Rand Water | Integrated Annual Report 2025

INTEGRATED ANNUAL REPO

Compliance report for organic contaminants assessment in Rand Water drinking water supply value chain: 2024/25 FY Organic contaminants Unit of Measure Guidelines Limit Analysing laboratory Reporting Limit No. results Achieved compli ance level (%) Limit Source Value Units Terbuthylazine mg/L 0,01 AG M&L <20 µg/l 31 100% Trifluralin ng/l 20x10 3 WHO RW <30 ng/l 31 100% Vinclozolin mg/L 0,001 RW M&L <20 µg/l 31 100% PCBs Chlorobiphenyl ng/l 500 USEPA RW <45 ng/l 31 100% Dichlorobiphenyl RW <55 ng/l 31 100% Heptachlorobiphenyl RW <30 ng/l 31 100% Hexachlorobiphenyl RW <25 ng/l 31 100% Octachlorobiphenyl RW <35 ng/l 31 100% Pentachlorobiphenyl RW <30 ng/l 31 100% Tetrachlorobiphenyl RW <25 ng/l 31 100% Trichlorobiphenyl RW <35 ng/l 31 100% Notes: AG Australian Water Quality Guidelines WHO World Health Organisation RW Rand Water EU European Union MDH Minnesota Department of Health USEPA United States Environmental Protection Agency

153

Rand Water | Integrated Annual Report 2025