Presentation on theme: "Waltaji Terfa Kutane, WHO Ethiopia 14-18 October 2013 University of North Carolina Drinking Water Supply Sanitary Survey and Microbiological."— Presentation transcript:
Waltaji Terfa Kutane, WHO Ethiopia October 2013 University of North Carolina Drinking Water Supply Sanitary Survey and Microbiological Water Quality Assessment from Source to Home Storage in Gambella, Ethiopia
Outline Introduction Study Objective Methodology Result and Discussion Conclusion Actions following the study Result at national level
Introduction The principal risks to human health associated with the consumption of contaminated & polluted water are microbiological in nature. Dated back to Dr.John Snow's discovery of 1854 Broad Street cholera outbreak in England was spread by contaminated water. Most common & widespread danger contamination is either directly or indirectly, by sewage, by other wastes, or by human or animal excrement Exacerbated by poor Sanitation & hygiene behavior/practice in the water supply system including household Coliform bacteria are present in large number in excrement & sensitive indicator of the presence of faecal contamination.
Introduction Poor latrine facilities and open defecation coupled with hygiene behavior are responsible for improved water supply contamination Prüss-Üstün A, Bos R, Gore F, Bartram J. Safer water, better health: costs, benefits and sustainability of interventions to protect and promote health. World Health Organization, Geneva, 2008.
Introduction… Ethiopia Access to safe water supply was 49% (U=97%, R=39) using 2011 data – Piped 9% – Other improved 40% – Current coverage 54% National WASH Inventory Access to improved +shared sanitation facilities was 34% % (U=69%, R=25%) Access to any sanitation facilities 55% including un improved latrine facilities Source:2013 JMP update
Introduction… Ethiopia Safe water supply coverage based on the national standard is: Adopted from WHO GV the 2001 Ethiopia Standard: – Drinking-water should not contain any microorganisms known to be pathogenic— capable of causing disease—or any bacteria indicative of fecal pollution Urban: – dwellers that can obtain at least 20 liters/person/day throughout the year from a source within 0.5 km of the household. Rural: – dwellers that can obtain at least 15 liters/person/day throughout the year from a source with in 1.5 km of the household. In both cases the water must either be collected from: – an improved source such as protected well, improved & protected spring, sanitary rainfall catchment, etc.; or – can otherwise be treated to acceptable standards The national definition is in line with the five basic indicators included in the definition of safe water supply : – Quantity – Quality – Cost/ affordability – Continuity(24hours/day; 7days/week, 30 days/month, 365days/year) – Coverage /accessibility
Study Objective To identify risk factors responsible from source to household level for poor microbiological water quality of water supply system targeted for the survey To determine the level of contamination & microbiological quality of water supply system and household targeted by the survey To verify whether water supply included in this study met the national definition/satandard of safe water supply To inform the water supply system, health decision &development partners the importance drinking water quality incremental improvement through risk identifcation & management/ mitigation
Methodology Household have access to improved source Observation and interview WHO standard sanitary survey form for water source & HH risk identification Indicator bacteria test (Total coliform and E. coli using Membrane filtration technique
Result and Discussion 69.8%, 20%, 19.3%, 6.3%, 4.1% and 2.7% of the survey respondent households use municipal supply, protected wells, protected springs, river & pond respectively. Only 30.6% of the surveyed households getting half(10/litter/person/day) of the WHO recommended 20 litters per person per day for developing countries; 53.4% less than 6 litter & 16% they don`t know No reliable system at grass root level, which can track timely the issue of maintenance, community has to wait for more than a month from center to get back broken hand pumps.
Result and Discussion Improved vs Safe Drinking Water Boreholes & tube wells…31% not safe Protected springs…….37% not safe Protected dug wells….. 57% not safe Source comndg.water.target.m et.but.what.about.sanit ation.and.darrhea Improved vs Safe Drinking Water Boreholes & tube wells…31% not safe Protected springs…….37% not safe Protected dug wells….. 57% not safe Source comndg.water.target.m et.but.what.about.sanit ation.and.darrhea
Result and Discussion WHO/UNICEF JMP RADWQ, result for Ethiopia Compliance with national standard & WHO Guide line – Microbiological Quality sample from source Piped…………………..87.6% Protected springs …. 43.3% Borehole…………………67.9% Protected well……… Total……………………….72% – Microbiological Quality sample from household (n=1000) Fecal contamination ……………….55% – Sanitary survey Result Protected springs 316 inspected found spring box absent or faulty38.3% and diversion ditch above the spring absent or non- functional 87% Piped water distribution system 428 inspected found cracks in the pre-filters 21.1% and mud balls or cracks in any of the filters 15.8%
Result and Discussion Education level(n=635) DiarrhoeaTyphoid Dysente ry Hepatiti s CholeraParasite NoNo% NoNo %NoNo%NoNo%NoNo%NoNo% > Read & write Illiterate Total Knowledge of respondent about disease prevention by using safe Water supply by educational level, Gambella, Ethiopia significant difference with educational level on prevention of diarrhoea with safe water compared greater than 12 grade with illiterate (X²= 10.96; P<0.001). Better understanding /knowledge with respect to diarrhoea, cholera and parasite
Result and Discussion Education level (n=579) CupDirty container Uncovere d container Dirty cover Chicken/ animals Drawing by hand NoNo%NoNo%NoNo%NoNo%NoNo%NoNo% > Read and write Illiterate Total Knowledge of respondents on water container contamination as means of waterborne disease transmission in the home, Gambella, Ethiopia More than half of respondent claimed that uncovered container, dirty container & use of the same cup for water drawing & drinking are responsible for disease transmission Photo, Arto S, WASH COM
Result and Discussion Drinking-Water Handling Practice at Home (n=635)
Result and Discussion Latrine and hand washing facilities availability, utilization and cleanse(n= 635)
Conclusion The aim of any safe water supply program/project is to reduce the risk of contamination at least to the lowest level. However, in the study area this objective was not achieved. Four major problem areas of public water supply were identified: – Quality with sensitive indicators coliform and E.Coli organisms indication of contamination – Risk factors for contamination from source to household level – Knowledge gap on disease prevention using safe water and contamination of water – Quantity acute shortage & none functionality/lack of reliable preventive operation and maintenance system Ad hoc water quality testing and absence of risk assessment/ sanitary survey in the study area
Conclusion Finally three conclusions can be drawn from this study: – Though, putting in place water supply infrastructure is apriority in any water supply programme/project, the risk of contamination is all ways there regard less of the complexity of the infrastructure. – Availability of the water supply infrastructure does not grantee always the five basic indicators included in the definition of safe water supply : Quantity Quality Cost/ affordability Continuity(24hours/day; 7days/week, 30 days/month, 365days/year) Coverage /accessibility – Once water supply infrastructure is in place hygienically management from source to mouth need systematical well designed and planned interventions at home to achieve the objective of Framework for safe drinking-water
Recommendation Addressing Water Quality strategically As part of O&M As integral part of the water supply system Management Risk identifcation, prioritization & prevention/mi tigation
Actions following the study Result Capacity building training and field level water quality testing equipment Mitigation of risks based on the priority National Drinking Water Quality Monitoring Surveillance Strategy developed with detail financial resource requirement and activities Recent development WSP piloting and framework development