By Shah Nasir Khisro
For generations, the concept of cleanliness has been understood largely in terms of personal hygiene and household cleanliness. People ensure their homes are clean, their surroundings orderly, and their personal hygiene maintained. However, what happens to human waste after it leaves the household has often remained outside public concern. This limited perception has shaped sanitation policies across the world for centuries.Historically, societies believed that once waste left the household, responsibility for it ended. As a result, waste was frequently discharged into streets, drains, rivers, or open spaces without considering its broader impact on public health and the environment. Cities grew, populations increased, and sanitation challenges multiplied.A famous historical example comes from London in the nineteenth century. Rapid urban expansion overwhelmed the city’s sanitation infrastructure, leading to the infamous Great Stink of London. During that period, untreated sewage accumulated in the River Thames, producing unbearable odors and triggering serious health concerns, including outbreaks of Cholera. The crisis forced authorities to recognize that sanitation was not merely a household issue but a matter of collective responsibility requiring organized systems.In recent decades, global efforts to improve sanitation have focused primarily on building toilets and eliminating open defecation. International organizations such as UNICEF and the World Health Organization have supported governments worldwide through initiatives monitored under the Joint Monitoring Programme for Water Supply, Sanitation and Hygiene.These initiatives have produced remarkable progress. Millions of households now have access to improved sanitation facilities, bringing dignity, safety, and privacy—especially for women and children. The reduction in open defecation has been a major achievement in the global public health agenda.However, experience from many countries has revealed an important reality: toilets alone do not guarantee safe sanitation.In many cities across South Asia and other developing regions, toilets are connected to septic tanks or pit latrines that require periodic emptying. Without proper waste management systems, the collected sludge is often dumped untreated into drains, rivers, or open land. This practice simply transfers waste from the household environment to the public environment.Cities such as Dhaka in Bangladesh and major urban centers including Karachi and Lahore illustrate this challenge. While sanitation coverage has improved, large volumes of human waste remain untreated and poorly managed, posing risks to both public health and ecosystems.This experience highlights a crucial lesson: a toilet is only the beginning of the sanitation journey, not its final destination.Today, sanitation practitioners increasingly emphasize the need for comprehensive sanitation management, which addresses the entire sanitation chain. This includes safe containment of waste in toilets, hygienic emptying of pits and septic tanks, safe transport of sludge, treatment of wastewater, and finally the safe disposal or reuse of treated waste.This approach is often referred to as Citywide Inclusive Sanitation (CWIS), which aims to ensure that all people—regardless of where they live—benefit from safe and sustainable sanitation services.Encouraging examples are emerging from several countries. Cities in Bangladesh such as Khulna and Faridpur have introduced structured fecal sludge management systems. Municipal authorities regulate desludging services and operate treatment facilities to ensure that waste collected from households is properly processed rather than discharged untreated into the environment.These experiences demonstrate that the effectiveness of sanitation systems depends not only on infrastructure but also on management, regulation, and institutional coordination.Sanitation management provides multiple benefits. Proper treatment of human waste helps prevent the spread of waterborne diseases and protects drinking water sources. It safeguards rivers, lakes, and groundwater from pollution. It also reduces healthcare costs and improves productivity by creating healthier living environments. In addition, modern sanitation technologies can transform waste into useful resources such as compost, energy, or treated water for agriculture.Despite these benefits, one of the major challenges in many countries is fragmented institutional responsibility. Often, different agencies are responsible for different parts of the sanitation chain—one agency for water supply, another for sewerage, and yet another for environmental regulation. This fragmentation weakens accountability and leads to ineffective sanitation systems.To overcome this challenge, countries need a clear institutional framework with strong leadership and technical oversight. In many contexts, the Public Health Engineering Department (PHED) is well positioned to play this role. With its technical expertise and engineering capacity, PHED can serve as the central authority responsible for planning, supervising, and regulating sanitation management systems.Municipal governments, private service providers, and community organizations can deliver sanitation services on the ground. However, a central technical authority such as PHED can ensure that these services operate within a coordinated system, maintaining standards and protecting public health.The global sanitation journey has evolved from focusing on personal hygiene to building toilets and now toward managing entire sanitation systems. The lesson from history and modern experience is clear: sanitation is not achieved when a toilet is built, but when human waste is safely managed from containment to treatment and safe disposal or reuse.For countries striving to improve public health and environmental sustainability, the next step is clear. The focus must shift from isolated infrastructure projects to integrated sanitation management systems supported by strong institutions, effective regulation, and long-term planning.Only through such a shift can societies create cleaner environments, healthier communities, and a sustainable future for generations to come.
