<li><b>Sufficient</b>. The water supply for each person must be sufficient and continuous for personal and domestic uses. These uses ordinarily include drinking, personal sanitation, washing of clothes, food preparation, personal and household hygiene. According to the World Health Organization (WHO), between <b>50 and 100 litres</b> of water per person per day are needed to ensure that most basic needs are met and few health concerns arise. </li>
<li><b>Safe</b>. The water required for each personal or domestic use must be safe, therefore free from micro-organisms, chemical substances and radiological hazards that constitute a threat to a person's health. Measures of drinking-water safety are usually defined by national and/or local standards for drinking-water quality. The <b>World Health Organization (WHO) Guidelines for drinking-water quality</b> provide a basis for the development of national standards that, if properly implemented, will ensure the safety of drinking-water.</li>
<li><b>Acceptable</b>. Water should be of an acceptable colour, odour and taste for each personal or domestic use. [...] All water facilities and services must be <b>culturally</b> appropriate and sensitive to <b>gender, lifecycle</b> and <b>privacy</b> requirements.</li>
<li><b>Physically accessible</b>. Everyone has the right to a water and sanitation service that is physically accessible within, or in the immediate vicinity of the household, educational institution, workplace or health institution. According to WHO, the water source has to be within <b>1,000 metres</b> of the home and collection time should not exceed <b>30 minutes</b>.</li>
<li><b>Affordable</b>. Water, and water facilities and services, must be affordable for all. The United Nations Development Programme (UNDP) suggests that water costs should not exceed <b>3 per cent</b> of household income.</li>