| WATER SERVICE PROVIDER | Reported interruption | Unreported interruptions | ||||
| Now (x) | Before 2004 (y) | Difference (x − y) | Now (q) | Before 2004 (r) | Difference (q − r) | |
| CHEMOSIT | 14.8 | 16.2 | −1.4 | 15.7 | 19.6 | −3.9 |
| KIWASCO | 13.5 | 17.4 | −3.9 | 16.4 | 20.4 | −4.0 |
| MIKUTRA | 19.5 | 18.04 | 1.5 | 20.9 | 23.4 | −2.5 |
| SNWSCO | 15.5 | 21.4 | −5.9 | 19.3 | 20.7 | −1.4 |
| MOGOMBET | 10.2 | 13.2 | −3.0 | 12.1 | 14.8 | −2.7 |
| BOYA | 12.1 | 14.6 | −2.5 | 12 | 12.7 | −0.7 |
| NYASARE | 15.2 | 15.1 | 0.1 | 17.4 | 20.3 | −2.9 |
| OVERALL MEAN | 14.6 | 17.7 | −3.1 | 16.9 | 20.2 | −3.3 |