02-May-21

Target (MCM) Actual (MCM) Planned (MCM) Target (MCM) Cum Actual MCM Planned (MCM)

Water Stored in Minor Dams

Overall Percentage Full 95.8 Weekly Change -1.41

STORAGE MINOR DAMS CAPACITY % % % % % % Ml 20 September 2021 Previous week 2020 2019 2018 2017 ALEXANDRA (Table Mountain) 126 71.9 73.0 99.0 53.2 97.0 82.8 DE VILLIERS (Table Mountain) 243 98.6 100.3 100.0 99.8 100.5 89.4 HELY-HUTCHINSON (Table Mountain) 925 99.3 100.7 100.3 100.3 100.8 100.0 KLEINPLAATS (Simon's Town) 1 368 100.0 100.0 100.0 82.0 99.8 70.2 LAND-EN-ZEEZICHT (Helderberg) 451 100.0 100.0 93.0 83.0 100.0 86.7 LEWIS GAY (Simon's Town) 182 96.7 100.7 93.0 76.4 98.2 90.9 VICTORIA (Table Mountain) 128 100.4 100.4 100.8 100.0 101.9 100.4 WOODHEAD (Table Mountain) 954 91.5 95.3 98.8 83.3 73.8 90.5

Total Stored 4 377 4192.7 4254.5 4272.7 3751.6 4078.1 3721.8 Percentages stored 95.8 97.2 97.6 85.7 93.2 85.0 Rainfall Recorded

Sep RAINFALL (mm) 14-Sep 15-Sep 16-Sep 17-Sep 18-Sep 19-Sep 20-Sep Total* LT Average Blackheath Upper 0.0 0.0 0.0 0.0 0.0 0.6 7.5 43.5 Brooklands 0.0 5.0 0.0 0.0 0.0 4.0 32.0 85.7 Newlands 0.0 0.0 0.0 0.0 0.0 1.5 71.1 168.3 Steenbras 0.0 0.0 0.0 0.0 0.0 6.0 13.5 83.6 Table Mountain (Woodhead) 0.0 0.0 0.0 0.0 2.0 77.0 147.2 Theewaterskloof 0.0 0.0 1.6 0.0 0.0 2.0 5.2 41.1 Tygerberg 0.0 0.0 0.0 0.0 0.0 1.1 5.4 47.0 Voëlvlei 0.0 0.0 0.0 0.0 0.0 0.0 13.3 45.1 Wemmershoek 0.0 0.0 0.0 0.0 0.0 0.5 15.9 90.3 Wynberg 0.0 0.0 0.0 0.0 0.0 0.0 27.7 97.8 Notes: *Total/cummulative rainfall for month indicated above LT: Long Term

Accumulated Monthly Rainfall at Wemmershoek

Note: Wemmershoek station used due to long record and mountainous location

1800.0

1600.0

1400.0

1200.0

1000.0

800.0 Rainfall (mm) Rainfall

600.0

400.0

200.0

0.0 NOV DEC JAN FEB MAR APR MAY JUNE JULY AUG SEPT OCT Drinking Water Quality

SAMPLE PASS RATE

Month Water Quality Compliance (%) Target (%)

Jun-20 99.19 98

Jul-20 99.22 98

Aug-20 99.21 98

Sep-20 99.20 98

Oct-20 99.17 98

Nov-20 99.17 98

Dec-20 99.14 98

Jan-21 99.16 98

Feb-21 99.12 98

Mar-21 99.08 98

Apr-21 99.07 98

May-21 98.98 98

Jun-21 99.11 98

Jul-21 99.10 98

Aug-21 99.12 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.