Lenasia
Last Johannesburg Water (JW) report: Tue 29 Sep 2026, 20:10
Both of Lenasia's supplies: short of water on 3 and 5 days this year.
Each from 194 days with a JW report. A typical reservoir or tower in the city had 4.
At JW's last report: Supplying fairly (1) Level low (1)
JW lists Lenasia under both supplies and does not say which streets each one reaches.
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: 5 days short of water for Lenasia Hospital Hill Reservoir, from 194 days with a report; 3 days for Lenasia Cosmos Reservoir, from 194. 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 at least one of Lenasia's 2 supplies short of water on 8 days
3 March 2025 to 29 September 2026, from 486 days with a JW report.
Lenasia Cosmos Reservoir
In 2026 so far: 3 days short of water, from 194 days with a JW report.
Lenasia Hospital Hill Reservoir
In 2026 so far: 5 days short of water, from 194 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 at least one of Lenasia's 2 supplies short of water on 8 days”. Data release 2026-09-29-318d9dca. https://watersearch.co.za/suburb/lenasia#fig-year
The data as a table
| Supply | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Lenasia Cosmos Reservoir | March 2025 | 0 | 29 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | April 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | May 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | June 2025 | 26 | 30 | 25 | 0 | 0 | 0 | 1 | 0 |
| Lenasia Cosmos Reservoir | July 2025 | 24 | 31 | 24 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | August 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | September 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | October 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | November 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | December 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | January 2026 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | February 2026 | 7 | 28 | 5 | 1 | 0 | 0 | 1 | 0 |
| Lenasia Cosmos Reservoir | March 2026 | 23 | 31 | 23 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | April 2026 | 30 | 30 | 30 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | May 2026 | 30 | 31 | 30 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | June 2026 | 30 | 30 | 30 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | July 2026 | 31 | 31 | 30 | 1 | 0 | 0 | 0 | 0 |
| Lenasia Cosmos Reservoir | August 2026 | 22 | 31 | 20 | 0 | 0 | 2 | 0 | 0 |
| Lenasia Cosmos Reservoir | September 2026 | 21 | 29 | 21 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | March 2025 | 0 | 29 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | April 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | May 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | June 2025 | 25 | 30 | 25 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | July 2025 | 23 | 31 | 23 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | August 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | September 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | October 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | November 2025 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | December 2025 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | January 2026 | 0 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | February 2026 | 7 | 28 | 4 | 2 | 0 | 1 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | March 2026 | 23 | 31 | 23 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | April 2026 | 30 | 30 | 30 | 0 | 0 | 0 | 0 | 0 |
| Lenasia Hospital Hill Reservoir | May 2026 | 30 | 31 | 23 | 0 | 0 | 1 | 0 | 6 |
| Lenasia Hospital Hill Reservoir | June 2026 | 30 | 30 | 25 | 2 | 0 | 0 | 0 | 3 |
| Lenasia Hospital Hill Reservoir | July 2026 | 31 | 31 | 23 | 2 | 0 | 1 | 1 | 4 |
| Lenasia Hospital Hill Reservoir | August 2026 | 22 | 31 | 14 | 2 | 0 | 0 | 1 | 5 |
| Lenasia Hospital Hill Reservoir | September 2026 | 21 | 29 | 17 | 1 | 0 | 0 | 0 | 3 |
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. That day Lenasia Hospital Hill Reservoir was low at 13:10 and had water, weak in some places at 20:10. Lenasia Cosmos Reservoir was supplying fairly. This year Lenasia Hospital Hill Reservoir was short of water on 5 of the 194 days JW reported it. A typical reservoir or tower in the city had 4 such days. On Lenasia Hospital Hill Reservoir, half of its last 5 outages were over within 15 hours; the longest since March 2025 lasted 20 hours. No JW notice we have read names Lenasia Hospital Hill Reservoir. None of the 2 passed end dates on its page was met.
Latest JW report
Lenasia Hospital Hill Reservoir, 29 September 2026: level low at 13:10, the worst status in this report (JW: “Supplying fairly but low,”), then water, weak in some places at 20:10 (JW: “Reduced pumping”).
JW put it on its website 1 October 2026 at 13:40. JW's page for this board ↗ · JW's image of the board ↗
Lenasia Cosmos Reservoir, 29 September 2026: supplying fairly at 20:10 (JW: “Supplying fairly”).
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 Lenasia gets its water
Lenasia draws on two supplies at once: Lenasia Cosmos Reservoir and Lenasia Hospital Hill Reservoir. JW does not say which street each one reaches.
| Supply | System | How JW links it to Lenasia |
|---|---|---|
| Lenasia Cosmos Reservoir | Deep South | Listed on JW's pages, as Lenasia, Lenasia Ext.1, Lenasia Ext.10, Lenasia Ext.11, Lenasia Ext.12, Lenasia Ext.13, Lenasia Ext.2, Lenasia Ext.20, Lenasia Ext.3, Lenasia Ext.4, Lenasia Ext.5, Lenasia Ext.6, Lenasia Ext.7, Lenasia Ext.8, Lenasia Ext.9. Source 1 ↗ |
| Lenasia Hospital Hill Reservoir | Deep South | Listed on JW's pages, as Lenasia, Lenasia Ext.1, Lenasia Ext.10, Lenasia Ext.11, Lenasia Ext.12, Lenasia Ext.13, Lenasia Ext.2, Lenasia Ext.20, Lenasia Ext.3, Lenasia Ext.4, Lenasia Ext.5, Lenasia Ext.6, Lenasia Ext.7, Lenasia Ext.8, Lenasia Ext.9. Source 1 ↗ |
Outages
JW reported 8 outages on Lenasia's supplies since March 2025. The longest lasted 2.1 days. Every outage, with how long it lasted: Lenasia Cosmos Reservoir and Lenasia Hospital Hill Reservoir.
JW's end dates
JW posted 2 notices with an end date that list a suburb or system Lenasia's supplies feed. 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: Lenasia Cosmos Reservoir and Lenasia Hospital Hill Reservoir.
Under strain
In 2026 so far, Lenasia had 16 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. Lenasia draws on all its supplies at once, and when one runs low the others 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.