The short answer
Yes. The City of Cape Town says its tap water is treated and tested "to make sure it is safe for you to drink", and it publishes the test results. The rest of this guide explains where that statement comes from and where it stops.
The City checks its water against SANS 241:2015, the South African National Standard for drinking water, under the checks prescribed by the national Department of Water and Sanitation. According to the City, its laboratory tests over 5 700 water samples each year (City of Cape Town, water quality).
How the City tests its water
Samples are taken at several stages, which matters when you think about what the results cover. The City lists raw water from dams and boreholes, water after treatment at the treatment plants, water from reservoirs, and water drawn from designated sampling points in the pipework around Cape Town. It tests these samples on a weekly or bi-weekly basis.
The work sits under a quality management system that spans three of the City's Scientific Services laboratories. The national Department of Water and Sanitation has awarded the City many Blue Drop certificates for its water quality and its management systems, as well as a Platinum Blue Drop Award for consistent performance over a number of years.
These statements come from the municipality responsible for the supply, not from anyone selling water, and the annual report states that the City is legally required to publish its tap water quality data once a year.
What the latest results show
The City publishes a compliance table measured against SANS 241, quarter by quarter. For the 2024-2025 financial year it shows 99.3% for July to September, 99.4% for October to December, then 99.6% for both January to March and April to June. The three previous financial years sit between 99.0% and 99.5% in every quarter.
The annual report for 1 July 2024 to 30 June 2025 breaks the results down by supply system, from Faure and Voëlvlei to Wemmershoek and Steenbras. In the microbiological section, E. coli is marked "not detected" for every supply listed. The report describes Cape Town's tap water as having held "excellent" compliance status with SANS 241:2015 for many years (City of Cape Town, annual drinking water quality report 2024-2025).
Two cautions go with those figures. A compliance percentage summarises many tests across the network; it is not a reading of the tap in any one building. And reports appear after the period they cover: when we checked, the latest quarterly report on the City's page covered April to June 2026.
What the City's figures do not cover
The City's results describe the City's own network. The plumbing inside a particular building is outside the sampling points it lists.
In practice, that means the reports say nothing about a rooftop tank, a private borehole, a filter fitted by an owner, or old pipes inside one property. They also say nothing about ice or bottled water bought elsewhere. If you are staying in a guesthouse or a holiday rental and want to be sure, ask the host a direct question: are the kitchen taps fed straight from the municipal supply?
The figures also stop at the City's boundary. They describe the City of Cape Town's supply only, so they tell you nothing about water elsewhere in the Western Cape, including Stellenbosch, Franschhoek and Paarl. The report notes that the treatment plants feed an interconnected system of reservoirs and pipelines serving the municipal area, which is why a stay in Sea Point and a stay in Durbanville draw on the same tested network.
Reading the reports yourself
The City's water quality page links to quarterly reports and to annual reports in English, Afrikaans and isiXhosa, with an archive going back several years. The quarterly reports follow the City's financial year, which runs from July to June, so "quarter 1" means July to September rather than January to March.
The annual report also mentions that monthly updates are available on the national Department of Water and Sanitation's "My Water" page. If you want a second, national view of the same supply, that is where to look.
The City's handbook, "Water Quality: Assurance Through Testing", is linked from the same page for anyone who wants the method in more detail.
If someone in your group is unwell
A safe municipal supply does not mean nobody gets an upset stomach on holiday, and this guide cannot tell you the cause of any illness. That question belongs to a doctor who has examined the person.
If someone becomes unwell where you are staying, an independent HPCSA-registered doctor can come to you: see home and hotel doctor in Cape Town. The doctor states the fee before coming out and gives you an invoice with their practice number for your insurer.
Sources
- City of Cape Town, Water quality: https://www.capetown.gov.za/family-and-home/residential-utility-services/residential-water-and-sanitation-services/water-quality/ (checked 27 October 2026)
- City of Cape Town, Annual drinking water quality report, 1 July 2024 to 30 June 2025: capetown.gov.za, annual tap water quality analysis 2025 (PDF) (checked 27 October 2026)
- City of Cape Town, Quarterly water quality analysis report, April to June 2026: capetown.gov.za, quarterly tap water quality report April to June 2026 (PDF) (checked 27 October 2026)
🚨 Emergencies
SA Home Doctor is not an emergency service. In a medical emergency, call 10177 for an ambulance or 112 from a mobile phone. Do not wait for a reply from us.
Questions people ask
Can you drink tap water in Cape Town?
Yes, according to the City of Cape Town. The City says its water is treated and tested so that it is safe to drink, and it checks it against the national drinking water standard, SANS 241:2015.
How often does the City of Cape Town test its water?
The City says its laboratory tests over 5 700 water samples each year, taken on a weekly or bi-weekly basis from dams and boreholes, treatment plants, reservoirs and sampling points in the pipework.
Is the water in my holiday rental covered by the City's tests?
The City's samples come from its own system, up to designated sampling points in its pipework. A building's own tank, borehole or filter is not part of that sampling, so if you are unsure, ask the host whether the taps are fed directly from the municipal supply.
Where can I see the latest water quality results?
On the City of Cape Town's water quality page, which publishes quarterly reports and an annual report in English, Afrikaans and isiXhosa, together with a table of quarterly compliance percentages.
Does this apply to Stellenbosch or Franschhoek?
No. The figures in this guide describe the City of Cape Town's own supply. They say nothing about water supplied elsewhere in the Western Cape.