Cape Town’s sewer infrastructure is under constant strain, and failure is not a theoretical risk. Sewer overflows threaten public health, damage ecosystems and contaminate beaches, rivers and communities. To reduce this risk, the City of Cape Town has placed much of its sewer pump station network under continuous digital surveillance using a 24/7 high-tech telemetry monitoring system designed to detect faults before they escalate into environmental incidents.
The City’s Water and Sanitation Directorate currently monitors 404 of the city’s 487 sewer pump stations in real time. The system, which has been in place since 2021, operates alongside routine physical inspections by maintenance teams and provides an early-warning layer that allows officials to respond to problems before overflows occur.
Each monitored pump station is fitted with a telemetry unit connected to its control panel. These devices continuously track flow volumes, operational behaviour and data patterns. When irregularities are detected — including rising wet well levels, pump trips or signs of system failure — alerts are automatically sent to maintenance officials via cellphone for immediate investigation.
Supporting this network is the City’s digital control room, which operates 24 hours a day. The hub monitors telemetry alarms from 404 sewer pump stations, 76 water pump stations and 79 reservoirs, while coordinating service requests and dispatching repair teams to maintenance depots across Cape Town. The focus is rapid response: identify faults early, allocate resources quickly and prevent infrastructure failures from becoming public or environmental crises.
On the ground, pump station maintenance teams have intensified preventative measures, including more frequent wet well cleaning. Standby teams are available to respond to emergencies at any hour, and a dedicated 24/7 spill mitigation unit has been established to contain failures swiftly and limit environmental damage — particularly at pump stations located near beaches and sensitive coastal areas.
However, City officials stress that infrastructure and technology alone cannot eliminate risk. Illegal dumping of foreign objects into the sewer system remains a major cause of blockages and pump failures. Items such as wipes, plastics and sanitary products routinely compromise systems, triggering avoidable overflows.
Mayoral Committee Member for Water and Sanitation, Councillor Zahid Badroodien, said public cooperation remains critical. “Preventing sewer overflows is not only about technology and maintenance. Responsible waste disposal plays a major role in protecting our sewer infrastructure, our coastline and our communities.”
The City says its approach reflects a broader commitment to proactive planning, rapid response and environmental protection. Early detection, coordinated monitoring and public responsibility are central to keeping Cape Town’s water and sanitation systems functioning reliably — and preventing infrastructure failures from turning into public health and environmental emergencies.
