Leakage performance categories (LPCs) based on Infrastructure Leakage Index (ILI) and water losses under various system pressures for developing countries (Liemberger & McKenzie 2005)
| LPC . | ILI . | Water loss in liters/connection/day when the system is pressurized at an average pressure of: . | ||||
|---|---|---|---|---|---|---|
| 10 m . | 20 m . | 30 m . | 40 m . | 50 m . | ||
| A | 1–4 | <50 | <100 | <150 | <200 | <250 |
| B | 4–8 | 50–100 | 100–200 | 150–300 | 200–400 | 250–500 |
| C | 8–16 | 100–200 | 200–400 | 300–600 | 400–800 | 500–1,000 |
| D | >16 | >200 | >400 | >600 | >800 | >1,000 |
| LPC . | ILI . | Water loss in liters/connection/day when the system is pressurized at an average pressure of: . | ||||
|---|---|---|---|---|---|---|
| 10 m . | 20 m . | 30 m . | 40 m . | 50 m . | ||
| A | 1–4 | <50 | <100 | <150 | <200 | <250 |
| B | 4–8 | 50–100 | 100–200 | 150–300 | 200–400 | 250–500 |
| C | 8–16 | 100–200 | 200–400 | 300–600 | 400–800 | 500–1,000 |
| D | >16 | >200 | >400 | >600 | >800 | >1,000 |
Explanation of LPC categories: A: Further loss reduction may be uneconomic unless there are shortages, B: Possibilities for further improvement, C: Poor leakage management, tolerable only if resources are plentiful and cheap, D: Very inefficient use of resources, indicative of poor maintenance and system condition in general.