What Cyclospora and Sewer Overflows Tell Us About Infrastructure
Cyclospora and sewer overflows may seem like two very different subjects, but both bring us back to an important question: how well are we protecting the boundary between wastewater and the environment? The recent attention surrounding Cyclospora has brought food safety and environmental contamination back into the public conversation. As often happens when an outbreak occurs, the first questions focus on the immediate source: what food was involved, where it came from, and how contamination may have happened. Those are necessary questions, but they are not the only ones worth asking.
Cyclospora cayetanensis is a microscopic parasite associated with fecal contamination. People can become infected by consuming contaminated food or water, which makes the separation of wastewater from the surrounding environment especially important. That does not mean sewer overflows are responsible for the current Cyclospora outbreak, and it would be misleading to suggest that they are. What the subject does highlight, however, is a broader reality: once untreated wastewater escapes the systems designed to contain it, the consequences can extend well beyond a utility department.
Wastewater systems are often taken for granted precisely because, when they work properly, they remain largely invisible. Sewage is collected, transported, treated, and safely managed without most people ever having to think about the process. During periods of intense rainfall, however, those systems can come under enormous pressure. Stormwater may enter sanitary sewers through aging infrastructure, damaged connections, manhole openings, pick holes, and other sources of inflow and infiltration. Individually, these entry points may seem insignificant. Across an entire collection system during a major storm, they can represent a substantial volume of water.
That additional water matters because sanitary sewer systems were built primarily to transport wastewater, not rainwater. Every gallon of stormwater that enters the network must still be conveyed, pumped, and treated. As flows increase, available capacity decreases. In extreme conditions, the result can be backups, operational strain, and sanitary sewer overflows that release untreated wastewater into areas where it does not belong.
This is where the conversation becomes larger than sewer maintenance. An overflow is not simply an engineering inconvenience or an unexpected operating expense. It is a failure of containment. Wastewater that was supposed to remain inside a controlled system has entered the surrounding environment. Depending on where and how that occurs, it can affect waterways, recreational areas, soil, and other environments that communities depend on.
For that reason, preventing unnecessary water from entering sanitary sewer systems deserves more attention. Much of the traditional infrastructure conversation begins after water has already entered the system: whether additional pumping capacity is needed, whether treatment plants should be expanded, or whether more storage should be built. Those investments can be essential, particularly in growing communities and older sewer systems. At the same time, there is value in asking a simpler question earlier in the process: how much of this water could have been prevented from entering the sanitary sewer in the first place?
Rainwater does not need to be treated as sewage. Yet when stormwater enters a sanitary sewer, municipalities must spend energy, capacity, and operating dollars moving and treating water that should never have been there. Reducing that unnecessary inflow does not eliminate every cause of sewer overflows, but it can help protect the capacity already available within the system, particularly during the heavy rain events when that capacity is most valuable.
Manholes are one example of an infrastructure component that is easy to overlook. They are among the most visible elements of a sewer system, yet during rainfall they can also become points where surface water enters the network. The challenge is not simply to seal a manhole completely. Sanitary sewer systems need ventilation, and restricting airflow can create other operational concerns, including the accumulation of gases such as hydrogen sulfide. Effective inflow control therefore requires a balance between limiting unwanted stormwater and maintaining the conditions necessary for the sewer system to function properly.
This is the problem Sewer Sentry was designed to address. Its patented manhole technology reduces stormwater inflow while maintaining sewer ventilation. The concept is straightforward: prevent unnecessary water from entering the sanitary sewer at one of its potential entry points rather than paying to manage that same water later in the system. It is not a replacement for treatment, pipe rehabilitation, system maintenance, or other infrastructure investments. It is one part of a broader approach to reducing strain on collection systems.
The connection to Cyclospora is therefore not about claiming that a particular product prevents a particular disease. The more important lesson is that environmental health depends, in part, on keeping wastewater where it belongs. Cyclospora is simply one reminder of why fecal contamination matters and why the infrastructure designed to contain human waste should be treated as a public-health asset, not merely a municipal utility.
There is also a larger shift taking place in how communities think about infrastructure. For decades, the answer to growing demand has often been to build more capacity: larger pumps, expanded treatment plants, additional storage, and major rehabilitation projects. Those solutions remain necessary in many places. But resilience can also come from reducing the burden placed on existing systems. Preventing thousands or millions of gallons of stormwater from entering a sanitary sewer can sometimes be just as important as increasing the system’s ability to process that water after it arrives.
As communities face heavier rainfall, aging infrastructure, tighter budgets, and increasing demands on wastewater systems, this distinction becomes more important. The question is no longer only how much water a sewer system can handle. It is also how much unnecessary water can be kept out.
Cyclospora may be the issue drawing attention today, but the broader challenge has been with us for decades. Protecting public health and the environment requires reliable wastewater systems, effective treatment, responsible maintenance, and thoughtful prevention. Much of that work happens underground and goes unnoticed.
When it works well, that is exactly the point.