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: 0 days short of water for Marlboro Reservoir, from 189 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 Marlboro Reservoir short of water on 0 days
3 March 2025 to 29 September 2026, from 282 days with a JW report.
11531short
2025
Mar0
Apr0
May0
Jun0
Jul3
AugNo JW boards, Aug 2025 to Jan 2026
2026
Feb0
Mar0
Apr0
May0
Jun0
Jul0
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 Marlboro Reservoir short of water on 0 days”. Data release 2026-09-29-318d9dca. https://watersearch.co.za/suburb/marise-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
13
30
13
0
0
0
0
0
May 2025
11
31
11
0
0
0
0
0
June 2025
28
30
28
0
0
0
0
0
July 2025
23
31
16
3
0
1
2
1
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
7
0
0
0
0
0
March 2026
21
31
19
2
0
0
0
0
April 2026
30
30
30
0
0
0
0
0
May 2026
31
31
29
2
0
0
0
0
June 2026
30
30
30
0
0
0
0
0
July 2026
30
31
30
0
0
0
0
0
August 2026
20
31
20
0
0
0
0
0
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. Marlboro Reservoir had water as normal. JW did not report it short of water this year. On Marlboro Reservoir, its last 2 outages lasted 20 hours and at least 36 hours; the longest since March 2025 lasted at least 36 hours.
JW reported 2 outages on Marise AH's supply since March 2025. The longest lasted at least 36 hours. Every outage, with how long it lasted: Marlboro Reservoir.
JW's end dates
JW posted 22 notices with an end date that list a suburb or system Marise 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 15 end times that have passed. Each end date against what happened: Marlboro Reservoir.
Under strain
In 2026 so far, Marise AH had 2 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.