RAND WATER ANNUAL REPORT 2023

Customer Bulk Distribution water quality report: 22 June 2022 to 22 June 2023 Determinands Measurement Units Risks

SANS 241:2015 standard limits (1)

No of results

Required compliances to SANS 241:2015 spec (%)

Achieved compliances to SANS 241:2015 spec (%)

Boron

(µg / L as B) (µg / L as Cd) (µg / L as Cr) (µg / L as Cu) (µg / L as CN) (µg / L as Fe) (µg / L as Fe) (µg / L as Pb) (µg / L as Mn) (µg / L as Mn) (µg / L as Hg) (µg / L as Ni) (µg / L as Se) (µg / L as U)

Chronic health Chronic health Chronic health Chronic health Acute health Chronic health

≤ 2400

1 361 1 289 1 361 1 361 1 284 1 402 1 402 1 289 1 373 1 373 1 288 1 361 1 289 1 243 1 230 1 148 1 419 1 419 1 419

97.0% 97.0% 97.0% 97.0% 99.0% 97.0% 95.0% 97.0% 97.0% 95.0% 97.0% 97.0% 97.0% 97.0% 97.0% 95.0% 97.0% 97.0% 97.0%

100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100%

Cadmium

≤ 3

Chromium (Total)

≤ 50

Copper

≤ 2000

Cyanide (Recoverable)

≤ 200

Iron Iron

≤ 2000

Aesthetic

≤ 300

Lead

Chronic health Chronic health

≤ 10

Manganese Manganese

≤ 400 ≤ 100

Aesthetic

99.93%

Mercury

Chronic health Chronic health Chronic health Chronic health

≤ 6

Nickel

≤ 70 ≤ 40 ≤ 30

Selenium Uranium

Organic determinands Total Organic Carbon Phenols as C 6 H 5 OH Chloroform - CHCl 3 Bromoform - CHBr 3 Dibromochloromethane - CHBr 2 Cl Bromodichloromethane - CHBrCl 2 Combined trihalomethanes (5)

(mg / L) (µg / L) (µg / L) (µg / L) (µg / L)

Chronic health

≤ 10 ≤ 10

Aesthetic

Chronic health Chronic health Chronic health

≤ 300 ≤ 100 ≤ 100

(µg / L)

Chronic health

≤ 60

1 419

97.0%

100%

(µg / L)

Chronic health

≤ 1

1 416

97.0%

99.51%

Total Microcystin (2)

(µg / L)

Chronic health

≤ 1

255

97.0%

100%

For monitoring/reporting purposes only Calcium (6)

(mg / L as Ca)

Aesthetic

≤ 150

1 361 1 361

not applicable not applicable

100%

Operational

≥ 20 to ≤ 200

98.31%

Hardness (7)

(mg / L as CaCO 3 )

Magnesium (6) Potassium (6)

(mg / L as Mg) (mg / L as K)

Aesthetic Aesthetic

≤ 70 ≤ 50

1 361 1 360

not applicable not applicable

100% 100%

Rand Water Risk Determinands (RWRD) (6) Odour TON

RWRD RWRD

≤ 2 ≤ 2

3 616 3 616

not applicable not applicable

100% 100%

Taste

FTN

Table: 11: Water Quality Risk Indices

120