Water Sanitation Research Articles

Cold Plasma for Enhanced Water Purification

Abstract Access to clean water remains a critical global challenge, with traditional water treatment methods often failing to eliminate complex pollutants such as pharmaceuticals, dyes, and antibiotics. Cold atmospheric plasma technology offers a promising solution by generating reactive oxygen and nitrogen species at room temperature, effectively degrading these contaminants and inactivating pathogens. Recent advancements in cold plasma have shown significant potential in water treatment applications. Cold plasma has demonstrated efficacy in disrupting bacterial biofilms, reducing antibiotic contaminants, and degrading complex organic pollutants, making it an innovative and eco-friendly alternative to conventional methods. This review examines the principles of plasma technology, evaluates its performance in water sanitation, and addresses the challenges of scalability and economic feasibility. By integrating cold plasma into existing water treatment systems and developing standardized protocols, this technology can significantly contribute to sustainable water management and public health, supporting the Sustainable Development Goals (SDGs).

Flood Risk Assessment and Its Implications on Critical Infrastructure Resilience in Nigeria

Flooding is one of the recurrent natural disasters in Nigeria that poses huge threats to not just people but also critical infrastructures. In 2024, the Federal Ministry of Water Resources and Sanitation and the Nigeria Hydrological Services Agency (NIHSA) identified 31 states including the FCT as high-risk areas for significant flood impacts. The impact of floods generally has caused devastating damage to critical infrastructures resulting from high rain intensities for a long duration. It becomes pertinent to evaluate the impact of floods on critical infrastructures like roads, bridges, residential buildings, water supply systems, and electricity facilities. Thus, this research seeks to explore the vulnerabilities and impacts of floods on critical infrastructure which is fundamental to economic growth, development, and coping mechanisms. A structured questionnaire was distributed among a sample of 90 including government department, construction industry, and community members to seek their views on the vulnerability risk of infrastructure and flood sources. Results indicate that most of the damages reported 42% were due to the destruction of roads and bridges, followed by residential houses at 31%. The main cause of flooding identified by 54% of respondents was poor drainage systems, while 31% cited poor waste management as a contributing issue. Hence, restoration of the drainage systems, implementation of prohibitions on encroachment of flood-prone areas and improvement of early warning systems are critical and pressing. The uniqueness of the study lies in its effort to address the gaps and challenges that exist in infrastructure resilience by identifying the most critical elements that are prone to risks and proposing mitigation measures against floods in the urban centers of Nigeria which are experiencing rapid growth.

Using polymerase chain reaction cycle threshold (PCR Ct) values for predicting and managing cholera outbreaks: potential, challenges, and future directions

Abstract Background Cholera continues to be a major public health threat, especially in regions with poor sanitation and limited access to clean water. Accurate prediction and management of cholera outbreaks are essential to reduce mortality and morbidity. This review focuses on the potential of polymerase chain reaction (PCR) cycle threshold (Ct) values as an innovative tool for early detection and control of cholera outbreaks, specifically highlighting its utility in predicting outbreaks and guiding public health responses. Main body of abstract PCR Ct values offer a significant advantage in the early detection of Vibrio cholerae, the pathogen responsible for cholera, in both clinical and environmental samples. By providing quantitative data on bacterial load, lower Ct values indicate a higher concentration of the pathogen, signaling the potential for increased disease transmission. These values allow for more precise, real-time monitoring of cholera outbreaks and aid in targeting intervention strategies such as water sanitation improvements, vaccination campaigns, and antibiotic treatments. Moreover, the application of Ct values in environmental surveillance, particularly in monitoring water sources, offers a proactive approach to prevent the spread of cholera by identifying contamination risks before human cases arise. However, the implementation of PCR in low-resource settings faces significant challenges, including high costs, the need for advanced laboratory infrastructure, and a lack of technical expertise. Addressing these barriers through cost-effective innovations and capacity building initiatives is crucial for optimizing the use of PCR Ct values in cholera management. Conclusion PCR Ct values hold great promise for improving cholera outbreak prediction and control. Despite challenges in adopting this technology in resource-limited settings, the integration of Ct value monitoring into public health frameworks can enhance early detection efforts and contribute to more effective cholera management strategies.

Improved water and sanitation in early life and cognition in adolescence: Evidence from four countries

Abstract Early life environmental exposures, such as drinking water quality and sanitation, can have long lasting effects on human capital accumulation. Using matched samples of over 8,000 children across Ethiopia, India, Peru, and Vietnam, this paper examines
the relationship between early life access to improved drinking water and improved sanitation and cognition at the age of fifteen. It finds that children with early life access to improved drinking water score 1.6 to 2.8 percentage points higher on math, reading,
and vocabulary tests. A similar, yet less precisely measured, pattern emerges for early life access to improved sanitation. Analysis by gender shows that the effects of early life drinking water access are stronger and more precise among girls. An examination of
pathways underlying these relationships provides preliminary evidence that learning over the life course is a leading mechanism. Quantifying these long-term cognitive benefits provides insight for directing and prioritizing resources for global efforts to
increase equitable access to improved drinking water and sanitation.

Mutations in the main antigenic sites of VP7 and VP8* from G3P[8] rotavirus a strains circulating in Brazil may impact immune evasion to rotavirus vaccination.

In the post-rotavirus (RVA) vaccination era, uncommon and zoonotic strains have emerged as causative agents of acute gastroenteritis in humans, including the equine-like G3P[8] strains. First identified in 2013, this strain has quickly spread worldwide, reaching the position of the most prevalent genotype in many countries, including Brazil. Here, we report full genotype characterization and phylogenetic analysis of two equine-like G3P[8] strains detected in Goiás, a state in the Cerrado biome of the Brazilian Midwestern region, during the year of 2019. The strains were detected in different socioeconomic and demographic contexts: GO-MR from an asymptomatic adult living in a rural traditional community and GO-H5 from a symptomatic child from the state capital, with access to safe drinking water and essential sanitation services. These strains also displayed different backbone constellations considering the NSP2 gene segment (G3-P [8]-I2-R2-C2-M2-A2-N2-T2-E2-H2 for GO-MR and G3-P[8]-I2-R2-C2-M2-A2-N1-T2-E2-H2 for GO-H5). Furthermore, significant mutations in the main epitope sites of the VP7 and VP8* proteins of the detected strains, and other Brazilian G3P[8] viruses, were found with the comparison to RV1 and RV5 vaccine proteins, indicating a potential ability of these viruses to evade vaccine protection, which may contribute to their prevalence both nationally and globally. In summary, this study corroborates the genetic diversity of equine-like G3P[8] DS-1-like strains circulating worldwide, highlights the epidemiological importance of adults as reservoirs of RVA and shows the substantial differences between these emerging strains and the currently used anti-RVA vaccines, which may partially explain their predominance due to potential evasion of vaccine-induced protection.

The Learning Hub – Empowering Remote Rural Communities across India through Blended Learning

This case study explores The Learning Hub, an initiative of the Aga Khan Foundation (AKF), which hosts, among many other learning assets, a three-strand learning programme to enhance the quality of life in rural India through innovative blended learning strategies. The programme, delivered by the Aga Khan Rural Support Programme India (AKRSPI), addresses critical issues such as water sanitation, sustainable agriculture, and governance by delivering courses through a combination of video-based online content and in-person facilitation. The study provides a brief analysis of AKF's blended learning approach, and its impact on community resilience, economic development, and social equity.

Mapping schistosomiasis risk landscapes and implications for disease control: A case study for low endemic areas in the Middle Paranapanema river basin, São Paulo, Brazil.

Schistosomiasis, a chronic parasitic disease, remains a public health issue in tropical and subtropical regions, especially in low and moderate-income countries lacking assured access to safe water and proper sanitation. A national prevalence survey carried out by the Brazilian Ministry of Health from 2011 to 2015 found a decrease in human infection rates to 1%, with 19 out of 26 states still classified as endemic areas. There is a risk of schistosomiasis reemerging as a public health concern in low-endemic regions. This study proposes an integrated landscape-based approach to aid surveillance and control strategies for schistosomiasis in low-endemic areas. In the Middle Paranapanema river basin, specific landscapes linked to schistosomiasis were identified using a comprehensive methodology. This approach merged remote sensing, environmental, socioeconomic, epidemiological, and malacological data. A team of experts identified ten distinct landscape categories associated with varying levels of schistosomiasis transmission potential. These categories were used to train a supervised classification machine learning algorithm, resulting in a 92.5% overall accuracy and a 6.5% classification error. Evaluation revealed that 74.6% of collected snails from water collections in five key municipalities within the basin belonged to landscape types with higher potential for S. mansoni infection. Landscape connectivity metrics were also analysed. This study highlights the role of integrated landscape-based analyses in informing strategies for eliminating schistosomiasis. The methodology has produced new schistosomiasis risk maps covering the entire basin. The region's low endemicity can be partly explained by the limited connectivity among grouped landscape-units more prone to triggering schistosomiasis transmission. Nevertheless, changes in social, economic, and environmental landscapes, especially those linked to the rising pace of incomplete urbanization processes in the region, have the potential to increase risk of schistosomiasis transmission. This study will help target interventions to bring the region closer to schistosomiasis elimination.

Towards the realization of socio-economic rights of children in Zimbabwe; a child sensitive policy framework

ABSTRACT With high incidences of poverty and a depressed economy as well as limited political will, it will be difficult to guarantee the socio-economic rights of children in Zimbabwe. Children struggle to get access to basic services such as health care, basic education, clean water and proper sanitation. This study critically reviews the implementation or lack thereof, of the key socio-economic rights as enunciated in the constitution and child-sensitive policies in Zimbabwe. Through document analysis, the study offers a nuanced examination of social policy implementation in the country. This paper advances the argument that poverty and inequality in Zimbabwe have worsened the lives of children who are subjected to inadequate food, lack access to proper heath facilities and proper shelter among other social amenities. Using a human security framework, the paper foregrounds the need for deliberate policies which respond to the needs of the underprivileged children. The paper concludes that a multifaceted and multi-stakeholder approach will ensure that no child is left behind as envisioned by the agenda of the sustainable development goals. It recommends that the government should implement various policies which guarantee the protection of children in need.

Nano Filtration Techniques in Waste Water Treatment

Nano filters, based on nanotechnology to improve filtration processes, offer sophisticated solutions for contaminant removal from liquids and gases. The filters in this group include polymeric membranes with a pore size of 1-100 nanometres, ceramic membranes that are tolerant to chemicals, and carbon nanotube and graphene-based filters with advancedpermeability and selectivity. Recently, differentiated nanomaterials have been developed to make composite membranes with improved performance and durability. However, NF have disadvantages such as membrane fouling and high production costs. In this respect, research is currently being done to come up with solutions to the challenges, optimize the integration of nanomaterials, and realize application possibilities in water treatment, air purification, and industrial processes. On the whole, NF stand as the radical improvement filtration technology has so far achieved, and further research is bound to make them more efficient and cheaper About 17–19 million people in the world lack access to clean water. It is estimated that about 3.4 million people die every year from water scarcity, sanitation, and hygiene-related problems out of which 99% of deaths occurin developing countries. In recent years, water contamination has become a global environmental concern. The paper providesinsights into advancements in wastewater treatment through nano-filters. The paper focuses on evaluating the effectiveness ofnanomembranes in removing containments such as inorganic salts, organic compounds, and heavy metals. Additionally, the paper gives information about performance based on a comparison of the tractional filters and RO in terms of flexibility, durability, efficiency, and cost-effectiveness. Furthermore, it explores the application of NF in industries such as textile, pharmaceuticals, and agriculture and evaluates the versatility and effectiveness in these sectors.

Inisiasi Pengolahan Air Embung dengan Teknologi Multimedia Filter (MMF) sebagai Solusi Air Bersih di Kabupaten Bojonegoro

Clean water and proper sanitation are fundamental human needs. Nganti Village, located in Ngraho Subdistrict, Bojonegoro Regency, faces significant drought and clean water shortages, particularly during the dry season. The water quality remains subpar despite the presence of springs and water reservoirs. Consequently, processing raw water from the village's reservoir can offer a viable solution. This service activity aims to harness water reservoirs as a clean water source through multimedia filter (MMF) technology. The activities, conducted from 2022 to the end of 2023, encompass four stages: socializing the program plans, constructing multimedia filters (MMF), installing the water treatment unit on-site, and evaluating water quality, followed by necessary follow-ups. The primary activities involve installing water treatment units with MMF technology in collaboration with village officials and the community. The treated water is then tested for quality at the IPB University laboratory. Test results indicate that MMF technology significantly improves water quality, reducing parameters such as Magnesium, Manganese, Calcium, Iron, and Phosphate by 25.8‒97.8%, thus meeting quality standards. However, some parameters, such as TSS, COD, and Zinc, still exceed quality standards, necessitating further processing. This advanced water treatment requires involvement from the local government, particularly in funding through community empowerment programs, to install advanced treatment units and provide operational support for these units.

Effluents from septic systems and impact on groundwater contamination: a systematic review.

Globally, 2.2 billion people rely on groundwater for their water supply, and 2.8 billion use onsite sanitation systems for their sanitation needs. Groundwater contamination from septic systems is a critical public health concern, linked with diseases related to water sanitation and hygiene. Despite the severe impacts of septic systems on groundwater quality, comprehensive global studies remain limited. This study conducted a systematic review of articles published between 2012 and 2023 on topics related to septic systems and groundwater contamination, and 82 peer-reviewed articles met the inclusion criteria. The review identified key contaminants, including E.coli, nitrate, Enterococcus spp., total coliform, ammonium, phosphate, chlorides, and pharmaceuticals. Research on microbial indicators is more prevalent in Africa, while research on nutrients is common in North America. Research on organic contaminants including polyfluoroalkyl substances (PFAS), pharmaceuticals, and personal care products (PCPPs) is limited, particularly in low-and middle-income countries. Critical factors contributing to groundwater contamination include soil, hydrogeological conditions, climate, septic system maintenance and functioning, and septic density. The goal of this study was to comprehensively assess the extent of groundwater contamination resulting from septic system effluents by identifying the major contaminants typically found in affected groundwater sources and exploring the factors contributing to contamination. Identifying the major contaminants and factors related to groundwater contamination from septic systems is crucial for developing effective management strategies to protect groundwater sources.

Use of BD BACTEC™ MGIT™ for the detection of non-tuberculous mycobacteria in sanitary water samples.

The most commonly used method for the detection of non-tuberculous mycobacteria (NTM) is culture in BD BACTEC™ MGIT™ Mycobacteria Growth Indicator Tubes incubated in an automated growth detection reader BD BACTEC™ MGIT™ 960 Instrument. The system is currently validated for the detection of mycobacteria from clinical specimens but not environmental matrices. From November 2018 to December 2023, 1,369 sanitary water samples from 92 heater-cooler units (HCUs) and 747 sanitary water samples from 489 haemodialysis instruments (dialysis) were concentrated, decontaminated, and cultured on MGIT and solid Lowenstein-Jensen media to evaluate the presence of NTM. NTM-positive cultures (n = 261 HCUs and n = 20 dialysis) were purified by Middlebrook 7H11 agar plate subcultures and identified by MALDI-TOF mass spectrometry technology. The purpose of this study was to evaluate the accuracy and reproducibility of the MGIT system on sanitary water from HCU and dialysis, using the two strains most frequently isolated on these devices as sources of NTM during the Emilia- Romagna surveillance programme: M. chimaera (79%) and M. saskatchewanense (100%), respectively. To evaluate the accuracy, sanitary water was spiked with M. chimaera and M. saskatchewanense at the theoretical concentrations of 100 and 10 CFU/mL, and all resulted positive in MGIT tubes. No significant changes in time to positivity were observed when MGIT tubes were inoculated with NTM at the theoretical concentrations of 10 and 100 CFU/mL on 3 consecutive days, indicating that the detection method is reproducible. The MGIT system is suitable for detecting the presence of NTM in sanitary water samples as it was capable of detecting up to 4 CFU/mL for both M. chimaera and M. saskatchewanense. Our results indicate that the MGIT system can be used for NTM detection not only for clinical samples but also for environmental matrices.

Charting water sanitation concerns within vulnerable communities and international contexts on X

This study used a computational exploratory approach to examine X discourse on water sanitation challenges in the Black Belt region in the United States and compared it with larger international contexts. The research sought to uncover themes that impact salient environmental health issues and support future interventions. A two-part research question addressing the nature of water issues in a local and global context, resulted in a data set (n = 12,472 observations) analyzed using computational text analysis. Findings indicated that there was limited attention of issues discussed in the Black Belt region. On the other hand, global communication resulted in a greater discussion surrounding community-level problems and the very public nature of concerns, despite both issues being public-facing. Study findings contribute to the body of knowledge on social media discourse that develops as environmental health challenges develop into broader issues that emerge as global health risks.

Investigation of an optimal control strategy for a cholera disease transmission model with programs

Cholera is a disease of poverty affecting people with inadequate access to safe water and basic sanitation. Conflict, unplanned urbanization and climate change all increase the risk of cholera. In this article, an optimal control deterministic mathematical model of cholera disease with cost-effectiveness analysis is developed and analyzed considering both direct and indirect contact transmission pathways. The model qualitative behaviors, such as the invariant region, the existence of a positive invariant solution, the two equilibrium points (disease-free and endemic equilibrium), and their stabilities (local as well as global stability) of the model are studied. Moreover, the basic reproduction number of the model is obtained. We also performed sensitivity analysis of the basic parameters of the model. Then an optimal control problem is designed with a control functional having five controls: vaccination, treatment, environment sanitation and personal hygiene, and water quality improvement program. We examined the existence and uniqueness of the optimal controls of the system. Through the implementation of Pontryagin's maximum principle, the characterization of the optimal controls optimality system is established. The numerical simulation results the integrated control strategies demonstrated that strategy 2, 7, and 12 are effective programs to combat cholera disease from the community. Based on the local circumstances, available funds, and resources, it is recommended to the government stakeholders and policymakers to execute any one of the three integrated intervention programs.

Two Sporadic Cases of Legionellosis Associated with the Use of Domestic Ultrasonic Humidifiers

Two sporadic cases of legionellosis occurring in consecutive years were confirmed by positive antigenuria to Legionella pneumophila serogroup 1 in individuals with limited mobility who were confined to their homes. Both cases had a history of using ultrasonic humidifiers and of low exposure to other possible sources of infection. This study was conducted through an expanded epidemiological survey and home inspection. Samples were collected from domestic hot water and humidifiers. Environmental isolates were characterised by immunoagglutination and immunofluorescence. The Dresden panel is employed for the determination of groups and subgroups of serogroup 1. The amoebae were isolated by water filtration and subsequent cultivation of the filters. Identification of the isolates was conducted through the sequencing of PCR products. In both cases, epidemiological studies identified the ultrasonic humidifiers as the probable source of infection. The presence of Legionella pneumophila was confirmed in the sanitary water installation and in the humidifiers, where high values of Legionella pneumophila serogroup 1 counts were also obtained. The isolates were characterised as Olda Oxford and Olda OLDA. Furthermore, in addition to the Legionella isolates, the presence of Vermamoeba vermiformis was also identified in samples obtained from domestic hot water and humidifiers in one of the residential addresses under investigation. It has been demonstrated that humidifiers can act as an amplification mechanism for pathogenic microorganisms when they are not cleaned and maintained correctly. This can pose a health danger, especially to people with previous respiratory pathologies, the immunosuppressed, and the elderly. Therefore, it is of the utmost importance that professionals who recommend the therapeutic use of this equipment should issue warnings regarding the importance of its correct use, cleaning, and disinfection. Finally, humidifiers should be considered in epidemiological surveys and in the study of sporadic cases.

Evaluating the Role of Customer Relationship Management in Enhancing Customer Satisfaction: A Study of Arusha Urban Water Supply and Sanitation

This study explores the impact of Customer Relationship Management (CRM) on customer satisfaction at the Arusha Urban Water Supply and Sanitation Authority (AUWSA). Employing a case study research design, the research targeted AUWSA customers and staff, using convenience and purposive sampling techniques to select a sample size of 100 individuals. Both primary and secondary data were utilized, with primary data gathered through questionnaires and interviews, and secondary data obtained from various documentary sources. Data analysis involved both quantitative and qualitative methods, with descriptive and inferential statistics applied to the quantitative data using SPSS. Qualitative data was analyzed through content analysis. The findings reveal that Information Technology (IT) significantly enhances timely information processing, facilitates effective customer communication, and promotes efficient service delivery, thereby reducing customer complaints and administrative errors. The study concludes that IT is crucial for improving customer satisfaction and recommends further research to explore CRM's impact on customer satisfaction in other service industries in Tanzania.

Insights into water insecurity in Indigenous communities in Canada: assessing microbial risks and innovative solutions, a multifaceted review.

Canada is considered a freshwater-rich country, despite this, several Indigenous reserves struggle with household water insecurity. In fact, some of these communities have lacked access to safe water for almost 30 years. Water quality in Canadian Indigenous reserves is influenced by several factors including source water quality, drinking water treatments applied, water distribution systems, and water storage tanks when piped water is unavailable. The objective of this multifaceted review is to spot the challenges and consequences of inadequate drinking water systems (DWS) and the available technical and microbiological alternatives to address water sanitation coverage in Indigenous reserves of Canada, North America (also known as Turtle Island). A comprehensive literature review was conducted using national web portals from both federal and provincial governments, as well as academic databases to identify the following topics: The status of water insecurity in Indigenous communities across Canada; Microbiological, chemical, and natural causes contributing to water insecurity; Limitations of applying urban-style drinking water systems in Indigenous reserves in Canada and the management of DWS for Indigenous communities in other high-income countries; and the importance of determining the microbiome inhabiting drinking water systems along with the cutting-edge technology available for its analysis. A total of 169 scientific articles matched the inclusion criteria. The major themes discussed include: The status of water insecurity and water advisories in Canada; the risks of pathogenic microorganisms (i.e., Escherichia coli and total coliforms) and other chemicals (i.e., disinfection by-products) found in water storage tanks; the most common technologies available for water treatment including coagulation, high- and low-pressure membrane filtration procedures, ozone, ion exchange, and biological ion exchange and their limitations when applying them in remote Indigenous communities. Furthermore, we reviewed the benefits and drawbacks that high throughput tools such as metagenomics (the study of genomes of microbial communities), culturomics (a high-efficiency culture approach), and microfluidics devices (microminiaturized instruments) and what they could represent for water monitoring in Indigenous reserves. This multifaceted review demonstrates that water insecurity in Canada is a reflection of the institutional structures of marginalization that persist in the country and other parts of Turtle Island. DWS on Indigenous reserves are in urgent need of upgrades. Source water protection, and drinking water monitoring plus a comprehensive design of culturally adapted, and sustainable water services are required. Collaborative efforts between First Nations authorities and federal, provincial, and territorial governments are imperative to ensure equitable access to safe drinking water in Indigenous reserves.

Project Time Management and Performance of Kenya Towns Water Supply and Sanitation Programme at Central Rift Water Works Development Agency.

The general objective of the study was to examine the influence of Project time management on the performance of Kenya Towns Water Supply and Sanitation Projects at Central Rift Water Works Development Agency specifically the study. The study was anchored by pickle jar theory, theory of constraints, theory of effective project implementation and communication theory. A descriptive survey design was used in this research. The study targeted project managers, consultants, coordinators, engineers, contractors, community representatives, and representatives from the Ministry of Water and Irrigation in three projects under the Kenya Towns Water Supply and Sanitation Programme, carried out by the Central Rift Valley Water Works Development Agency. The counties involved are Narok and Nyandarua. A sample size of 83 respondents was used. The participants in the study were chosen using a simple random selection method. Data was collected using a questionnaire and interview schedule. The analysis was both qualitative and quantitative. Quantitative data collected was analysed using Statistical Package for Social Sciences version 25. The study analysed both descriptive and inferential statistics. Thematic analysis was used to analyse qualitative data collected from the interview schedule. The analysis revealed a Pearson correlation of (r=0.512, p<0.05). This indicated a moderate positive and significant relationship between project time planning and the performance of Kenya Towns Water Supply and Sanitation Projects. The also showed a Pearson correlation of (r= 0.553 p<0.005) which indicates a positive and significant relationship, suggesting that effective prioritization of time-related tasks plays a crucial role in enhancing project performance. Additionally, the correlation analysis for time tracking yielded a Pearson correlation of (r=0.390 p<0.005). This suggests a moderate positive and statistically significant relationship between time tracking and project performance. Lastly, the study revealed the impact of project team communication on performance, finding a Pearson correlation of (r= 0.672 p<0.005). This indicated a strong positive and significant relationship, suggesting that effective communication among project teams significantly enhances performance outcomes. The findings indicated that 45.1% of the variation in the performance of the project could be explained by the independent variables studied, while 54.9% of the variation is attributed to other factors not covered in this study. The study concluded that project time planning, time prioritization, time tracking, and project team communication had an effect performance of Kenya Towns Water Supply and Sanitation Projects at Central Rift Water Works. The study recommends implementing structured time planning methods, enhancing time tracking, and fostering effective communication within teams to improve project performance. Future research should explore stakeholder engagement and the role of emerging technologies in water project management

Evaluation of physico-chemical quality and occurrence of Salmonella in water from food retail outlets

Salmonella is one among the most important biological contaminants in drinking water that possess safety hazards to human life. Faecal contamination of the water, indirectly from the household sewage discharge, municipal sewage etc. attributes to the repeated detection of Salmonella in water. This study aimed to investigate the occurrence of Salmonella and physico- chemical quality evaluation of samples of water collected from food retail outlets of Thrissur and Kollam districts. A total of 50 water samples (25 each from Thrissur and Kollam districts) used for cooking purpose were collected over a period of six months, March to August 2023. Water samples were subjected to comparative evaluation of physico-chemical qualities viz., pH, turbidity, total dissolved solids (TDS) and hardness. Collected water samples were examined for Salmonella spp. by conventional culture method and PCR. Genus specific and virulence genes of the isolates were detected using polymerase chain reaction. The occurrence of Salmonella spp. in samples of water collected from Thrissur was 24 per cent whereas in Kollam district it was only four per cent. The overall occurrence of Salmonella spp. in samples of water collected from both districts was 14 per cent. Physico-chemical parameters of water samples viz., pH, turbidity, total dissolved solids and hardness were within the BIS prescribed standards. The molecular characterisation of Salmonella spp. detected 16S rRNA in all isolates but invA and spvA genes were detected only in 14.28 per cent of the isolates. Hence proper disinfection of water and food sanitation in the retail outlets will help to minimize the risk of foodborne pathogens Keywords: Salmonella, water, physico-chemical quality, food retail outlets

Modelling scenarios for water supply and sanitation technologies in Jordan

The influx of refugees, population growth and current agricultural practices have led to an increase in water demand in Jordan, placing pressure on existing water provision. Climate change further exacerbates declining water availability. Against this backdrop, the techno-economic feasibility of four water supply and sanitation alternatives for small and medium scale cities in Jordan were explored, using local unit costs and Al-Mafraq as a case study. City level piped network combined with household rooftop rainwater harvesting and surface runoff collection into local ponds and piped networks with treatment using the nature-based solution of root-zone for sanitation were demonstrated to provide the highest benefits in terms of cost, convenience and water conservation. Our work highlights the need to invest in long-term urban infrastructure networks to promote sustainable future growth of cities. This is vital to address severe water scarcity challenges that ultimately impact those at the urban fringes most.