Wastewater: DWS National Integrated Water Information System (NIWIS), wastewater quality compliance, retrieved 28 October 2026, covering 143 water services authorities. The map shows the "Microbiological" figure (E. coli in treated effluent). DWS publishes whole percentages, so councils are banded on the rounded figure: Excellent 90% or more, Good 70–89%, Poor 50–69%, Bad under 50%. The export shows 0% where no samples were taken, so an authority with 0% for chemical, microbiological and physical compliance together is shown as no samples reported. Saldanha Bay is not in the export. The list of treatment works in each council's popup comes from the Green Drop Report 2025 (848 works, each placed in the council where it sits).
Drinking water: DWS Integrated Regulatory Information System (IRIS), drinking water quality compliance (SANS 241:2015) for 2026, retrieved 29 October 2026, covering 144 water services authorities. The map shows the "Acute Health – Microbiological" figure (E. coli), banded as DWS does: Excellent above 99%, Good 97–99%, Poor 95–97%, Bad under 95%. IRIS shows 0% where no results were reported; these councils are shown as no samples reported.
Both water measures are reported per water services authority, so where a district runs water services, every council in that district shows the district's figure.
Audit: Auditor-General, MFMA 2024-25 (tabled 24 June 2026). Johannesburg is shown with its consolidated result.
Council: IEC 2021 results updated for by-elections to June 2026; coalition mayors from the MISTRA Coalitions Barometer (to February 2026), ACCORD's coalition tracker and news reports. Striped councils have no majority party; the colour is the mayor's party.
Boundaries: OCHA / Municipal Demarcation Board (2016 demarcation).
How this map was made: This interactive map was developed by GroundUp with the assistance of Claude AI.