Scoring of deterioration
| Score . | Percentage of old pipeline (%) . | Percentage of ineffective water (%) . |
|---|---|---|
| 10 | <0.5 | <1.5 |
| 9 | 0.5–1.0 | 1.5–3.0 |
| 8 | 1.0–1.5 | 3.0–5.0 |
| 7 | 1.5–2.0 | 5.0–7.5 |
| 6 | 2.0–2.5 | 7.5–10.0 |
| 5 | 2.5–5.0 | 10.0–12.5 |
| 4 | 5.0–10.0 | 12.5–15.0 |
| 3 | 10.0–20.0 | 15.0–20.0 |
| 2 | 20.0–30.0 | 20.0–30.0 |
| 1 | 30.0–50.0 | 30.0–50.0 |
| 0 | ≥50.0 | ≥50.0 |
| Score . | Percentage of old pipeline (%) . | Percentage of ineffective water (%) . |
|---|---|---|
| 10 | <0.5 | <1.5 |
| 9 | 0.5–1.0 | 1.5–3.0 |
| 8 | 1.0–1.5 | 3.0–5.0 |
| 7 | 1.5–2.0 | 5.0–7.5 |
| 6 | 2.0–2.5 | 7.5–10.0 |
| 5 | 2.5–5.0 | 10.0–12.5 |
| 4 | 5.0–10.0 | 12.5–15.0 |
| 3 | 10.0–20.0 | 15.0–20.0 |
| 2 | 20.0–30.0 | 20.0–30.0 |
| 1 | 30.0–50.0 | 30.0–50.0 |
| 0 | ≥50.0 | ≥50.0 |