Household waste has evolved into a core urban challenge, with increased quantities of waste being generated and with more complex material compositions, often containing toxic and hazardous elements. Critical systems theory understands cities as urban metabolisms, with different material and energy flows, highlighting the circularity in production, consumption, and discard. Waste pickers in low- and medium-income countries work on dumps and landfills, sifting through highly contaminated household waste and are exposed to health hazards. This paper discusses the risk factors, hazards, and vulnerabilities waste pickers are exposed to during collection and separation of recyclables, based on the review of literature on waste and environmental health and on findings from participatory research with waste pickers conducted in Brazil. We take a social and environmental justice perspective and identify the vulnerabilities and waste-borne hazards of household waste, associated with these workers, their communities, watersheds, and the environment. Household waste, although not always per se toxic or hazardous, can become a hazard if not collected or inadequately managed. Those communities where household waste is not collected or waste collection is insufficient are the most critical places. Informal and organized waste pickers, municipal or private waste collectors/workers, small waste traders and sometimes residents, particularly small children, may be considered vulnerable if exposed to waste-borne hazards. The results include recommendations to address household waste-borne hazards and vulnerabilities, according to waste workers involved in this research. Graphical Abstract

The wide-spread prevalence of unimproved sanitation technologies has been a major cause of concern for the environment and public health, and China is no exception to this. Towards the sanitation issue, toilet revolution has become a buzzword in China recently. This paper elaborates the backgrounds, connotations, and actions of the toilet revolution in China. The toilet revolution aims to create sanitation infrastructure and public services that work for everyone and that turn waste into value. Opportunities for implementing the toilet revolution include: fulfilling Millennium Development Goals and new Sustainable Development Goals; government support at all levels for popularizing sanitary toilet; environmental protection to alleviate wastewater pollution; resource recovery from human waste and disease prevention for health and wellbeing improvement. Meanwhile, the challenges faced are: insufficient funding and policy support, regional imbalance and lagging approval processes, weak sanitary awareness and low acceptance of new toilets, lack of R&D and service system. The toilet revolution requires a concerted effort from many governmental departments. It needs to address not only technology implementation, but also social acceptance, economic affordability, maintenance issues and, increasingly, gender considerations. Aligned with the ecological sanitation principles, it calls for understanding issues across the entire sanitation service chain. Public-private partnership is also recommended to absorb private capital to make up the lack of funds, as well as arouse the enthusiasm of the public.

About a million Rohingyas have fled due to the ethnic cleansing in Myanmar and sought refuge in Bangladesh. The refugees are located in temporary settlements on hilly areas of Cox’s Bazar with inadequate water and sanitation facilities, giving rise to diseases such as cholera, typhoid, and diarrhea. This exploratory study reports drinking water security challenges in two Rohingya refugee camps within the larger camp network—Camp 2 and the recently-built Camp 4 Extension (Camp 4Ext)—to discover the key everyday issues refugees are facing related to drinking water. Both qualitative and quantitative methods have been applied to determining whether contamination is occurring during the collection, transportation, and storage of drinking water by comparing the water quality at the source with that in storage. The results show that Camp 4Ext is more suited for living in several respects compared with the other camps, attributable to significantly better planning during its construction: there is a lower prevalence of diseases, lower water collection times, higher standards of sanitation, and better access to water sources. This study’s outcomes will help camp authorities and the various agencies working there to provide sustainable water and sanitation interventions to improve the wellness of the Rohingya refugees in Cox’s Bazar. The outcomes will also provide useful information and strategic direction to the global scientific and development communities who are working in refugee camps in other parts of the world, to tackle water security challenges.

(2020). Water insecurity compounds the global coronavirus crisis. Water International. Ahead of Print.

The vulnerability of the underfunded water, sanitation, hygiene, and health (WASH2) facilities, particularly in the developing nations, is exacerbated by natural disasters. This study assessed the impacts of Amphan on the WASH2 facilities of the affected coastal areas of Bangladesh via a structured questionnaire survey, key informant interviews, and direct observation. The study reported that Amphan destroyed WASH2 facilities, where only 20% of the respondents were receiving WASH2 services afterwards. Many respondents had to rely on unsafe water sources after the cyclone hit. While the respondents used different kinds of water treatment methods, three-quarters of the respondents reported issues related to odor, taste, color, and/or others. The majority had to practice open defecation due to damage done to sanitation facilities. Amphan has also resulted in an onslaught of several WASH2 diseases in the study area, primarily skin disease and diarrhea. The study has exhibited how intense natural disasters can completely render WASH2 facilities useless, causing the communities affected to switch to unsafe practices to meet their needs. The affected communities are in urgent need of adequate and sustainable WASH2 facilities.