Access to safe water and sanitation is a basic human right. Sanitation refers to having access to a proper sanitary sewerage system through a house connection, as well as a proper stormwater drainage system and safe excreta and wastewater disposal (ISO 2018). United Nations put the first global level commitment toward safe water; sanitation and hygiene (WASH) in Millennium Development Goals (MDGs) (von Schirnding 2002). Target 7C of MDG has planned to reduce the number of people without access to sanitation by half (Bartram, Lewis et al. 2005, Editorial 2008). The goal was partially achieved as 1.9 billion people gained access to improved sanitation between 1990 and 2015, equivalent to more than 200,000 people every day (Mara and Evans 2018). Following MDG, the second and more comprehensive global effort to tackle the sanitation issue is the Sustainable Development Goals (SDGs) (UNICEF 2017).
Goal#6 of SDG is the provision of safe drinking water and sanitation for everyone. The rapid decrease in ending open defecation and providing basic sanitation was achieved through a massive increase in onsite sanitation (OSS) technologies especially in low and middle-income countries (Water 2021). OSS includes flush/non-flush toilets connected to a septic tank, aqua privy, composting toilets, single or double pit latrine, etc. (Franceys, Pickford et al. 1992). Lack of sanitation contributes to 10% of the global disease burden, mainly causing diarrheal diseases. To achieve equitable sanitation, quadrupled-paced improvement is required as one-third of the world’s population still needs basic toilet facilities (WHO 2020). The current COVID-19 pandemic has highlighted the need for access to safely managed sanitation as fecal excreta contains COVID-19 RNA that can be transferred to others if it is not properly managed (Sangsanont, Rattanakul et al. 2022, Wang, Liu et al. 2022).
Huge economic implications exist for countries that fail to address safe sanitation. According to the World Bank, 165 million children globally under the age of five are trapped in poverty and living under substandard sanitary conditions. Children living in places near open defecation are 11% more likely to have stunted growth (Mansuri, Sami et al. 2018). The importance of sanitation can be assessed that for every dollar spent in sanitation, there is a return of US $5.50 in lower health costs (Nishat 2013). The stark inequalities between different regions and classes further complicate the issue. The differences exist between the global south and global north and between the rural and urban areas. About 75% of the rural population lack improved sanitation (WHO/UNICEF 2021).
About 52% of households in rural areas of Pakistan do not have any sanitation system as compared to only 8% of households in urban areas (Khan, Fatima et al. 2021). Since 2000, Pakistan is among the 16 countries that have reduced open defecation by more than 20% yet 16 million people still practice open defecation (Ababa 2016). The impact of the unavailability of safe sanitary facilities is directly affecting the lives of people, especially in slums and informal settlements in Pakistan. Every year 94,000 people including 53,000 children under five die from diarrhea due to poor quality of water and sanitation (WHO/UNICEF 2021, Ali, Abbas et al. 2022).
According to a recent survey by the Pakistan Bureau of Statistics (PBS) on Pakistan Social and Living Standards Measurement (PSLM) 2019-20, toilets are divided into three main categories, Flush, Non-Flush, and No Toilet. Flush toilets (an improved form of a toilet) connect to either a sewerage system, septic tank, pit, or an open drain. Around 83% of households all over Pakistan have Flush toilet facilities out of which 27% are connected with sewerage, 21% have septic tanks, 17% have pit latrines, and 18% have open drains (PBS 2021). Currently, non-networked on-site sanitation systems are the predominant form of sanitation systems in the country. In Pakistan, 43 million people living in urban areas have access to sewer networks, and only 7 million in rural areas. A complete shift can be seen in the use of OSS as 52 million people in the rural areas use a septic tank and only 13 million people in urban areas (WHO/UNICEF 2021). The fate of fecal sludge generated by the OSS is unknown as no policy or guidelines regarding fecal sludge management exists in Pakistan. During PSLM 2019-20 survey, it was revealed that 62% of the OSS are never emptied and 13% of users do not even know about emptying. Only 4% have emptied within the last 5 years and 16% replace the OSS when it becomes full (PBS 2021).
OSS is considered a relatively inexpensive system for the treatment of excreta and wastewater generated in the household for the public sector but puts more responsibility on the user and service providers (Dodane, Mbéguéré et al. 2012, Beard, Satterthwaite et al. 2022). OSS require a proper management scheme termed as Fecal Sludge Management (FSM). The FSM service chain includes the containment, collection, transportation, treatment, and disposal of fecal sludge from the on-site sanitation systems. The sludge that accumulates in the OSS needs to be regularly removed and treated before safe disposal (Strande, Englund et al. 2021). The collection, emptying, and treatment of on-site sanitation is undeveloped in Pakistan and the collected fecal sludge is disposed of untreated in the environment. In Pakistan, a major focus has only been on containment, and the service chain of collection, treatment, and safe disposal is completely missing (Sarbagya Shrestha 2019). The concentrations, quantities, and consistency of fecal sludge are highly variable (Strande, Ronteltap et al. 2014). The quantities and qualities of fecal sludge accumulated in the OSS depend upon many demographic, technical and technical parameters. These include water availability for cleaning, dietary habits of the individuals, sludge storage space availability, type of infrastructure built for storage and storage time in the OSS, and type of water entering in the OSS (Blackwater only and/or mixed with greywater (Strande, Schoebitz et al. 2018). Thus, a local scenario investigation is always required the identify the stakeholder, local practices followed, the weak links of safe sanitation, and how they can be addressed.
FSM in Pakistan needs implementation after planning and coordination between the different stakeholders involved, i.e., households, desludging service providers, the city administration, Non-Governmental Organizations (NGOs), Environmental Protection Agency (EPA), Water and Sanitation Authorities (WASA), Public Health Engineering Department (PHED), etc. In Pakistan, the institutional framework is present but particular attention is given to sewerage networks and FSM does not get due attention. The infrastructure for the service chain is missing even though the majority of the population uses OSS (CDA 2008). In Pakistan the information available on wastewater and treatment is scarce. Data related to sanitation and especially OSS is completely missing. Thus, the performance of the currently available OSS cannot be gauged.
The objective of this work is to get a first-hand view of the situation of fecal sludge management in Pakistan. Primary data was collected from KII with officials who overlook the sanitation situation in different cities of Pakistan. Data from primary and secondary sources were used to assess the sanitation situation in three major cities of Pakistan i.e. Karachi, Lahore, and Islamabad. The cities were selected to represent the major provinces of Pakistan and their demographic profiles. Shit flow diagrams (SFD) were developed and Modified Service Delivery Assessment (SDA) was assessed on information gathered from primary and secondary sources. This helps in understanding the gravity of the sanitation situation in major cities of Pakistan and advocating for the redressal of the issue. The weakness in the existing legislation and infrastructure are also highlighted.