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 Linden 1 Reservoir, from 190 days with a report; 0 days for Linden 2 Reservoir, from 190. 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 Jacanlee's 2 supplies short of water on 1 day
3 March 2025 to 29 September 2026, from 561 days with a JW report.
Linden 2 Reservoir
In 2026 so far: 0 days short of water, from 190 days with a JW report.
11531short
2025
Mar0
Apr0
May0
Jun0
Jul0
AugNo JW boards, Aug 2025 to Jan 2026
2026
Feb0
Mar0
Apr0
May0
Jun0
Jul0
Aug0
Sep0
Linden 1 Reservoir
In 2026 so far: 1 day short of water, from 190 days with a JW report.
11531short
2025
Mar0
Apr0
May0
Jun0
Jul2
AugNo JW boards, Aug 2025 to Jan 2026
2026
Feb0
Mar0
Apr0
May0
Jun0
Jul1
Aug0
Sep0
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 Jacanlee's 2 supplies short of water on 1 day”. Data release 2026-09-29-318d9dca. https://watersearch.co.za/suburb/jacanlee#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
Linden 2 Reservoir
March 2025
18
29
18
0
0
0
0
0
Linden 2 Reservoir
April 2025
22
30
22
0
0
0
0
0
Linden 2 Reservoir
May 2025
15
31
14
0
0
0
0
1
Linden 2 Reservoir
June 2025
2
30
2
0
0
0
0
0
Linden 2 Reservoir
July 2025
17
31
16
0
0
0
0
1
Linden 2 Reservoir
August 2025
0
31
0
0
0
0
0
0
Linden 2 Reservoir
September 2025
0
30
0
0
0
0
0
0
Linden 2 Reservoir
October 2025
0
31
0
0
0
0
0
0
Linden 2 Reservoir
November 2025
0
30
0
0
0
0
0
0
Linden 2 Reservoir
December 2025
0
31
0
0
0
0
0
0
Linden 2 Reservoir
January 2026
0
31
0
0
0
0
0
0
Linden 2 Reservoir
February 2026
7
28
7
0
0
0
0
0
Linden 2 Reservoir
March 2026
21
31
21
0
0
0
0
0
Linden 2 Reservoir
April 2026
30
30
30
0
0
0
0
0
Linden 2 Reservoir
May 2026
31
31
30
0
0
0
0
1
Linden 2 Reservoir
June 2026
30
30
30
0
0
0
0
0
Linden 2 Reservoir
July 2026
30
31
30
0
0
0
0
0
Linden 2 Reservoir
August 2026
21
31
21
0
0
0
0
0
Linden 2 Reservoir
September 2026
20
29
20
0
0
0
0
0
Linden 1 Reservoir
March 2025
18
29
18
0
0
0
0
0
Linden 1 Reservoir
April 2025
22
30
22
0
0
0
0
0
Linden 1 Reservoir
May 2025
16
31
15
0
0
0
0
1
Linden 1 Reservoir
June 2025
28
30
28
0
0
0
0
0
Linden 1 Reservoir
July 2025
23
31
19
2
0
1
1
0
Linden 1 Reservoir
August 2025
0
31
0
0
0
0
0
0
Linden 1 Reservoir
September 2025
0
30
0
0
0
0
0
0
Linden 1 Reservoir
October 2025
0
31
0
0
0
0
0
0
Linden 1 Reservoir
November 2025
0
30
0
0
0
0
0
0
Linden 1 Reservoir
December 2025
0
31
0
0
0
0
0
0
Linden 1 Reservoir
January 2026
0
31
0
0
0
0
0
0
Linden 1 Reservoir
February 2026
7
28
7
0
0
0
0
0
Linden 1 Reservoir
March 2026
21
31
14
7
0
0
0
0
Linden 1 Reservoir
April 2026
30
30
6
24
0
0
0
0
Linden 1 Reservoir
May 2026
31
31
29
1
0
0
0
1
Linden 1 Reservoir
June 2026
30
30
23
7
0
0
0
0
Linden 1 Reservoir
July 2026
30
31
22
7
0
0
1
0
Linden 1 Reservoir
August 2026
21
31
17
4
0
0
0
0
Linden 1 Reservoir
September 2026
20
29
20
0
0
0
0
0
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. Linden 1 Reservoir and Linden 2 Reservoir were supplying fairly or better. JW reported Linden 1 Reservoir and Linden 2 Reservoir short of water on 1 and 0 days this year. A typical reservoir or tower in the city had 4 such days. On Linden 1 Reservoir, half of its last 3 outages were over within 14 hours; the longest since March 2025 lasted 14 hours.
JW reported 3 outages on Jacanlee's supplies since March 2025. The longest lasted 14 hours. Every outage, with how long it lasted: Linden 1 Reservoir and Linden 2 Reservoir.
JW's end dates
JW posted 11 notices with an end date that list a suburb or system Jacanlee'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 20 end times that have passed. Each end date against what happened: Linden 1 Reservoir and Linden 2 Reservoir.
Under strain
In 2026 so far, Jacanlee had 21 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. Jacanlee 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.