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Greenstone Hill

Last Johannesburg Water (JW) report: Mon 26 May 2025, 21:45

JW has not reported Greenstone Hill's supplies on its status boards this year.

Modder HillWater as normal

JW lists Greenstone Hill under both supplies and does not say which streets each one reaches.

ShareJW's updates ↗

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

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 Greenstone Hill's 2 supplies short of water on 0 days

3 March 2025 to 29 September 2026, from 41 days with a JW report.

Modder Hill Reservoir

Mar3 Mar: supplying adequately4 Mar: no report5 Mar: supplying adequately6 Mar: supplying adequately7 Mar: supplying adequately8 Mar: supplying adequately9 Mar: supplying adequately10 Mar: no report11 Mar: supplying adequately12 Mar: supplying adequately13 Mar: supplying adequately14 Mar: supplying adequately15 Mar: no report16 Mar: no report17 Mar: supplying adequately18 Mar: supplying adequately19 Mar: supplying adequately20 Mar: supplying adequately21 Mar: no report22 Mar: no report23 Mar: no report24 Mar: supplying adequately25 Mar: supplying adequately26 Mar: supplying adequately27 Mar: supplying adequately28 Mar: no report29 Mar: no report30 Mar: no report31 Mar: no report0
Apr1 Apr: supplying adequately2 Apr: supplying adequately3 Apr: supplying adequately4 Apr: supplying adequately5 Apr: no report6 Apr: no report7 Apr: supplying adequately8 Apr: no report9 Apr: supplying adequately10 Apr: no report11 Apr: supplying adequately12 Apr: no report13 Apr: no report14 Apr: no report15 Apr: no report16 Apr: no report17 Apr: supplying adequately18 Apr: no report19 Apr: no report20 Apr: no report21 Apr: no report22 Apr: supplying adequately23 Apr: no report24 Apr: no report25 Apr: supplying adequately26 Apr: no report27 Apr: no report28 Apr: supplying adequately29 Apr: supplying adequately30 Apr: supplying adequately0
May1 May: supplying adequately2 May: no report3 May: supplying adequately4 May: no report5 May: supplying adequately6 May: supplying adequately7 May: no report8 May: no report9 May: supplying adequately10 May: supplying adequately11 May: supplying adequately12 May: supplying adequately13 May: no report14 May: no report15 May: no report16 May: no report17 May: no report18 May: no report19 May: no report20 May: no report21 May: no report22 May: no report23 May: supplying adequately24 May: no report25 May: no report26 May: supplying adequately27 May: no report28 May: no report29 May: no report30 May: no report31 May: no report0
JunNo JW boards, Jun 2025 to Sep 2026

RW1963 Direct Feed

MarNo JW boards, Mar 2025 to Sep 2026
  • 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 Greenstone Hill's 2 supplies short of water on 0 days”. Data release 2026-09-29-318d9dca. https://watersearch.co.za/suburb/greenstone-hill#fig-year

The data as a table
SupplyMonthDays reportedDays in recordAdequate or fairPoor pressure in places, or lowWarning: no water may occurPoor pressure to no waterCritically lowOvernight closure
Modder Hill ReservoirMarch 202518291800000
Modder Hill ReservoirApril 202513301300000
Modder Hill ReservoirMay 202510311000000
Modder Hill ReservoirJune 2025030000000
Modder Hill ReservoirJuly 2025031000000
Modder Hill ReservoirAugust 2025031000000
Modder Hill ReservoirSeptember 2025030000000
Modder Hill ReservoirOctober 2025031000000
Modder Hill ReservoirNovember 2025030000000
Modder Hill ReservoirDecember 2025031000000
Modder Hill ReservoirJanuary 2026031000000
Modder Hill ReservoirFebruary 2026028000000
Modder Hill ReservoirMarch 2026031000000
Modder Hill ReservoirApril 2026030000000
Modder Hill ReservoirMay 2026031000000
Modder Hill ReservoirJune 2026030000000
Modder Hill ReservoirJuly 2026031000000
Modder Hill ReservoirAugust 2026031000000
Modder Hill ReservoirSeptember 2026029000000
RW1963 Direct FeedMarch 2025029000000
RW1963 Direct FeedApril 2025030000000
RW1963 Direct FeedMay 2025031000000
RW1963 Direct FeedJune 2025030000000
RW1963 Direct FeedJuly 2025031000000
RW1963 Direct FeedAugust 2025031000000
RW1963 Direct FeedSeptember 2025030000000
RW1963 Direct FeedOctober 2025031000000
RW1963 Direct FeedNovember 2025030000000
RW1963 Direct FeedDecember 2025031000000
RW1963 Direct FeedJanuary 2026031000000
RW1963 Direct FeedFebruary 2026028000000
RW1963 Direct FeedMarch 2026031000000
RW1963 Direct FeedApril 2026030000000
RW1963 Direct FeedMay 2026031000000
RW1963 Direct FeedJune 2026030000000
RW1963 Direct FeedJuly 2026031000000
RW1963 Direct FeedAugust 2026031000000
RW1963 Direct FeedSeptember 2026029000000

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 26 May 2025; the site last read JW's website on 1 October 2026. Modder Hill Reservoir had water as normal. Greenstone Hill gets its water from a reservoir and a direct feed. JW has not reported Modder Hill Reservoir and RW1963 Direct Feed this year.

Latest JW report

No JW report since 26 May 2025. Modder Hill Reservoir, 26 May 2025: water as normal at 21:45 (JW: “Supplying normal”).
JW put it on its website 27 May 2025 at 13:23. JW's post ↗ · JW's image of the board ↗

RW1963 Direct Feed: JW has not reported it on any status board we have read.

Also on OurPower ↗.

Where Greenstone Hill gets its water

Greenstone Hill draws on two supplies at once: Modder Hill Reservoir and RW1963 Direct Feed. JW does not say which street each one reaches.

SupplySystemHow JW links it to Greenstone Hill
Modder Hill ReservoirListed on JW's pages, as Greenstone Hill Ext.10, Greenstone Hill Ext.11, Greenstone Hill Ext.12, Greenstone Hill Ext.13, Greenstone Hill Ext.14, Greenstone Hill Ext.15, Greenstone Hill Ext.16, Greenstone Hill Ext.17, Greenstone Hill Ext.18, Greenstone Hill Ext.19, Greenstone Hill Ext.21, Greenstone Hill Ext.22, Greenstone Hill Ext.30, Greenstone Hill Ext.31, Greenstone Hill Ext.7, Greenstone Hill Ext.8, Greenstone Hill Ext.9. Source 1 ↗ Source 2 ↗
RW1963 Direct FeedListed on JW's pages, as Greenstone Hill Ext.13, Greenstone Hill Ext.14, Greenstone Hill Ext.15, Greenstone Hill Ext.16, Greenstone Hill Ext.17, Greenstone Hill Ext.19, Greenstone Hill Ext.20, Greenstone Hill Ext.22, Greenstone Hill Ext.24, Greenstone Hill Ext.27, Greenstone Hill Ext.28, Greenstone Hill Ext.30, Greenstone Hill Ext.31, Greenstone Hill Ext.32, Greenstone Hill Ext.33, Greenstone Hill Ext.34, Greenstone Hill Ext.35, Greenstone Hill Ext.36, Greenstone Hill Ext.6. Source 1 ↗

Outages

JW reported no outage on these supplies since March 2025. Every outage, with how long it lasted: Modder Hill Reservoir and RW1963 Direct Feed.

JW's end dates

JW posted 3 notices with an end date that list a suburb or system Greenstone Hill'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 2 end times that have passed. Each end date against what happened: Modder Hill Reservoir and RW1963 Direct Feed.

Under strain

In 2025, Greenstone Hill had 0 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. Greenstone Hill 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:

Source: JW's System Update boards and notices, read by us. The full list, and how this record is made.