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Purposive sampling was used in selecting types of WSPs from the existing WHO project that recently evaluated WSPs. This includes 14 water districts and 11 health care facilities. The author tested the WSP Index formula in 25 WSPs to determine its applicability (Table 4). An Excel spreadsheet was utilized to facilitate computation.

Table 4

Summary of WSP Index of drinking-water supply providers

 WSP Index (%)
benchmark = 60%
Equal weightsSimple weightsAHP weights
a. Water Districts 
 1. Water District A 61 69 68 
 2. Water District B 76 80 81 
 3. Water District C 64 63 64 
 4. Water District D 66 70 71 
 5. Water District E 79 79 79 
 6. Water District F 71 72 71 
 7. Water District G 75 71 70 
 8. Water District H 63 66 68 
 9. Water District I 69 72 72 
 10. Water District J 91 89 87 
 11. Water District K 89 90 90 
 12. Water District L 70 76 74 
 13. Water District M 70 71 73 
 14. Water District N 52 57 57 
b. Health Care Facilities 
 1. Health Care Facility A 72 73 71 
 2. Health Care Facility B 34 39 37 
 3. Health Care Facility C 82 79 78 
 4. Health Care Facility D 75 71 70 
 5. Health Care Facility E 63 69 69 
 6. Health Care Facility F 80 82 83 
 7. Health Care Facility G 65 61 58 
 8. Health Care Facility H 64 56 54 
 9. Health Care Facility I 89 88 88 
 10. Health Care Facility J 63 63 63 
 11. Health Care Facility K 88 88 89 
 WSP Index (%)
benchmark = 60%
Equal weightsSimple weightsAHP weights
a. Water Districts 
 1. Water District A 61 69 68 
 2. Water District B 76 80 81 
 3. Water District C 64 63 64 
 4. Water District D 66 70 71 
 5. Water District E 79 79 79 
 6. Water District F 71 72 71 
 7. Water District G 75 71 70 
 8. Water District H 63 66 68 
 9. Water District I 69 72 72 
 10. Water District J 91 89 87 
 11. Water District K 89 90 90 
 12. Water District L 70 76 74 
 13. Water District M 70 71 73 
 14. Water District N 52 57 57 
b. Health Care Facilities 
 1. Health Care Facility A 72 73 71 
 2. Health Care Facility B 34 39 37 
 3. Health Care Facility C 82 79 78 
 4. Health Care Facility D 75 71 70 
 5. Health Care Facility E 63 69 69 
 6. Health Care Facility F 80 82 83 
 7. Health Care Facility G 65 61 58 
 8. Health Care Facility H 64 56 54 
 9. Health Care Facility I 89 88 88 
 10. Health Care Facility J 63 63 63 
 11. Health Care Facility K 88 88 89 

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