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Table 2
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
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