South Africa

What the record shows

In the South African record the instrument usually works. What it distributes is the problem. In four separate entries an independent or peer-reviewed source establishes that the benefit followed the country's older map of who lives where. That is not a complaint about the technology; it is the most consistent measured finding this record contains, and none of it is ours — each instance was established by an auditor, a court or a university.

The clearest case is also the one that saved lives. Cape Town owns a pumped-storage scheme in the mountains above Gordon's Bay, built in 1979, and from June 2015 used it to hold its own electricity customers one stage below the national load-shedding stage — sometimes two, occasionally none at all. The mechanism is dispatch rather than sensing: turbines run through the evening peak and pump the water back overnight, shaving enough demand that the City can shed less than the national utility orders. An independent synthetic-control study estimates that this averted roughly 547 premature deaths among City-supplied residents aged 65 and over between 2015 and 2019, on a wide confidence interval its author is careful about. The same study reports that 81 per cent of Cape Town's white residents live in the protected City-supplied areas, against 27 per cent of its black African residents. Nothing about the scheme was smart, and the relief followed apartheid-era supply lines rather than need. It also stopped at the billing boundary: the City distributes about 70 per cent of the metro's electricity, and the national utility rejected its 2023 bid to buy out the areas it supplies directly.

Day Zero is the entry everyone knows, and the famous number was not the binding one. From 2015 the City published a weekly dashboard and named a threshold of 13.5 per cent combined dam storage at which taps would close and residents would queue — and that date actuated nothing. It was recalculated weekly and moved with judgement and rainfall. The reading that automatically produced a consequence was the household meter: from February 2018 a target of 50 litres per person per day, penalties above a monthly household ceiling, and a water management device that physically shuts off supply once a daily allocation is used. By March 2018 roughly 250,000 were installed, 64 per cent of them in indigent areas rather than in the high-consuming suburbs — while a study in Nature Sustainability found that on 2020 census data the elite and upper-middle-income 13.7 per cent of the population used 51 per cent of Cape Town's household water. Consumption did fall hard, from about 1.2 billion litres a day in 2015 to 511 million in March 2018, and Day Zero never came. By February 2026 the city was drawing more than a billion litres a day again, above its own summer target. The dashboard survives; the saving did not.

The pattern repeats wherever a scheme requires an asset to join it. Cape Town buys surplus rooftop solar back from customers on its own network, and once a bill reaches zero the remaining credit can be paid out as actual cash — a genuinely new answer to who gets money out of a meter. Uptake stays narrow, at 1,842 sellers as at January 2025, and the requirements explain why: an owned roof, capital for an array, an approved bidirectional meter and a City account. A peer-reviewed national study published in 2025 found South African rooftop solar concentrated overwhelmingly in wealthy, historically white suburbs. A buy-back tariff moves money upward unless it is paired with something that puts panels on the roofs that do not have them.

Then there is the network nobody can audit. Vumacam is a private company, not a city programme: since 2019 it has mounted cameras on its own poles across Johannesburg and neighbouring municipalities and sold access by subscription to private security firms and residents' associations, with plate readers beside overview cameras — by its own account more than 7,000 public-space cameras performing about 12 million plate reads a day. Every other camera network in this atlas can in principle be audited by whoever owns it. This one cannot. A private company chose the streets, set the price, wrote the access rules and holds the footage; South Africa has no statute governing public-space cameras; the city's roads agency tried to stop issuing pole permits on privacy grounds and lost in the High Court in 2020, and a 2025 by-law requiring registration of private cameras overlooking public space was challenged and withdrawn before any court ruled. The Information Regulator has been examining the company since 2020 without publishing a finding. Ownership drew the map too: the strongest independent examination found the cameras massed in affluent suburbs and absent from Soweto because it is poor.

Johannesburg supplies the record's least glamorous and most transferable lesson. Its water utility is fitting exactly the toolkit that worked elsewhere — smart pressure controllers, acoustic noise loggers on critical pipelines, hydraulic controls that throttle reservoir outlets automatically at night to cut minimum night flow and rebuild storage before morning, two staffed control rooms. Its own annual report put non-revenue water at 46.2 per cent. The Auditor-General found losses above the national 30 per cent norm for four straight years and notified the city of a material irregularity in December 2024, blaming deferred maintenance rather than missing sensors. This is the same pressure-zone and night-flow architecture that took Istanbul from 22.3 to 18.6 per cent, fitted here to a network whose losses grew while the work was under way. Telemetry sets the repair priority; it does not do the repair. The quieter counterweight is Cape Town's municipal fibre, roughly 848 km of open-access cable the city wholesales to private providers rather than selling broadband directly — infrastructure held as a public asset. Its data catalogue is the same instinct one step short: a policy, revised twice, that names no licence and points at a municipal terms page instead. If the entries below agree on one lesson, it is that South Africa is unusually good at measuring who its systems reached — and that the answer keeps coming back the same.