| Value | Category |
|---|---|
| 1 | Improved water, boiled or ceramic treatment |
| 2 | Improved water, treated with chlorine |
| 3 | Improved water, untreated |
| 4 | Unimproved water, boiled or ceramic treatment |
| 5 | Unimproved water, treated with chlorine |
| 6 | Unimproved water, untreated |
| 0 |