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environmental health indicators for new zealand: feasibility study

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WatSan_S1: Exceedance of WHO drinking water guidelines <strong>for</strong> microbiological parametersAvailability: Available from ESR from1991 to 2001.Usefulness: Direct measure of the safety of drinking water [microbiological]Quality: Only 87% of the population water supply is registered, hence there is noin<strong>for</strong>mation on the water quality of the remaining 13%. Updated annuallyWatSan_S2: Exceedance of WHO drinking water guidelines <strong>for</strong> chemical parametersAvailability: Available from ESR from 1986 - updated approximately every five yearsUsefulness: Measure of the state of the drinking water contamination.Quality: same as WatSan_S1WatSan_Ex1: Access to safe drinking waterAvailability: Available from ESR from 1986-2001.Usefulness: Good indicator of <strong>health</strong> risk from unsafe potable water.Quality: Same as WatSan_S1.WatSan_Ex2: Access to adequate sanitationAvailability: Not routinely available but can be obtained with some ef<strong>for</strong>t.Usefulness: Good indicator of access to but not quality of sanitation facilitiesQuality:4.8.2 Health IndicatorsWatSan_E1: Outbreaks of water-borne diseasesAvailability: Available from EpiSurv from 1996 to 2002. The data is updated weekly andpublished monthly.Usefulness: Measure of <strong>health</strong> effects due to exposure to contaminants in water.Quality: Underreporting is common.Comment: Clearly distinguishing between water borne and food borne outbreaks can bedifficult.WatSan_E2: Diarrhoea morbidity in childrenAvailability: Not availableUsefulness: Good measure of <strong>health</strong> status of children, especially under conditions ofinadequate water or food hygiene and basic sanitation. Not envisaged to be very relevant toNZ.Quality: Not systematically collected.Comment: Alternative indicator could be the number of children notified with an entericdisease corrected <strong>for</strong> known levels of underreporting.4.8.3 Action IndicatorWatSan_A1: Effective monitoring of recreational waterAvailability: Available from MfE and regional councilsUsefulness: General measure of local authority control over bathing water safetyEnvironmental Health Indicators 19 18 December 2003<strong>for</strong> New Zealand

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