The status of Water, Sanitation, and Hygiene (WASH) in schools in sub-Saharan Africa remains dire. Only 46% have access to basic water services, 44% to basic sanitation services, and 26% to basic hygienic services. Although integrating these services with other water and waste streams could benefit service provision, a systematic methodology for such integration does not exist yet. This research approaches a first step–a methodology for an integrated assessment of water, sanitation, and solid waste management (SWM) services in schools. In addition, a modified version of the Joint Monitoring Program’s WASH service ladder for schools is provided for a detailed understanding of the service levels. A total of 16 schools from two small towns in Uganda are taken as case studies to identify the current service levels, interlinkages between the sectors as well as their enabling environment. Using surveys, stakeholder interviews, observations, and water quality measurements, the results show several cross-contamination pathways leading to exposure of pupils to pathogens. Finance and policies are major inhibitors of positive interlinkages and limited skills and capacities amplify negative interlinkages. The results emphasize the need for a shift toward further integrated planning of the water and waste services in schools and other institutions.

This study reviews the status of access to water supply, sanitation, and solid waste management (SWM) services in Uganda, examining the influence of national government policies, institutional frameworks, and financing mechanisms. It employs a mixed-methods approach, combining qualitative analysis of primary data from key informant interviews with secondary data from systematically reviewed literature, including performance reports, project data from ministries, development partner websites, and peer-reviewed journal articles. The findings reveal persistent challenges related to intersectoral coordination, overlapping roles, policy inconsistencies, stakeholder conflicts, and funding inefficiencies. Water services receive a disproportionately high percentage of funding (over 80%), whereas sanitation and SWM receive significantly less (approximately 5% and 10%, respectively). Regulations advocate for sustainability, but their implementation in small towns remains weak. Policy analysis at the local level suggests a misalignment that prioritizes SWM over individual water and sanitation services. Decentralization empowers local authorities, but successful service delivery depends on robust enforcement of available policies. The analysis of funding and service delivery gaps underscores the need for equitable resource allocation and integrated approaches. The study concludes by emphasizing the need for active engagement by governments, development partners, local communities, and the private sector to achieve equitable access to basic services.

In urbanising areas, siloed planning for water supply, sanitation, and solid waste management impedes sustainable development. This study examines barriers to integrating services in urban Uganda, focusing on Wobulenzi and Kakooge with different service models. A mixed-method approach using qualitative and quantitative data was applied. Document reviews and interviews with 48 stakeholders were conducted. The Problem-Driven Political Economy Analysis framework was used with thematic analysis and quantitative assessment of political economy attributes. Findings showed fragmented institutions, insufficient resources, and poor coordination hinder integration. Small towns face financial constraints, technological gaps, and political interference. Key attributes influencing integration include implementation dynamics (19/20), accountability (12/20), and collaboration (10/20). An enabling political economy is crucial for integrated services in urban Uganda. Addressing fragmented governance through policies, coordination, decentralisation, capacity building, and financing is essential. Realigning resource planning can enable strategic solutions, promote service integration, and ensure sustainable WASH and SWM services.

Climate change, rapid urbanization and other grand challenges increasingly force cities to rethink their urban (water) infrastructure. In particular, decentralized urban water management solutions, which can recover valuable resources close to the source are increasingly applied to remediate water scarcity, sanitation or environmental pollution challenges. Yet, although interesting demonstration projects with decentralized solutions (from here on labeled ‘decentralized UWM solutions’) are underway in several world regions, actors developing and implementing this transformative innovation are not effectively coordinating their efforts and sharing the latest knowledge. While effective technologies, business models, or regulative frameworks increasingly exist that could inform, inspire and improve similar activities elsewhere, details of local successes and failures are still (too) rarely shared or transferred across space. Drawing from experience on the mainstreaming of other transformative infrastructure solutions (like renewable energies, electric mobility or circular waste management), we posit that the global diffusion of decentralized UWM solutions has been significantly slowed down by this lack of interaction among key stakeholders, and the resulting lack of an effective innovation ecosystem.

Building resilience of sanitation systems and services to changing climate is necessary to ensuring continuity of essential sanitation services in the face of hazardous events. An approach towards this solution is to create a robust enabling environment through policies for planning and implementing adaptation measures. The objective of this study is to review the climate change and water and sanitation policies in Nepal to assess the adequacy of the documents in addressing climate resilience in sanitation, with focus on the on-site sanitation. This paper is based on the desk review of existing policy and plan documents related to climate change and water, sanitation, and hygiene (WASH) in Nepal. The review has revealed that sanitation and climate change are addressed only to a limited extent, while focus on on-site sanitation is inadequate. These documents are therefore insufficient to provide guidance to build resilience in sanitation systems and services. The paper concludes that sanitation-specific policies and programmes can tackle the sanitation challenges more effectively and address climate-related vulnerabilities in on-site sanitation systems and services. Enhanced collaboration among different stakeholders can create an environment conducive for policy changes and investments.

The banana tree circle (BTC) is a low-cost system for local greywater management, using a natural treatment and disposal process, providing additional resource recovery benefits. However, there are no standard design criteria for BTC that would allow for quality control of its efficiency and sustainability, and little is currently known about the full-scale performance of BTC. Based on the scoping literature review of 31 documents in the scientific database and eight documents from grey literature, a standard design model was proposed for the BTC technology based on the concept of water balance, greywater flows, rain, infiltration, and evapotranspiration. The first two steps of the BTC design were determining the areas required for infiltration and evapotranspiration. A cylindrical form trench, the soil percolation rate, and the hydraulic loading rate were considered for the infiltration area. The banana trees' evapotranspiration rate was taken into consideration for the evapotranspiration area. The proposed model was applied in a case study where we used a trench with 0.8 m depth and 1.5 m diameter. This study proposes a standard design criterion for the BTC based on environmental factors, and the scoping of the literature provides the basis for future studies to evaluate its environmental sustainability.

San Francisco is spearheading the city-wide installation of onsite non-potable water reuse systems (ONWS). Through a city ordinance, local authorities have induced a quickly growing ONWS market and initiated stakeholder networks that support the diffusion of ONWS solutions in San Francisco and beyond. [...]

Multilateral development banks (MDBs) play a pivotal role in financing water and sanitation infrastructure projects and thus have a major impact on the development of basic services. Although information about the MDBs' investments is publicly available, it is dispersed and not easily comparable. A comprehensive compilation of MDBs' water and sanitation investments has long been lacking. To address this gap, we assess water and sanitation financing by the three MDBs most relevant to Africa and Asia between 1960 and 2020: the World Bank, the African Development Bank, and the Asian Development Bank. We compile a new dataset by drawing on 3,639 water and sanitation projects and assess territorial trends, technology choices, distribution of financial burdens, and reforms to institutional arrangements. We find that MDBs' investments align with changing patterns of urbanization and increasingly finance sanitation infrastructures including non-sewered technologies. However, our results also suggest that institutional reforms have addressed utility efficiency through investment in equipment and skills rather than through increased commercialization and private sector participation. The leverage effect of MDB investment on private financing is negligible, whereas co-financing from local governments dominates.

Citywide inclusive sanitation (CWIS) is becoming the dominant paradigm for achieving safe sanitation for all by 2030. Its technical benefits have been explored, but the bargaining over financial and organizational changes CWIS entails have not yet been adequately addressed. Our case study explains the stalled rollout of CWIS in Dhaka, Bangladesh. We analyse policy pathways over the past 30 years through a combined territorial political economy and power perspective to understand their effects on equality. We highlight how donors link the introduction of CWIS to the organization of sanitation through a market; how the utility uses CWIS as an opportunity to avoid costly responsibilities in non-sewered sanitation; and how service co-production through community-based solutions is neglected. CWIS has successfully overcome the dogmatic technological focus in the sanitation system, but for citywide sanitation to be scaled inclusively, the dogmatic focus in the organization and financing of the sanitation sector must also be overcome.

Bengaluru represents a globally unique context for the diffusion of on-site wastewater treatment and reuse systems (ONWS). Local authorities have introduced a series of mandates that triggered a dynamically evolving mass-market for ONWS. [...]

The H+ area in Helsingborg, Sweden, is a sustainable city development project, served by "Tre-Rör-Ut" (Three-Pipes-Out), a world-unique source-separation and resource-recovery system for water, wastewater and food waste. [...]

The Jenfelder Au in Hamburg, Germany is a sustainable city development project, served by the "Hamburg Water Cycle" (HWC), a spearheading template for resource-recovery from source-separated water and wastewater, first of its kind at neighbourhood scale. [...]

Climate change, rapid urbanization and other grand challenges increasingly show that urban water and wastewater man-agement needs to be deeply rethought. A transformative shift is needed away from linear end-of-pipe to more circular system designs. Actors around the world have thus started developing decentralised urban wastewater treatment and reuse systems (DUWTRS). DUWTRS improve the flexibility, resilience and circularity of water and sanitation infrastructure and can thus play a key role in developing more sustainable cities. Yet, despite their high potential in solving multiple urban development challenges at once, only a few cities worldwide have successfully implemented them at scale. We thus lack well-documented templates and best practices of successful DUWTRS implementation. The Lighthouse Project aimed at filling this gap by assessing promising examples from around the world. To generate practice-oriented lessons, we compared six projects at different scales (city-wide vs. neighbourhood), in different contexts (high-income vs. low-/middle-income) and using different technological set-ups. We selected four neighbourhood-scale and two city-scale projects, equally distributed across high- and middle-income contexts. Data was collected between November 2021 and August 2022 through an extensive literature review and more than 100 semi-structured expert interviews. An integrative assess-ment framework was developed and used to derive key success conditions for DUWTRS implementation.

Nirvana Country Township is a high-end residential colony in Haryana State, which reuses treated effluent from on-site wastewater treatment facilities for urban greening in several residential areas. [...]

SaniChoice is an open source web tool that enables informed sanitation technology and system choices as inputs in strategic planning. It can be used both for capacity development (e.g. in trainings and workshops) and as a decision support tool. This Practitioners' Guide is for engineering and planning consultants who aim to apply SaniChoice as a decision support tool in a facilitated multi-stakeholder Structured Decision-Making (SDM) process that is part of such frameworks as City Sanitation Planning (CSP), Sanitation 21 or Community-Led Environmental Sanitation (CLUES). [...]

Not all the challenges of informal settlement upgrading programmes can be anticipated from the start. It calls for cumulative learning within the programme's timeline. This paper investigates the role of organizational learning in influencing programme outcomes. The analysis of the Kenya Informal Settlement Improvement Programme (KISIP) shows that a lack of organizational learning routines can lead to reduced programme success, and that programme learning can improve programme outcomes. Well-conceptualized processes that include participation, coordination, communication and the synthesis of information are essential, though insufficient alone. Additional barriers, including a sudden increase in the number and diversity of actors and projects, their deteriorating commitment, inequitable incentives and inadequate tools to support programme learning, can further exacerbate the absence of established programme learning routines. There is a need for explicit and transparent programme learning procedures across organizational levels in order to improve overall programme success.

The presence of septic tank effluents in open spaces and roads due to poor fecal sludge management (FSM) in low-income cities represents a source of fecal contamination and potential risk of fecal-oral disease transmission. This study aimed at assessing fecal contamination exposure through six exposure pathways in Abobo, District of Abidjan in Côte d’Ivoire. The public health risk was evaluated in two clusters to identify the dominant exposure pathways and to compare which populations were most exposed. The SaniPath approach used included behavioral surveys (transect walk, household survey, school survey and community survey) and laboratory analysis. Surveys were conducted among 200 households, 6 schools and 4 community groups. In addition, 120 environmental samples were collected (in 2 clusters of 6 pathways with 10 samples per pathway per cluster). The colony forming unit (CFU) of E. coli was determined in samples using the surface plating technique on agar medium. Bayesian analyses were performed to estimate the distributions of fecal concentration and contact frequency, and exposure to fecal contamination was estimated using the Monte Carlo method with 1000 iterations. The highest concentrations of E. coli were observed in open drains (6.1 log CFU/ml), gullies (6 log CFU/ml) and soil (5.8 log CFU/ml) samples. The dominant exposure pathways were determined by multiplying the dose and the percentage of the population exposed, which was then log-transformed and denoted by (E). The study found that street food and gullies are the two dominant exposure pathways among the population living in Abobo. 100% of the children and between 73% and 91% of the adults are exposed to these dominant pathways in low and poor areas. In middle and high-income areas this concerns 75% to 95% of children and between 26% and 70% of adults. As well, the risk of exposure to the dominant pathways hits 9.2 in children and 8.6 for adults living in poor areas. While it reaches 8.1 and 7.1 respectively in children and adults living in middle and high-income areas. The study outcomes could help the authorities to structure how to target municipal wide interventions toward improving the sanitation conditions in the different neighborhoods.