Three years later, the sewer still fouling humanity's cradle; and voters get their say on Wednesday

Why is raw sewage still flowing through a World Heritage Site?

Three years after he first reported that a sewer was running through the Cradle of Humankind, Daily Maverick journalist Ed Stoddard returned and found the same cesspool. His report, published November 2, 2026, two days before South Africa's municipal elections, describes a UNESCO World Heritage Site in the heart of Gauteng still being treated, in his words, like a latrine. The source has not changed: the collapsed Percy Stewart Wastewater Treatment Plant and the failed pump stations at Munsieville and Brickvale, in Mogale City on Johannesburg's West Rand.

The timing is the story. With polls on Wednesday, November 4, the unchanged Blaaubankspruit becomes a report card on the ANC-led coalition running Mogale City. Trevor Brough, a community activist and member of the Cradle of Humankind World Heritage Site Association, put it plainly: "The outflow from Percy Stewart has been problematic for 10 years, and that hasn't changed." His late-September monitoring found the Munsieville pump station offline for four days after an electrical failure, sewage running down the street into the Blougat Spruit; which feeds the Blaaubankspruit, flowing past the Sterkfontein Caves and their fossil record of human evolution.

Mogale City's last press release on the matter dates to October 17, 2024, two years ago, issued only after President Cyril Ramaphosa publicly raised concerns. Since then, radio silence, despite residents' constant complaints. Attempts to reach the city before publication went unanswered.

What the official audit trail says about Mogale City's waterworks

The national audit record backs the reporting. The Department of Water and Sanitation's Green Drop assessment, the benchmark for wastewater treatment works, scored Mogale City below 30% in 2025, critical status, down from 75% in 2013 and 65% in 2021: the largest regression in Gauteng. All three treatment works are critical, Flip Human 30%, Percy Stewart 30%, Magaliesburg 27%, and the city scored 0% for microbiological and chemical compliance.

The failure is structural: twelve of the city's 14 sewerage pump stations were found non-functional, so much sewage never reaches the works. A 2024 CSIR water resources report identified Percy Stewart as the primary threat to the Cradle site, with E. coli consistently above 2,419 per 100ml downstream; far past the "extreme high risk" threshold of 1,000. The department issued a Red Regulatory Notice and demands full compliance by mid-2027. The problem began in 2019 through a lack of management and maintenance, and one long-time observer says the plant has effectively pumped raw sewage into the river for 15 years.

The gaps no monitoring report has closed

Whether the mid-2027 compliance deadline will be met; or join the earlier deadlines that passed while the outflow continued. What the repair money has bought: R64 million is earmarked for Percy Stewart's upgrade and R11 million went to refurbishing five pump stations, yet independent tests still find dangerous E. coli at the outlet, and the municipality's own councillors concede the plant still breaches environmental law. The long-term damage is unquantified; the CSIR classifies river sections as biologically dead, springs show groundwater contamination, and nobody has published a full accounting of what sewage infiltration means for the fossil cave systems. And whether Wednesday's vote changes anything: water infrastructure turns over in years, not electoral cycles.

A heritage site, a river system, and an election all turn on one plant

The Cradle of Humankind holds the largest known concentration of human ancestral remains anywhere on earth. World Heritage status carries obligations to the continent and to world science; and a site treated as a latrine for years is a measure of institutional failure that travels far beyond one municipality, even as Africa showcases what it protects, as Senegal opens Africa's first Olympic Games this week.

The toll is economic and human. Brookwood Trout Farm on the Blaaubankspruit went from nine employees to two, weekend visitors from 400 to barely 40; trout, the indicator species of a healthy stream, are gone. For farmers, CSIR findings mean E. coli and toxins potentially contaminating irrigation soil; for 440,000 Mogale City residents, a benchmark audit in the critical band and a regulatory red notice. And the ballot: municipal elections are the one moment service delivery is priced in votes. The sewage in the Cradle has become the legible symbol of a wider water crisis; one that drew a presidential intervention, a human-rights commission inquiry, and provincial appeals for forced compliance.

Local government failure as a systems problem, not a plumbing problem

This is not a story about a broken pump. It is about maintenance as governance, the unglamorous discipline separating a functioning state from a failing one. Percy Stewart decayed over a decade and a half of deferred maintenance while Green Drop scores slid from 75% to below 30%. The single press release in two years came in response to the president's displeasure, not residents' complaints, the signature of a system where accountability arrives only from above, now the subject of a SAHRC inquiry into the Gauteng water crisis.

The geopolitics are quieter but real. Heritage status is soft sovereignty: international recognition that a place belongs to humanity's shared record. South Africa has spent the year projecting authority abroad; including at the UN, where a 35-year peacekeeping mission is being liquidated, and where Rabat is reading the fall of the UN's Sahara mission as a diplomatic verdict, while basic infrastructure rots at home. Citizens notice the gap. And the development-economics reading: R64 million earmarked, "significant progress" claimed, rivers still effectively dead, capital spending without operational discipline. When official claims and independent measurements diverge this sharply, the measurement is the story.

What follows when a municipality becomes a pollution source

Contaminated groundwater threatens the fragile dolomitic cave systems whose chemical stability preserves the fossil record; sewage infiltration degrades the archive of the deep past, and no full accounting of that risk exists. Downstream, the Crocodile River carries the load to Hartbeespoort Dam, spreading liability to farmers, residents and ecosystems with no part in Mogale City's decisions. The health dimension could force the issue faster than any audit: communities using these sources for drinking, bathing and irrigation face waterborne-disease exposure, and the SAHRC inquiry frames the crisis in rights the municipality cannot deflect.

Politically, the precedent reaches beyond Gauteng. If Wednesday's voters punish the coalition that presided over the befouling, every struggling municipality learns water infrastructure is an electoral liability. If they do not, the lesson is darker: documented, audited, years-long failure carries no ballot cost. And for the heritage world, an uncomfortable question usually reserved for war zones: at what point does a World Heritage Site's custodian become its threat?

What would it take to fix the Percy Stewart plant?

South Africans vote Wednesday, November 4, and Mogale City's voters deliver their verdict on the ANC-led coalition. Beyond the ballot: the water department's mid-2027 compliance deadline, the R64 million upgrade programme, the DA's appeal to the provincial cooperative-governance MEC for enforced compliance, and the Gauteng-led Cradle management forum as the institutional venue. Watch for resumed public reporting after the election silence, independent E. coli tests at the outlet, extension of pump-station refurbishment beyond the five units done, and whether the SAHRC inquiry produces enforcement with teeth. The monitoring continues regardless; the rivers keep the most honest ledger.