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Table 2

Scoring of deterioration

ScorePercentage of old pipeline (%)Percentage of ineffective water (%)
10 <0.5 <1.5 
0.5–1.0 1.5–3.0 
1.0–1.5 3.0–5.0 
1.5–2.0 5.0–7.5 
2.0–2.5 7.5–10.0 
2.5–5.0 10.0–12.5 
5.0–10.0 12.5–15.0 
10.0–20.0 15.0–20.0 
20.0–30.0 20.0–30.0 
30.0–50.0 30.0–50.0 
≥50.0 ≥50.0 
ScorePercentage of old pipeline (%)Percentage of ineffective water (%)
10 <0.5 <1.5 
0.5–1.0 1.5–3.0 
1.0–1.5 3.0–5.0 
1.5–2.0 5.0–7.5 
2.0–2.5 7.5–10.0 
2.5–5.0 10.0–12.5 
5.0–10.0 12.5–15.0 
10.0–20.0 15.0–20.0 
20.0–30.0 20.0–30.0 
30.0–50.0 30.0–50.0 
≥50.0 ≥50.0 
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