Sunrella AH
Last Johannesburg Water (JW) report: Tue 29 Sep 2026, 20:40. Water from Cosmo City Reservoir.
Cosmo City: short of water on 1 day this year.
From 190 days with a JW report. A typical reservoir or tower in the city had 4.
Your street may differ: each report covers a reservoir or tower and the area it feeds, and higher streets lose water first. What JW's words mean
Day by day
In 2026 so far: 1 day short of water for Cosmo City Reservoir, from 190 days with a report. A typical supply in the city, the median one (half had fewer), had 4 days.
Each square is a day, as JW reported it for a supply: a reservoir or tower that JW reports on. The number at the right is the month's days short of water.
In 2026 so far, JW reported Cosmo City Reservoir short of water on 1 day
3 March 2025 to 29 September 2026, from 295 days with a JW report.
- water as normal
- supplying fairly
- JW warned
- low, or weak in places
- short of water
- critically low
- shut for the night
- no JW report
- still filling in
JW's reported status of the reservoir or tower, not measured water at taps. Boards from March 2025.
Source: Johannesburg Water's System Update boards and notices, read by us. How this record is made.
Cite this figure
watersearch (2026). “In 2026 so far, JW reported Cosmo City Reservoir short of water on 1 day”. Data release 2026-09-29-318d9dca. https://watersearch.co.za/suburb/sunrella-ah#fig-year
The data as a table
| Month | Days reported | Days in record | Adequate or fair | Poor pressure in places, or low | Warning: no water may occur | Poor pressure to no water | Critically low | Overnight closure |
|---|---|---|---|---|---|---|---|---|
| March 2025 | 18 | 29 | 18 | 0 | 0 | 0 | 0 | 0 |
| April 2025 | 22 | 30 | 22 | 0 | 0 | 0 | 0 | 0 |
| May 2025 | 16 | 31 | 15 | 0 | 0 | 0 | 0 | 1 |
| June 2025 | 28 | 30 | 28 | 0 | 0 | 0 | 0 | 0 |
| July 2025 | 21 | 31 | 21 | 0 | 0 | 0 | 0 | 0 |
| August 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| September 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| October 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| November 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| December 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| January 2026 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| February 2026 | 7 | 28 | 5 | 0 | 0 | 1 | 0 | 1 |
| March 2026 | 21 | 31 | 20 | 1 | 0 | 0 | 0 | 0 |
| April 2026 | 30 | 30 | 30 | 0 | 0 | 0 | 0 | 0 |
| May 2026 | 31 | 31 | 29 | 0 | 0 | 0 | 0 | 2 |
| June 2026 | 30 | 30 | 29 | 0 | 0 | 0 | 0 | 1 |
| July 2026 | 30 | 31 | 27 | 0 | 0 | 0 | 0 | 3 |
| August 2026 | 21 | 31 | 16 | 3 | 0 | 0 | 0 | 2 |
| September 2026 | 20 | 29 | 18 | 1 | 0 | 0 | 0 | 1 |
A day counts as short of water when JW's worst report for it that day was “poor pressure to no water” or “critically low”, as happening or expected (expected most often means higher streets). A warning that it may occur does not count.
In short
The latest JW report on this site is from 29 September 2026; the site last read JW's website on 1 October. Cosmo City Reservoir had water as normal. JW reported it short of water on 1 of the 190 days it reported it this year. A typical reservoir or tower in the city had 4 such days. On Cosmo City Reservoir, its one outage lasted at least 36 hours.
Latest JW report
Cosmo City Reservoir, 29 September 2026: water as normal at 13:18 (JW: “Supplying adequately”), then closed overnight on purpose at 20:40 (JW: “Outlet closed overnight as part of Water Demand Management”).
JW put it on its website 1 October 2026 at 13:40. JW's page for this board ↗ · JW's image of the board ↗
Also on OurPower ↗.
Where Sunrella AH gets its water
JW links Sunrella AH to one supply, Cosmo City Reservoir.
| Supply | System | How JW links it to Sunrella AH |
|---|---|---|
| Cosmo City Reservoir | Randburg | Listed on JW's pages, as Sunrella A.h.. Source 1 ↗ Source 2 ↗ |
Outages
JW reported 1 outage on Sunrella AH's supply since March 2025. The longest lasted at least 36 hours. Every outage, with how long it lasted: Cosmo City Reservoir.
JW's end dates
JW posted 6 notices with an end date that list a suburb or system Sunrella AH's supply feeds. Most name only suburbs, not the reservoir or tower, so the summary at the top uses only a notice that names the supply itself. By the stated time JW's boards showed the water back on none of the 4 end times that have passed. Each end date against what happened: Cosmo City Reservoir.
Under strain
In 2026 so far, Sunrella AH had 5 days under strain: days when JW reported any of its supplies low or worse, or warned that higher-lying areas may lose water. This is a wider count than days short of water.
The network is linked. When a supply runs low, the reservoirs and towers around it carry more. At such times JW's boards sometimes warn of “poor pressure to no water in higher-lying areas”: under strain, higher streets lose water first. JW does not say which streets those are.
What JW's boards cannot tell you
JW's boards report reservoirs and towers, so some things are not in this record:
- Whether water reaches your street or your tap.
- Which streets lose water first: JW warns of higher-lying areas but does not name the streets.
- Why a supply ran low, unless a JW notice gives a reason.
- Pipe bursts, tankers and valve work, which are not on the boards.
Source: JW's System Update boards and notices, read by us. The full list, and how this record is made.