APPENDIX C

CCT WWTW Current and Projected Return Flows

ORGANIC LOAD HANDLED BY ALL TREATMENT WORKS 550,000 5,000,000

y = 2,633x + 865,962 525,000 4,750,000

500,000

4,500,000

475,000

4,250,000 450,000

425,000 4,000,000

400,000 3,750,000 population equivalents Kg Chem Ox Demand / day 375,000

3,500,000

350,000

3,250,000 325,000 RATE OF GROWTH = 3.3% pa

300,000 3,000,000

Jul-97Oct-97Jan-98Apr-98Jul-98Oct-98Jan-99Apr-99Jul-99Oct-99Jan-00Apr-00Jul-00Oct-00Jan-01Apr-01Jul-01Oct-01Jan-02Apr-02Jul-02Oct-02Jan-03Apr-03Jul-03Oct-03Jan-04Apr-04Jul-04Oct-04Jan-05Apr-05Jul-05 TOTAL FOR ALL WORKS

ALL WORKS: FLOW 850 800 750 700 650 y = 0.1084x + 404.54 600 550 500 450 y = 0.2167x + 233.46

Ml/d 400 350 300 250 200 150 ANNUAL RATE OF GROWTH: 100 total flow = 0.7% 50 dry weather flow = 0.7% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

ALL WORKS: ORGANIC LOAD 6,000,000

5,500,000

5,000,000

4,500,000

4,000,000

3,500,000 y = 2,633x + 865,962 3,000,000

2,500,000

2,000,000

Population Equivalents 1,500,000 ANNUAL RATE OF GROWTH: total load = 3.6% 1,000,000

500,000

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) ATHLONE WASTEWATER TREATMENT WORKS

ATHLONE WWTW: FLOW 180 Flow bypassed to 160

140 y = 0.1514x - 103.09

120

100 Ml/d 80 y = 0.1909x - 162.08

60

40 ANNUAL RATE OF GROWTH: 20 total flow = 4.2% dry weather flow = 5.6% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily flow Dry weather flow Hyd Cap CWC proj.1 Linear (Dry weather flow) Linear (Daily flow)

ATHLONE WWTW: ORGANIC LOAD

1,500,000 Flow bypassed to 1,350,000 Cape Flats y = 827x - 374,961 1,200,000

1,050,000

900,000

750,000

600,000

450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: 150,000 total load = 3.1%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019

design organic load Population Equivalents Linear (Population Equivalents) BELLVILLE WASTEWATER TREATMENT WORKS

BELLVILLE WWTW: FLOW 90

80

70

60

50 25 Ml/d extension to Ml/d 40 handle flow from Bottelary Area 30 Some flow diverted to in this 20 period

10

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Ml/d Rated Hyd Cap Linear (Ml/d)

BELLVILLE WWTW: ORGANIC LOAD

850,000 800,000 PST's added 750,000 700,000 650,000 600,000 550,000 500,000 450,000 400,000 350,000 300,000 250,000

Population Equivalents 200,000 150,000 100,000 ANNUAL RATE OF GROWTH: total load = 3.3% 50,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Design Organic Load Population Equivalents Linear (Population Equivalents)

66 BORCHERDS QUARRY WASTEWATER TREATMENT WORKS

BORCHERDS QUARRY WWTW: FLOW 40 y = 0.0733x - 62.292

35 y = 0.0741x - 63.416

30

25

20 Ml/d

15

10 ANNUAL RATE OF GROWTH: total flow = 3.1% 5 dry weather flow = 2.6%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

BORCHERDS QUARRY WWTW: ORGANIC LOAD y = 630x - 457,747

450,000

400,000

350,000

300,000

250,000

200,000

150,000

Population Equivalents 100,000

50,000 ANNUAL RATE OF GROWTH: total load = 1.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Design Organic Load Population Equivalents Linear (Population Equivalents) SEA OUTFALL

CAMPS BAY: FLOW

4.0

3.5

3.0 y = 0.0004x + 1.6452 2.5

2.0

Ml/d y = 0.0007x + 1.1883

1.5

1.0

0.5 ANNUAL RATE OF GROWTH: total flow = 0.8% dry weather flow = 1.4% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

CAMPS BAY: ORGANIC LOAD 25,000 y = 43.028x - 38026 22,500

20,000

17,500

15,000

12,500

10,000

7,500 Population Equivalents 5,000

2,500 ANNUAL RATE OF GROWTH: total load = 3.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents Linear (Population Equivalents) CAPE FLATS WASTEWATER TREATMENT WORKS

CAPE FLATS WWTW: FLOW 275

y = -0.1687x + 355.84 250

225

200

175

150

Ml/d 125 y = -0.2791x + 476.66 100

75

50 ANNUAL RATE OF GROWTH: total flow = -1.1% dry weather flow = -2.3% 25

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

CAPE FLATS WWTW: ORGANIC LOAD 1,800,000

1,650,000 y = 1,674x - 1,006,587 1,500,000

1,350,000

1,200,000

1,050,000

900,000

750,000

600,000

450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: total load = 2.6% 150,000

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) ORGANIC LOAD HANDLED BY ALL TREATMENT WORKS 550,000 5,000,000

y = 2,633x + 865,962 525,000 4,750,000

500,000

4,500,000

475,000

4,250,000 450,000

425,000 4,000,000

400,000 3,750,000 population equivalents Kg Chem Ox Demand / day 375,000

3,500,000

350,000

3,250,000 325,000 RATE OF GROWTH = 3.3% pa

300,000 3,000,000

Jul-97Oct-97Jan-98Apr-98Jul-98Oct-98Jan-99Apr-99Jul-99Oct-99Jan-00Apr-00Jul-00Oct-00Jan-01Apr-01Jul-01Oct-01Jan-02Apr-02Jul-02Oct-02Jan-03Apr-03Jul-03Oct-03Jan-04Apr-04Jul-04Oct-04Jan-05Apr-05Jul-05 TOTAL FOR ALL WORKS

ALL WORKS: FLOW 850 800 750 700 650 y = 0.1084x + 404.54 600 550 500 450 y = 0.2167x + 233.46

Ml/d 400 350 300 250 200 150 ANNUAL RATE OF GROWTH: 100 total flow = 0.7% 50 dry weather flow = 0.7% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

ALL WORKS: ORGANIC LOAD 6,000,000

5,500,000

5,000,000

4,500,000

4,000,000

3,500,000 y = 2,633x + 865,962 3,000,000

2,500,000

2,000,000

Population Equivalents 1,500,000 ANNUAL RATE OF GROWTH: total load = 3.6% 1,000,000

500,000

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) ATHLONE WASTEWATER TREATMENT WORKS

ATHLONE WWTW: FLOW 180 Flow bypassed to Cape Flats 160

140 y = 0.1514x - 103.09

120

100 Ml/d 80 y = 0.1909x - 162.08

60

40 ANNUAL RATE OF GROWTH: 20 total flow = 4.2% dry weather flow = 5.6% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily flow Dry weather flow Hyd Cap CWC proj.1 Linear (Dry weather flow) Linear (Daily flow)

ATHLONE WWTW: ORGANIC LOAD

1,500,000 Flow bypassed to 1,350,000 Cape Flats y = 827x - 374,961 1,200,000

1,050,000

900,000

750,000

600,000

450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: 150,000 total load = 3.1%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019

design organic load Population Equivalents Linear (Population Equivalents) BELLVILLE WASTEWATER TREATMENT WORKS

BELLVILLE WWTW: FLOW 90

80

70

60

50 25 Ml/d extension to Ml/d 40 handle flow from Bottelary Area 30 Some flow diverted to Kraaifontein in this 20 period

10

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Ml/d Rated Hyd Cap Linear (Ml/d)

BELLVILLE WWTW: ORGANIC LOAD

850,000 800,000 PST's added 750,000 700,000 650,000 600,000 550,000 500,000 450,000 400,000 350,000 300,000 250,000

Population Equivalents 200,000 150,000 100,000 ANNUAL RATE OF GROWTH: total load = 3.3% 50,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Design Organic Load Population Equivalents Linear (Population Equivalents)

66 BORCHERDS QUARRY WASTEWATER TREATMENT WORKS

BORCHERDS QUARRY WWTW: FLOW 40 y = 0.0733x - 62.292

35 y = 0.0741x - 63.416

30

25

20 Ml/d

15

10 ANNUAL RATE OF GROWTH: total flow = 3.1% 5 dry weather flow = 2.6%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

BORCHERDS QUARRY WWTW: ORGANIC LOAD y = 630x - 457,747

450,000

400,000

350,000

300,000

250,000

200,000

150,000

Population Equivalents 100,000

50,000 ANNUAL RATE OF GROWTH: total load = 1.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Design Organic Load Population Equivalents Linear (Population Equivalents) CAMPS BAY SEA OUTFALL

CAMPS BAY: FLOW

4.0

3.5

3.0 y = 0.0004x + 1.6452 2.5

2.0

Ml/d y = 0.0007x + 1.1883

1.5

1.0

0.5 ANNUAL RATE OF GROWTH: total flow = 0.8% dry weather flow = 1.4% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

CAMPS BAY: ORGANIC LOAD 25,000 y = 43.028x - 38026 22,500

20,000

17,500

15,000

12,500

10,000

7,500 Population Equivalents 5,000

2,500 ANNUAL RATE OF GROWTH: total load = 3.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents Linear (Population Equivalents) CAPE FLATS WASTEWATER TREATMENT WORKS

CAPE FLATS WWTW: FLOW 275

y = -0.1687x + 355.84 250

225

200

175

150

Ml/d 125 y = -0.2791x + 476.66 100

75

50 ANNUAL RATE OF GROWTH: total flow = -1.1% dry weather flow = -2.3% 25

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

CAPE FLATS WWTW: ORGANIC LOAD 1,800,000

1,650,000 y = 1,674x - 1,006,587 1,500,000

1,350,000

1,200,000

1,050,000

900,000

750,000

600,000

450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: total load = 2.6% 150,000

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) GORDONS BAY WASTEWATER TREATMENT WORKS

GORDON'S BAY WWTW: FLOW 9

8

7

6 y = 0.0101x - 9.9521

5

Ml/d 4

3 y = 0.0077x - 7.2896

2 ANNUAL RATE OF GROWTH: 1 total flow = 7.5% dry weather flow = 6.3%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

GORDON'S BAY WWTW: ORGANIC LOAD 40,000

35,000 y = 81.307x - 86887

30,000

25,000

20,000

15,000 Population Equivalents 10,000

ANNUAL RATE OF GROWTH: 5,000 total load = 11.5%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents Design Organic Load Linear (Population Equivalents) GREEN POINT SEA OUTFALL: FLOW & LOAD

GREEN POINT: FLOW 35 y = -0.0041x + 31.221

30

25

y = -0.0041x + 29.982 20 Ml/d 15

10

5 ANNUAL RATE OF GROWTH: total flow = -0.2% dry weather flow = -0.7% 0

Jul-1997Jul-1998Jul-1999Jul-2000Jul-2001Jul-2002Jul-2003Jul-2004Jul-2005Jul-2006Jul-2007Jul-2008Jul-2009Jul-2010Jul-2011Jul-2012Jul-2013Jul-2014Jul-2015Jul-2016Jul-2017Jul-2018Jul-2019Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

GREEN POINT: ORGANIC LOAD

275,000 y = 197.24x - 81012

250,000

225,000

200,000

175,000

150,000

125,000

100,000

75,000 Population Equivalents 50,000

25,000 ANNUAL RATE OF GROWTH: total load = 1.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents Linear (Population Equivalents) SEA OUTFALL

HOUT BAY: FLOW 10

9

8

7

6

5 Ml/d 4 y = -0.0072x + 12.851 3

2 ANNUAL RATE OF GROWTH: y = -0.0129x + 19.732 1 total flow = -1.0% dry weather flow = -2.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

HOUT BAY: ORGANIC LOAD 100,000

90,000

80,000 y = -16.657x + 53833 70,000

60,000

50,000

40,000

30,000 Population Equivalents 20,000 ANNUAL RATE OF GROWTH: 10,000 total load = 2.0%

0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020

Population Equivalents design organic load Linear (Population Equivalents) KRAAIFONTEIN WASTEWATER TREATMENT WORKS

KRAAIFONTEIN WWTW: FLOW

18

16 y = 0.0466x - 50.034

14

12

10 y = 0.0442x - 47.708

Ml/d 8

6

4 ANNUAL RATE OF GROWTH: total flow = 9.4% 2 dry weather flow = 9.3%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Daily Flow Dry weather flow Design ADWF CWC estimate Linear (Dry weather flow) Linear (Daily Flow)

KRAAIFONTEIN WWTW: ORGANIC LOAD 170,000 160,000 150,000 140,000 130,000 y = 358.85x - 390135 120,000 110,000 100,000 90,000 80,000 70,000 60,000 Population Equivalents 50,000 40,000 30,000 ANNUAL RATE OF GROWTH: 20,000 total load = 10.1% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) LLANDUDNO WASTEWATER TREATMENT WORKS

LLANDUDNO WWTW: FLOW 0.60

0.55

0.50

0.45

0.40

0.35 y = 0.0003x - 0.1929 0.30

ML/d 0.25 y = 0.0002x - 0.0924 0.20

0.15

0.10 ANNUAL RATE OF GROWTH: 0.05 total flow = 3.0% dry weather flow = 4.1% 0.00 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

LLANDUDNO WWTW: ORGANIC LOAD 3,200

2,800

2,400

y = 1.1204x - 182.85 2,000

1,600

1,200

800 Population Equivalents

400 ANNUAL RATE OF GROWTH: total load = 2.0% 0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020

Population Equivalents design organic load Linear (Population Equivalents) MACASSAR WASTEWATER TREATMENT WORKS

MACASSAR WWTW: FLOW 80.0 75.0 20Ml/d extension 70.0 2 addn. SST's commissioned commissioned 65.0 y = 0.1219x - 112.75 60.0 55.0 50.0 y = 0.1131x - 104.77 45.0 40.0

Ml/d 35.0 30.0 25.0 20.0 15.0 ANNUAL RATE OF GROWTH: 10.0 total flow = 5.4% 5.0 dry weather flow = 6.0% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

MACASSAR WWTW: ORGANIC LOAD 550,000

500,000 y = 798.2x - 783937

450,000

400,000

350,000

300,000

250,000

200,000

150,000 Population Equivalents 100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 6.5%

0 Jul-97 Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-04 Jul-05 Jul-06 Jul-07 Jul-08 Jul-09 Jul-10 Jul-11 Jul-12 Jul-13 Jul-14 Jul-15 Jul-16 Jul-17 Jul-18 Jul-19 Jul-20

Population Equivalents Design Organic Load Linear (Population Equivalents) WASTEWATER TREATMENT WORKS

MELKBOSSTRAND WWTW: FLOW 27

24 ANNUAL RATE OF GROWTH: total flow = 8.7% 21 ANNUAL RATE OF GROWTH dry weather flow = 7.2% EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA 18

15 Ml/d 12

y = 0.0118x - 12.47 9

6

3 y = 0.0115x - 12.257

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow design ADWF CIVtech Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)

MELKBOSSTRAND WWTW: ORGANIC LOAD 150,000

137,500 y = 69.031x - 76029 125,000

112,500 20Ml/d extensions commissioned 100,000

87,500 ANNUAL RATE OF GROWTH: 75,000 total load = 8.6%

62,500 ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED 50,000 FROM TABLEVIEW AREA 37,500 Population Equivalents

25,000

12,500

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) WASTEWATER TREATMENT WORKS

MITCHELLS PLAIN WWTW: FLOW

45 y = 0.0198x + 6.5067

40

35

30 y = 0.0184x + 8.2804

25 Ml/d 20

15

10 ANNUAL RATE OF GROWTH: total flow = 0.7% 5 dry weather flow = 0.5%

0

Jul-1997 Jul-1999 Jul-2001 Jul-2003 Jul-2005 Jul-2007 Jul-2009 Jul-2011 Jul-2013 Jul-2015 Jul-2017 Jul-2019

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

MITCHELLS PLAIN WWTW: ORGANIC LOAD 550,000 y = 1,140x - 1,031,966 500,000

450,000

400,000

350,000

300,000

250,000

200,000

150,000

100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 3.1%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) GORDONS BAY WASTEWATER TREATMENT WORKS

GORDON'S BAY WWTW: FLOW 9

8

7

6 y = 0.0101x - 9.9521

5

Ml/d 4

3 y = 0.0077x - 7.2896

2 ANNUAL RATE OF GROWTH: 1 total flow = 7.5% dry weather flow = 6.3%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

GORDON'S BAY WWTW: ORGANIC LOAD 40,000

35,000 y = 81.307x - 86887

30,000

25,000

20,000

15,000 Population Equivalents 10,000

ANNUAL RATE OF GROWTH: 5,000 total load = 11.5%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents Design Organic Load Linear (Population Equivalents) GREEN POINT SEA OUTFALL: FLOW & LOAD

GREEN POINT: FLOW 35 y = -0.0041x + 31.221

30

25

y = -0.0041x + 29.982 20 Ml/d 15

10

5 ANNUAL RATE OF GROWTH: total flow = -0.2% dry weather flow = -0.7% 0

Jul-1997Jul-1998Jul-1999Jul-2000Jul-2001Jul-2002Jul-2003Jul-2004Jul-2005Jul-2006Jul-2007Jul-2008Jul-2009Jul-2010Jul-2011Jul-2012Jul-2013Jul-2014Jul-2015Jul-2016Jul-2017Jul-2018Jul-2019Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

GREEN POINT: ORGANIC LOAD

275,000 y = 197.24x - 81012

250,000

225,000

200,000

175,000

150,000

125,000

100,000

75,000 Population Equivalents 50,000

25,000 ANNUAL RATE OF GROWTH: total load = 1.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents Linear (Population Equivalents) HOUT BAY SEA OUTFALL

HOUT BAY: FLOW 10

9

8

7

6

5 Ml/d 4 y = -0.0072x + 12.851 3

2 ANNUAL RATE OF GROWTH: y = -0.0129x + 19.732 1 total flow = -1.0% dry weather flow = -2.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

HOUT BAY: ORGANIC LOAD 100,000

90,000

80,000 y = -16.657x + 53833 70,000

60,000

50,000

40,000

30,000 Population Equivalents 20,000 ANNUAL RATE OF GROWTH: 10,000 total load = 2.0%

0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020

Population Equivalents design organic load Linear (Population Equivalents) KRAAIFONTEIN WASTEWATER TREATMENT WORKS

KRAAIFONTEIN WWTW: FLOW

18

16 y = 0.0466x - 50.034

14

12

10 y = 0.0442x - 47.708

Ml/d 8

6

4 ANNUAL RATE OF GROWTH: total flow = 9.4% 2 dry weather flow = 9.3%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Daily Flow Dry weather flow Design ADWF CWC estimate Linear (Dry weather flow) Linear (Daily Flow)

KRAAIFONTEIN WWTW: ORGANIC LOAD 170,000 160,000 150,000 140,000 130,000 y = 358.85x - 390135 120,000 110,000 100,000 90,000 80,000 70,000 60,000 Population Equivalents 50,000 40,000 30,000 ANNUAL RATE OF GROWTH: 20,000 total load = 10.1% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) LLANDUDNO WASTEWATER TREATMENT WORKS

LLANDUDNO WWTW: FLOW 0.60

0.55

0.50

0.45

0.40

0.35 y = 0.0003x - 0.1929 0.30

ML/d 0.25 y = 0.0002x - 0.0924 0.20

0.15

0.10 ANNUAL RATE OF GROWTH: 0.05 total flow = 3.0% dry weather flow = 4.1% 0.00 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

LLANDUDNO WWTW: ORGANIC LOAD 3,200

2,800

2,400

y = 1.1204x - 182.85 2,000

1,600

1,200

800 Population Equivalents

400 ANNUAL RATE OF GROWTH: total load = 2.0% 0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020

Population Equivalents design organic load Linear (Population Equivalents) MACASSAR WASTEWATER TREATMENT WORKS

MACASSAR WWTW: FLOW 80.0 75.0 20Ml/d extension 70.0 2 addn. SST's commissioned commissioned 65.0 y = 0.1219x - 112.75 60.0 55.0 50.0 y = 0.1131x - 104.77 45.0 40.0

Ml/d 35.0 30.0 25.0 20.0 15.0 ANNUAL RATE OF GROWTH: 10.0 total flow = 5.4% 5.0 dry weather flow = 6.0% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

MACASSAR WWTW: ORGANIC LOAD 550,000

500,000 y = 798.2x - 783937

450,000

400,000

350,000

300,000

250,000

200,000

150,000 Population Equivalents 100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 6.5%

0 Jul-97 Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-04 Jul-05 Jul-06 Jul-07 Jul-08 Jul-09 Jul-10 Jul-11 Jul-12 Jul-13 Jul-14 Jul-15 Jul-16 Jul-17 Jul-18 Jul-19 Jul-20

Population Equivalents Design Organic Load Linear (Population Equivalents) MELKBOSSTRAND WASTEWATER TREATMENT WORKS

MELKBOSSTRAND WWTW: FLOW 27

24 ANNUAL RATE OF GROWTH: total flow = 8.7% 21 ANNUAL RATE OF GROWTH dry weather flow = 7.2% EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA 18

15 Ml/d 12

y = 0.0118x - 12.47 9

6

3 y = 0.0115x - 12.257

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow design ADWF CIVtech Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)

MELKBOSSTRAND WWTW: ORGANIC LOAD 150,000

137,500 y = 69.031x - 76029 125,000

112,500 20Ml/d extensions commissioned 100,000

87,500 ANNUAL RATE OF GROWTH: 75,000 total load = 8.6%

62,500 ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED 50,000 FROM TABLEVIEW AREA 37,500 Population Equivalents

25,000

12,500

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) MITCHELLS PLAIN WASTEWATER TREATMENT WORKS

MITCHELLS PLAIN WWTW: FLOW

45 y = 0.0198x + 6.5067

40

35

30 y = 0.0184x + 8.2804

25 Ml/d 20

15

10 ANNUAL RATE OF GROWTH: total flow = 0.7% 5 dry weather flow = 0.5%

0

Jul-1997 Jul-1999 Jul-2001 Jul-2003 Jul-2005 Jul-2007 Jul-2009 Jul-2011 Jul-2013 Jul-2015 Jul-2017 Jul-2019

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

MITCHELLS PLAIN WWTW: ORGANIC LOAD 550,000 y = 1,140x - 1,031,966 500,000

450,000

400,000

350,000

300,000

250,000

200,000

150,000

100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 3.1%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) PAROW WASTEWATER TREATMENT WORKS

PAROW WWTW: FLOW

3.0

2.5

Flow restricted from now on 2.0 y = 0.0057x - 5.3408

y = 0.0029x - 1.9219 1.5 Ml/d

1.0

0.5 RATE OF GROWTH: annual flow = 7.7% dry weather flow = 6.6%

0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

PAROW WWTW: ORGANIC LOAD 16,000

14,000

12,000 y = 49.238x - 50731

10,000

8,000

6,000

4,000 Population Equivalents

2,000 ANNUAL RATE OF GROWTH: total load = 9.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) POTSDAM WASTEWATER TREATMENT WORKS

POTSDAM WWTW: FLOW 65

60 y = 0.0981x - 88.881 55 y = 0.0993x - 91.649

50

45

40 Excess flow 35 diverted to Melkbos

Ml/d 30 WWTW 25

20

15

10 ANNUAL RATE OF GROWTH: total flow = 5.2% 5 dry weather flow = 5.8%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF 1997 Strategic Study projection CIVtech Linear (Daily Flow) Linear (Dry weather flow)

POTSDAM WWTW: ORGANIC LOAD

550,000 y = 1,172x - 1,117,322 500,000

450,000

400,000

350,000

300,000

250,000

200,000 Population Equivalents 150,000

100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 3.9% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) POTSDAM WWTW: FLOW/ CAPACITY FORMAL CAPACITY EXTENSION

65 60 55 50 45 40 35 30 Ml/d 25 20 15 10 5 0 Jul-97 Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-04 Jul-05 Jul-06 Jul-07 Jan-98 Jan-99 DesignJan-00 TreatmentJan-01 CapacityJan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Daily Flow 1997 Strategic Study projection Estimated developmental impacts over next 3 years Flocculant Chemical addition (Temporary) SCOTTSDENE WASTEWATER TREATMENT WORKS

SCOTTSDENE WWTW: FLOW

20

18

16

14

12 y = 0.0481x - 51.616 y = 0.0431x - 45.744 10 Ml/d 8

6

4 ANNUAL RATE OF GROWTH: total flow = 12.7% 2 dry weather flow = 12.4%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF divert to or from Linear (Daily Flow) Linear (Dry weather flow)

SCOTTSDENE WWTW: ORGANIC LOAD

150,000 140,000 130,000 120,000 110,000 100,000 90,000 y = 424.12x - 474145 80,000 70,000 60,000 50,000

Population Equivalents 40,000 30,000 20,000 ANNUAL RATE OF GROWTH: total load = 15.2% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) SIMONS TOWN WASTEWATER TREATMENT WORKS

SIMONS TOWN WWTW: FLOW 5.5

5.0

4.5

4.0

3.5 y = 0.0049x - 4.2549

3.0

Ml/d 2.5

2.0 y = 0.0034x - 2.5987 1.5

1.0 ANNUAL RATE OF GROWTH: 0.5 total flow = 4.1% dry weather flow = 2.8% 0.0

Jul-1997Jul-1998Jul-1999Jul-2000Jul-2001Jul-2002Jul-2003Jul-2004Jul-2005Jul-2006Jul-2007Jul-2008Jul-2009Jul-2010Jul-2011Jul-2012Jul-2013Jul-2014Jul-2015Jul-2016Jul-2017Jul-2018Jul-2019Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

SIMONS TOWN WWTW: ORGANIC LOAD 30,000

27,000

24,000

21,000

18,000

15,000 y = 41.981x - 42659 12,000

9,000 Population Equivalents 6,000

ANNUAL RATE OF GROWTH: 3,000 total load = 6.9%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) CATCHMENT 1

y = 0.8889x - 1034.7y = 0.8008x - 931.86 CATCHMENT 1: TOTAL FLOW Bellville, Kraaifontein, Scottsdene & Fisantekraal 130 120 Fisantekraal - 110 20Ml/d 100 90 80 70 Kraaifontein Ml/d 60 extension 50 40 30 ANNUAL RATE OF GROWTH: 20 total flow = 4.7% dry weather flow = 4.0% 10 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily flow Dry weather flow design ADWF Linear (Daily flow) Linear (Dry weather flow)

CATCHMENT 1: TOTAL ORGANIC LOAD Bellville, Kraaifontein, Scottsdene & Fisantekraal 1,300,000 1,200,000 1,100,000 1,000,000 900,000 800,000 700,000 600,000 500,000 400,000

population equivalents 300,000 y = 783x - 864,280 200,000 ANNUAL RATE OF GROWTH: 100,000 total load = 4.5% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

population equivalents design organic load Linear (population equivalents) CATCHMENT 2 CATCHMENT 2: TOTAL FLOW Athlone, Cape Flats, Borcherds Quarry & Parow 450

400

350

300

y = -0.4021x + 758.76 250

Ml/d 200

150 y = -0.3692x + 693.51 100 RATE OF GROWTH: annual flow = -1.5% 50 dry weather flow = -1.8%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)

CATCHMENT 2: TOTAL ORGANIC LOAD Athlone, Cape Flats, Borcherds Quarry & Parow 3,000,000

2,750,000

2,500,000

2,250,000

2,000,000

1,750,000

1,500,000

1,250,000 y = -826x + 3,073,339 1,000,000 population equivalents (p.e.) 750,000

500,000 ANNUAL RATE OF GROWTH: total load = 0.3% 250,000

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

design organic load population equivalents Linear (population equivalents) CATCHMENT 3

CATCHMENT 3: TOTAL FLOW Mitchells Plain, Macassar, Zandvliet & Gordon's Bay

200

y = 0.1673x - 87.271

150 y = 0.1896x - 116.54

Ml/d 100

50 ANNUAL RATE OF GROWTH: total flow = 1.9% dry weather flow = 2.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily flow Dry weather flow design ADWF Linear (Daily flow) Linear (Dry weather flow)

CATCHMENT 3: TOTAL ORGANIC LOAD Mitchells Plain, Macassar, Zandvliet & Gordon's Bay 1,600,000 1,500,000 y = 2,762x - 2,532,832 1,400,000 1,300,000 1,200,000 1,100,000 1,000,000 900,000 800,000 700,000 600,000 500,000 Population Equivalents 400,000 300,000 ANNUAL RATE OF GROWTH: 200,000 total load = 4.4% 100,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) CATCHMENT 4:

CATCHMENT 4: TOTAL FLOW Potsdam, Melkbosstrand & Wesfleur 120 110 100 90 80 y = 0.1241x - 107.9 70 60 Ml/d 50 y = 0.1186x - 102.89 40 30 20 ANNUAL RATE OF GROWTH: total flow = 4.3% 10 dry weather flow = 4.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

design ADWF Daily Flow CWC proj.1 Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)

CATCHMENT 4: TOTAL ORGANIC LOAD Potsdam, Melkbosstrand & Wesfleur 800,000

700,000

600,000 y = 1,736x - 1,695,349 500,000

400,000

300,000

200,000

100,000 ANNUAL RATE OF GROWTH: total load = 5.0% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

design organic load Population Equivalents Linear (Population Equivalents) CATCHMENT 5

CATCHMENT 5: TOTAL FLOW Simons Town & Wildevoelvlei

40

35

30

y = 0.0399x - 38.773 25

20 Ml/d

15 y = 0.035x - 33.389 10

ANNUAL RATE OF GROWTH: 5 total flow = 1.8% dry weather flow = 1.3%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily flow Dry weather flow design ADWF Linear (Daily flow) Linear (Dry weather flow)

CATCHMENT 5: ORGANIC LOAD Simons Town & Wildevoelvlei 250,000

225,000

200,000

y = 707x - 799,510 175,000

150,000

125,000

100,000

75,000 Population Equivalents 50,000 ANNUAL RATE OF GROWTH: 25,000 total load = 5.2%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) CATCHMENT 6

CATCHMENT 6: TOTAL FLOW Llandudno & Sea Outfalls 50

45

40

35 y = -0.0127x + 48.005

30

25 Ml/d 20 y = -0.0307x + 68.93

15

10 ANNUAL RATE OF GROWTH: 5 total flow = -0.2% dry weather flow = -1.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily flow Dry weather flow design AWDF

Linear (Daily flow) Linear (Dry weather flow)

CATCHMENT 6: TOTAL ORGANIC LOAD Llandudno & Sea Outfalls 400,000

350,000

y = 278.17x - 131310 300,000

250,000

200,000

150,000

Population Equivalents 100,000

50,000 ANNUAL RATE OF GROWTH: total load = 1.8% 0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020

design organic load Population Equivalents Linear (Population Equivalents) WESFLEUR DOMESTIC WASTEWATER TREATMENT WORKS

WESFLEUR DOMESTIC WWTW: FLOW

9.0

8.0

y = 0.0003x + 5.513 7.0

6.0

5.0 y = -0.001x + 7.0961

Ml/d 4.0

3.0

2.0

1.0 ANNUAL RATE OF GROWTH: total flow = 0.2% dry weather flow = 0.2% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

WESFLEUR DOMESTIC WWTW: ORGANIC LOAD 100,000 y = 24.549x + 14174 90,000

80,000

70,000

60,000

50,000

40,000

30,000 Population Equivalents

20,000

10,000 ANNUAL RATE OF GROWTH: total load = 0.7% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) WESFLEUR INDUSTRIAL WASTEWATER TREATMENT WORKS

WESFLEUR INDUSTRIAL WWTW: FLOW 12.0

11.0 Step increase in flow from one dyehouse has skewed 10.0 projections based on flows since July 1997, hence flows 9.0 from Nov 2000 only 8.0 considered

7.0 y = 0.0134x - 11.623

6.0 Ml/d 5.0

4.0 y = 0.006x - 2.8969 3.0

2.0 ANNUAL RATE OF GROWTH: 1.0 total flow = 9.6% dry weather flow = 6.7% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

WESFLEUR INDUSTRIAL WWTW: ORGANIC LOAD 130,000

120,000

110,000

100,000

90,000

80,000

70,000

60,000 y = 44.64x + 13368

50,000

40,000

30,000 Population Equivalents

20,000 Step increase in flow from one dyehouse has skewed 10,000 projections based on flows since July 1997, hence flows from ANNUAL RATE OF GROWTH: Nov 2000 only considered total load = 4.5% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) WILDEVOELVLEI WASTEWATER TREATMENT WORKS

WILDEVOELVLEI WWTW: FLOW

24

22

20

y = 0.0333x - 32.448 18

16

14

12 y = 0.0296x - 28.357 Ml/d 10

8

6

4 ANNUAL RATE OF GROWTH: total flow = 5.6% 2 dry weather flow = 4.5%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)

WILDEVOELVLEI WWTW: ORGANIC LOAD 170,000 160,000 150,000 y = 664.95x - 756851 140,000 130,000 120,000 110,000 100,000 90,000 80,000 70,000 60,000 50,000

Population Equivalents 40,000 30,000 20,000 ANNUAL RATE OF GROWTH: total load = 25.1% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Population Equivalents design organic load Linear (Population Equivalents) ZANDVLIET WASTEWATER TREATMENT WORKS

ZANDVLIET WWTW: FLOW 100

90

80

70

y = 0.001x + 46.386 60

50

Ml/d y = 0.0313x + 10.154 40

30

20 ANNUAL RATE OF GROWTH: 10 total flow = -0.7% dry weather flow = 0.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

Daily Flow Dry weather flow CWC proj.1 Hyd Cap Linear (Daily Flow) Linear (Dry weather flow)

ZANDVLIET WWTW: ORGANIC LOAD y = 742.72x - 630043 550,000

500,000

450,000

400,000

350,000

300,000

250,000

200,000

150,000 Population Equivalents

100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 2.7%

0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020

design organic load Population Equivalents Linear (Population Equivalents)