1) This indicator is just one of several Sustainable Development Goals (SDG) indicators focusing on households' use of drinking water services. Their complete list includes:
- % of population using safely managed drinking water services (drinking water from an improved water source which is located on premises, available when needed and free of faecal and priority contamination) - this indicator is recommended by the European Commission's DEVCO
- % of population using basic drinking water services (drinking water from an improved source provided collection time is not more than 30 minutes for a roundtrip including queuing)
- % of population using limited drinking water services (drinking water from an improved source where collection time exceeds over 30 minutes for a roundtrip to collect water, including queuing)
- % of population using unimproved drinking water services (drinking water from an unprotected dug well or unprotected spring)
- % of population using surface water (drinking water directly from a river, dam, lake, pond, stream, canal or irrigation channel)
For details, see WHO/UNICEF's publication below.
2) In some regions, water sources are prone to significant seasonal differences (e.g. dry/rainy season). Therefore, your assessment must collect data separately for each of the main seasons. At the same time, the baseline and endline data must be collected in the same period of a year; otherwise it is very likely that they will not be comparable.
3) People might use more than one source of drinking water. If this topic is important to your project, add a question asking "Is there any additional source of drinking water used by your household? If so, which one?"
4) Always be very clear on what kind of water you are asking about - water for drinking can have a different source from water for washing.
5) Ensure that the data collectors are able to differentiate between the different types of water sources (based on an interview only).
6) Consider assessing the gender dimension of access to water by including an additional answer Who usually goes to this source to fetch the water for this household? Answer options can include: 1) adult woman (age 15 or older); 2) adult man (age 15 or older); 3) female child (under 15 years old); 4) male child (under 15 years old); other - specify: .................................
7) USAID uses a similar version of this indicator: "number of households collecting all water for drinking, cooking and hygiene from improved water sources".