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Development and sensitivity analysis of a global drinking water quality index

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Abstract

The UNEP GEMS/Water Programme is the leading international agency responsible for the development of water quality indicators and maintains the only global database of water quality for inland waters (GEMStat). The protection of source water quality for domestic use (drinking water, abstraction etc) was identified by GEMS/Water as a priority for assessment. A composite index was developed to assess source water quality across a range of inland water types, globally, and over time. The approach for development was three-fold: (1) Select guidelines from the World Health Organisation that are appropriate in assessing global water quality for human health, (2) Select variables from GEMStat that have an appropriate guideline and reasonable global coverage, and (3) determine, on an annual basis, an overall index rating for each station using the water quality index equation endorsed by the Canadian Council of Ministers of the Environment. The index allowed measurements of the frequency and extent to which variables exceeded their respective WHO guidelines, at each individual monitoring station included within GEMStat, allowing both spatial and temporal assessment of global water quality. Development of the index was followed by preliminary sensitivity analysis and verification of the index against real water quality data.

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  1. UNEP GEMS/Water Programme c/o Place Vincent Massey, 8th floor, 351 St Joseph Boulevard, Gatineau, QC, K1A 0H3, Canada

    C. J. Rickwood & G. M. Carr

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  1. C. J. Rickwood
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  2. G. M. Carr
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Correspondence to C. J. Rickwood.

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Rickwood, C.J., Carr, G.M. Development and sensitivity analysis of a global drinking water quality index. Environ Monit Assess 156, 73–90 (2009). https://doi.org/10.1007/s10661-008-0464-6

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