| Value | Category | Cases | |
|---|---|---|---|
| 1 | centralized hot and cold water pipe | 8053 |
17.1%
|
| 2 | centralized cold water pipe only | 1165 |
2.5%
|
| 3 | protected well | 17052 |
36.1%
|
| 4 | unprotected well | 5764 |
12.2%
|
| 5 | transported distribution | 6640 |
14.1%
|
| 6 | spring, river, lake | 7663 |
16.2%
|
| 7 | snow, ice | 816 |
1.7%
|
| 8 | other | 36 |
0.1%
|