scholarly journals A post-implementation evaluation of ceramic water filters distributed to tsunami-affected communities in Sri Lanka

2012 ◽  
Vol 10 (2) ◽  
pp. 209-220 ◽  
Author(s):  
Lisa M. Casanova ◽  
Adam Walters ◽  
Ajith Naghawatte ◽  
Mark D. Sobsey
Keyword(s):  
Water Quality ◽  
Sri Lanka ◽  
Tap Water ◽  
Water Sources ◽  
Indian Ocean Tsunami ◽  
Source Water ◽  
Cross Sectional ◽  
Ceramic Water Filters ◽  
Water Filters

Sri Lanka was devastated by the 2004 Indian Ocean tsunami. During recovery, the Red Cross distributed approximately 12,000 free ceramic water filters. This cross-sectional study was an independent post-implementation assessment of 452 households that received filters, to determine the proportion still using filters, household characteristics associated with use, and quality of household drinking water. The proportion of continued users was high (76%). The most common household water sources were taps or shallow wells. The majority (82%) of users used filtered water for drinking only. Mean filter flow rate was 1.12 L/hr (0.80 L/hr for households with taps and 0.71 for those with wells). Water quality varied by source; households using tap water had source water of high microbial quality. Filters improved water quality, reducing Escherichia coli for households (largely well users) with high levels in their source water. Households were satisfied with filters and are potentially long-term users. To promote sustained use, recovery filter distribution efforts should try to identify households at greatest long-term risk, particularly those who have not moved to safer water sources during recovery. They should be joined with long-term commitment to building supply chains and local production capacity to ensure safe water access.

scholarly journals Community and household determinants of water quality in coastal Ghana

2008 ◽  
Vol 6 (3) ◽  
pp. 339-349 ◽  
Author(s):  
Stephen T. McGarvey ◽  
Justin Buszin ◽  
Holly Reed ◽  
David C. Smith ◽  
Zarah Rahman ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Tap Water ◽  
Water Sources ◽  
Drinking Water Quality ◽  
Cross Sectional ◽  
E Coli ◽  
Multi Stage ◽  
Behavioural Factors ◽  
Socio Demographic Factors

Associations between water sources, socio-demographic characteristics and household drinking water quality are described in a representative sample of six coastal districts of Ghana's Central Region. Thirty-six enumeration areas (EAs) were randomly chosen from a representative survey of 90 EAs in rural, semi-urban and urban residence strata. In each EA, 24 households were randomly chosen for water quality sampling and socio-demographic interview. Escherichia coli per 100 ml H2O was quantified using the IDEXX Colilert® system and multi-stage regression models estimated cross-sectional associations between water sources, sanitation and socio-demographic factors. Almost three quarters, 74%, of the households have >2 E. coli /100 ml H2O. Tap water has significantly lower E. coli levels compared with surface or rainwater and well water had the highest levels. Households with a water closet toilet have significantly lower E. coli compared with those using pit latrines or no toilets. Household size is positively associated, and a possessions index is negatively associated, with E. coli. Variations in community and household socio-demographic and behavioural factors are key determinants of drinking water quality. These factors should be included in planning health education associated with investments in water systems.

Virus removal efficiency of ceramic water filters: effects of bentonite turbidity

2013 ◽  
Vol 14 (2) ◽  
pp. 304-311 ◽  
Author(s):  
Cameron Farrow ◽  
Edward McBean ◽  
Hamidreza Salsali
Keyword(s):  
Removal Efficiency ◽  
Potable Water ◽  
Source Water ◽  
Virus Removal ◽  
Ceramic Water Filters ◽  
Point Of Use ◽  
Cake Layer ◽  
Human Enteric Viruses ◽  
Removal Efficiencies ◽  
Water Filters

Ceramic water filters (CWFs) are utilized in many developing countries as point-of-use (POU) water treatment devices, to reduce waterborne pathogens in potable water. Virus removal efficiencies of several CWFs are investigated under various influent conditions using MS2 (ATCC: 15597-B1) as a surrogate phage for human enteric viruses. The addition of bentonite turbidity (6–8 NTU) in the influent source water showed increased viral removal efficiency of CWFs by 0.1–0.2 log compared to tests involving clear (<1 NTU) influents. Trials employing an applied clay cake layer, formed using highly turbid influent source water (100 NTU) and no cleaning regime between trials, resulted in viral removal efficiency values of 1.5–2.5 log, compared to 0.2–0.5 log during non-obstructed trials.

Source water impact model (SWIM) - a watershed guided approach as a new planing tool for indirect potable water reuse

2001 ◽  
Vol 43 (10) ◽  
pp. 267-275 ◽  
Author(s):  
J. E. Drewes ◽  
P. Fox
Keyword(s):  
Water Quality ◽  
Water Reuse ◽  
Reclaimed Water ◽  
Water Sources ◽  
Distribution Data ◽  
Source Water ◽  
Impact Model ◽  
Water Impact ◽  
Potable Reuse ◽  
The Impact

The scope of this study was to develop a model to assess the impact of source water quality on reclaimed water used for indirect potable reuse. The source water impact model (SWIM) considered source water qualities, water supply distribution data, water use and the impact of wastewater treatment to calculate reclaimed water quality. It was applied for sulfate, chloride, and dissolved organic carbon (DOC) at four water reuse sites in Arizona and California. SWIM was able to differentiate between the amount of salts derived by drinking water sources and the amount added by consumers. At all sites, the magnitude of organic residuals in reclaimed water was strongly effected by the concentration of organics in corresponding water sources and effluent-derived organic matter. SWIM can be used as a tool to predict reclaimed water quality in existing or planned water reuse systems.

scholarly journals Performance of black ceramic water filters and their implementation in rural Ecuador

2019 ◽  
Vol 9 (4) ◽  
pp. 694-702 ◽  
Author(s):  
Laura Guerrero-Latorre ◽  
Priscila Balseca-Enriquez ◽  
Carlos Moyota-Tello ◽  
Ronald Bravo-Camino ◽  
Stephanie Davila-Chavez ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
New Technology ◽  
Classical Model ◽  
International Standards ◽  
Household Water Treatment ◽  
Household Level ◽  
Ceramic Water Filters ◽  
Field Level ◽  
Water Filters

Abstract In rural Ecuador, microbial water contamination is associated with child morbidity mainly due to gastroenteritis. Black ceramic water filters (BCWF) are a new household water treatment recently developed to improve microbial removal from the classical model implemented worldwide. This study has assessed BCWF microbial performance at laboratory level by continuous filtering of spiked water with microbial surrogates (Escherichia coli and MS2 bacteriophage) and highly contaminated surface water to evaluate physicochemical pollutants' removal. At field level, baseline studies in Nanegal and Gualea districts have been performed to evaluate water quality and hygiene practices among communities and a six-month BCWF field implementation study in the Santa Marianita community. Results revealed poor drinking water quality in communities studied. Water treatment practices at household level were reported in low percentages. Conversely, results in BCWF filter assays at laboratory level for 600 litres of usage have shown 5.36 logarithms of bacterial removal and 3.83 logarithms for viral removal and significant reductions of physicochemical pollutants considering international standards. BCWF implementation in the Santa Marianita community reveals promising results on microbial water quality in households using this new technology. However, it is important to reinforce correct BCWF maintenance for better performance at field level.

BACKGROUND RADIATION LEVELS NEAR A MINERAL SAND MINING FACTORY IN SRI LANKA: CORRELATION OF RADIATION MEASUREMENTS WITH MICRONUCLEI FREQUENCY

2020 ◽  
Vol 189 (1) ◽  
pp. 114-126 ◽  
Author(s):  
Tania Warnakulasuriya ◽  
Senani Williams ◽  
Thiwanka Weerakkody ◽  
Mangala Dabarera ◽  
Kusum Rodrigo ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Large Scale ◽  
Low Dose ◽  
Background Radiation ◽  
Venous Blood ◽  
Low Dose Radiation ◽  
Cross Sectional ◽  
Radiation Measurements ◽  
Dose Radiation

Abstract Lanka Mineral Sands Ltd (LMS) is a company operating in Pulmoddai, Sri Lanka, mining for rare earth minerals along with monazite which contains thorium that emits ionizing gamma and alpha radiation on decay. The objective of the study was to determine the background radiation levels and selected radionuclides and then to correlate these levels with the frequency of micronuclei (MN) among persons residing in the vicinity of LMS. A cross-sectional study was conducted among persons of both sexes between 35 and 45 years of age residing in the vicinity of LMS. Background radiation measurements were obtained by a survey metre, and gamma spectrometry was done on soil samples. Five millilitres of venous blood was drawn for cytokinesis-blocked MN assay. Background radiation levels measured by the survey metre; 232Th, 226Ra and 210Pb mass activities in soil were highest in the samples collected from the LMS. The background radiation measurements positively correlated with MN frequency although the magnitude of the correlation was small (r = 0.176, p = 0.04). This implies that chronic long-term exposure to low-dose radiation may result in genotoxicity. Prospective large-scale studies are recommended to evaluate the long-term effect of exposure to low-dose radiation at Pulmoddai.

scholarly journals Water hardness and its impact on arterial stiffness and carotid atherosclerotic burdens; insights from the 'Corinthia study'

2021 ◽  
Vol 42 (Supplement_1) ◽  
Author(s):  
G Vogiatzi ◽  
E Oikonomou ◽  
G Lazaros ◽  
M Kostakis ◽  
Z Kypritidou ◽  
...  
Keyword(s):  
Water Quality ◽  
Carotid Artery ◽  
Arterial Stiffness ◽  
Cardiovascular Health ◽  
Tap Water ◽  
Water Hardness ◽  
Hard Water ◽  
Intima Media Thickness ◽  
Total Hardness ◽  
Cross Sectional

Abstract Introduction It has been long investigated the potential role of water quality in cardiovascular health. Purpose The aim of this study was to examine the association between water hardness, arterial stiffness and atheromatic burden in carotid arteries. Design and methods Corinthia study is a cross-sectional epidemiological study conducted in subjects aged 40–99 years. Intima media thickness (IMT) was measured in the left and right common carotid artery, carotid bulb and internal carotid artery. The average of the measurements (mean IMT) and the maximum IMT were determined as the representative value of carotid atherosclerosis burden. Pulse wave velocity (PWV) was used to evaluate arterial stiffness. Tap-water samples were collected from the study area, and analyzed for major, minor and trace elements, as well as pH and total hardness. Results In this analysis we included data from 1.404 participants. In subjects consuming water with a hardness above 250mg/dL, especially in those above >65 years old maximum and mean IMT was significantly increased compared to those consuming water with a hardness above 250mg/dL (1.61mm vs. 1.34mm respectively, p<0.001 and 1.15mm vs. 1.05, p=0.005 for WH ≥250mg/dL and WH <250mg/dL, respectively). Similarly, the prevalence of atheromatic plaques was higher in subjects of the first category (15,2% vs. 7,6%, p=0.004). No differences emerged for the arterial stiffness in the individual subgroups. statistically significant correlation was revealed (p=0.004). Conclusions There seem to be a negative association between extra hard water and carotid atheromatic burden highlighting the possible impact of water quality in cardiovascular health. FUNDunding Acknowledgement Type of funding sources: None. Table 1

Microbiological analysis of water and thickeners used for people with dysphagia

2020 ◽  
Vol 25 (Sup8) ◽  
pp. S16-S24 ◽  
Author(s):  
Elizabeth Boaden ◽  
Lois Thomas ◽  
Susan Caroline ◽  
Higham Watkins
Keyword(s):  
Water Quality ◽  
Room Temperature ◽  
Tap Water ◽  
Intervention Strategy ◽  
Water Sources ◽  
Microbiological Analysis ◽  
Sterile Water ◽  
Thickening Agent ◽  
Growth Of Bacteria

Thickened fluids are a recognised intervention strategy in use for people with dysphagia. However, their bacterial profile has not previously been examined. Aims: To identify bacteria and changes in bacterial profiles in a range of water sources and thickener preparations over a 5-day period. Methods: Nine experiments were performed using a range of preparations (sterile, drinking, non-drinking tap water) and a thickening agent (sterile sachet and a used tin). Findings: No bacteria were grown on serial subcultures of sterile water, both with and without thickener. Drinking, tap and thickened water left at room temperature for 24 hours may become contaminated with environmental organisms. Conclusions: The growth of bacteria in preparations of thickening agent appears to be dependent upon water quality, while the proliferation of bacteria is dependent upon the length of time the preparation is allowed to stand at room temperature.

scholarly journals Hubungan Kejadian Karies Gigi dengan Konsumsi Air Minum pada Masyarakat di Indonesia

2018 ◽  
Vol 28 (3) ◽  
pp. 211-218
Author(s):  
Made Ayu Lely Suratri ◽  
Tince Arniati Jovina ◽  
Indirawati Tjahja Notohartojo
Keyword(s):  
Drinking Water ◽  
Dental Caries ◽  
Health Research ◽  
Tap Water ◽  
Fluorine Content ◽  
Water Source ◽  
Water Sources ◽  
Cross Sectional ◽  
Almost All ◽  
Dug Well

AbstractThe prevalence of dental caries in Indonesia is quite high, the results of the 2013 Basic Health Research (Riskesdas) population in Indonesian with 25,9% problems with their teeth and mouth. The average dental caries measured by the DMF-T index was 4.6, which means that the average Indonesian population has experienced tooth decay as much as 5 teeth per person. Dental caries can occur due to low dental and oral hygiene, and less exposure to fluorida. The incidence of dental caries is also related to the fluorine content contained in drinking water. The purpose of the study was to determine the relationship between dental caries and drinking water consumption in Indonesia. This study is a non-intervention research with cross-sectional design conducted by the National Institute of Health Research and Development, Ministry of Health of the Republic of Indonesia through Riskesdas 2013. The study population was all Indonesians aged ≥ 12 years in 33 provinces, 497 districts/cities. Collecting Dental data is done by conducting interviews and oral and dental examinations. The results showed that almost all types of drinking water sources can cause dental caries except the type of drinking water from refill water, with p> 0,05 (p = 0,178) and retail tap water, with p> 0,05 (p = 0.307) and also almost all types of water sources that are widely used for household needs can cause dental caries except the type of water source from dug well is protected, with p> 0,05 (p = 0,979), where OR: 1,026 (CI 95 %: 0.979-1.076). The Conclusio is the incidence of dental caries has to do with at the drinking water except the type of drinking water from refill water. AbstrakPrevalensi karies gigi di Indonesia cukup tinggi, hasil Riset Kesehatan Dasar (Riskesdas) tahun 2013 penduduk Indonesia yang bermasalah dengan gigi dan mulutnya sebesar 25,9%. Rata-rata karies gigi yang diukur dengan indeks DMF-T sebesar 4,6 yang berarti rata-rata penduduk Indonesia telah mengalami kerusakan gigi sebanyak 5 gigi per orang. Karies gigi dapat terjadinya karena rendahnya kebersihan gigi dan mulut, dan kurang terpaparnya dengan fluorida. Kejadian karies gigi berhubungan juga dengan kandungan fluor yang terdapat dalam air minum. Tujuan dari penelitian untuk mengetahui hubungan antara kejadian karies gigi dengan konsumsi air minum masyarakat di Indonesia. Metode penelitian ini merupakan penelitian non intervensi dengan desain penelitian potong lintang yang dilaksanakan oleh Badan Penelitian dan Pengembangan Kesehatan, Kementerian Kesehatan Republik Indonesia melalui Riskesdas Tahun 2013. Populasi penelitian adalah seluruh penduduk Indonesia yang berusia ≥ 12 tahun di 33 provinsi, 497 kabupaten/kota. Pengumpulan data gigi dilakukan dengan melakukan wawancara dan pemeriksaan gigi dan mulut. Hasil penelitian menunjukkan hampir semua jenis sumber air minum dapat menyebabkan terjadinya karies gigi kecuali jenis air minum dari air isi ulang, dengan nilai p>0,05 (p= 0,178) dan air ledeng eceran, dengan nilai p>0,05 (p= 0,307) dan juga hampir semua jenis sumber air yang banyak dipergunakan untuk kebutuhan rumah tangga dapat menyebabkan terjadinya karies gigi kecuali jenis sumber air dari sumur gali terlindungi, dengan nilai p>0,05 (p= 0,979), dimana OR: 1,026 (CI 95%: 0,979-1,076). Kesimpulan penelitian menunjukkan kejadian karies gigi ada hubungannya dengan konsumsi air minum kecuali jenis air minum dari air isi ulang.

scholarly journals Data Visualization to Promote Understanding of the Community Health Impact of the Flint Water Crisis

2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Annika Nikhar ◽  
Daniel Kruger
Keyword(s):  
Water Quality ◽  
Tap Water ◽  
Water Source ◽  
Health Impact ◽  
Water Crisis ◽  
Adverse Health Effects ◽  
Health Related ◽  
Tap Water Quality ◽  
The Times

Between 2014 to 2015, the city of Flint suffered from critically contaminated water that caused long-term adverse health effects for many of its residents. In 2017, the “Speak to Your Health!” Community Survey assessed various aspects of adult Flint residents’ health. In addition to the health-related assessments, there were also questions about residents’ tap water quality, including during the times of Flint’s water crisis. This project used results from the survey on how water turbidity levels affected the number of days when poor mental and physical health interfered with daily activities. Diagramming software was used to create images representing this relationship in intuitive formats. These data visualizations are intended to boost data literacy among non-researchers, particularly the people and policymakers of Flint. Given that the crisis ensued after Flint’s water source was switched without proper infrastructure in place to ensure appropriate water quality, causing the population to suffer long term health, social, and economic complications, it is hoped that these results will be used to empower the population of Flint to advocate for continued investment in remediation and prevent future similar health crises.  

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