RAND WATER ANNUAL REPORT 2023

Five-year Trend in Supply Volumes

(Volume (Mℓ/d ))

(% excess over license target)

10

4 600

4 521

4 500

8

8

4 445

4 382

4 400

7

4 365

6

4 332

5

5

4 300

4

4,7

4

4 169

4 169

4 169

4 169

4 169

4 169

4 200

4 170

2

4 100

1,7

1,4

1,2

0

0

(0,8)

4 000

-2

3 900

2018

2019

2020

2021

2022

2023

m Total Supply Volumes m Project 1 600 Target

– Percentage Exceeding 1 600 Target Year-on-year Growth

Figure 21: Medium term growth in supply volumes

WATER QUALITY MANAGEMENT The ability to perform effective water quality assurance is entrenched in Rand Water’s extensive integrated water quality management system. This system encompasses the entire water supply chain starting in the catchment, progressing through the purification and distribution systems, and ending at the point of delivery to the customers. Source Water Quality The Vaal Dam is the core of the supply of water in the Vaal River System. The quality and quantity of the region’s water resources, in particular the Vaal Dam, are continuously under the spotlight and have received extensive media attention throughout the year. The latter issues range from untreated/ partially treated sewage pollution events to fish kills, increased algal blooms, floods, and alien aquatic vegetation. It is in the interest of Rand Water business as well as a legal requirement to monitor catchment raw water quality. Monitoring The rivers and dams in the catchments of Rand Water’s area of interest are extensively monitored and a great deal of effort goes into communicating the water quality status of these catchments to interested and affected parties. This takes place through involvement in Catchment Forums and the Forums website, ( www.reservoir.co.za ) which is maintained by Rand Water. There are four (4) Catchment Forums in each of the Vaal Dam and Vaal Barrage sub-catchments. The monitoring programme comprises an extensive network of about 200 sampling locations across the catchment. The Vaal Dam and Vaal River Barrage reservoir are sampled by boat, while the rivers are sampled from the banks. The monitoring schedule is computerised and everyday collection lists are produced for each route. All samples are analysed by Rand Water’s Analytical Services laboratory and the results are stored in its Laboratory Information Management System (LIMS).

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