National estimates and admin2 summaries resulting from the modelling procedures for access to improved drinking-water source, improved sanitation, and open defecation.

aMDG 7C is to halve the proportion of the population without sustainable access to safe drinking water and basic sanitation. Classification of achievement is based on figures produced by the WHO/UNICEF JMP for Water Supply and Sanitation for 1990 and 2010 [91].bMedian administrative area standard deviation (SD) is taken from the posterior distribution for standard deviation at the administrative area level generated by the hierarchical model, and reflects the amount of data available for a given country (increased SD reflects greater uncertainty and less data).cRGI is a measure of relative inequality in access sub-nationally within a given country given national coverage levels. Negative values indicate a lower than expected inequality, whilst positive values indicate greater than expected inequality; ↓ indicates a score significantly lower than 0 and ↑ indicates a score significantly higher than 0.aMDG 7C的目标是将无法持续获得安全饮用水与基本卫生设施的人口比例减半。其达成情况的分类依据为世界卫生组织（World Health Organization, WHO）与联合国儿童基金会（United Nations Children's Fund, UNICEF）供水与卫生联合监测计划（Joint Monitoring Programme, JMP）于1990年和2010年发布的数据[91]。 b行政区域层面标准差（Standard Deviation, SD）的中位数取自分层模型生成的行政区域层级标准差后验分布，其反映了特定国家可获取的数据量（标准差越高，代表不确定性越强、可用数据越少）。 c相对不平等指数（RGI）是在给定国家全国覆盖水平的前提下，衡量该国国内地方层面获取服务的相对不平等程度的指标。负值代表不平等程度低于预期水平，正值则代表不平等程度高于预期水平；其中↓表示得分显著低于0，↑表示得分显著高于0。