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Table 5

Assessment criteria for reliability of urban water supplies

 Aderibigbe et al. (2008) Akosa (1990) Andey & Kelkar (2009) Asian Development Bank (2007) Ayoub & Malaeb (2006) Baisa et al. (2010) Caprara et al. (2009) Gulyani et al. (2005) Howard (2002) Mycoo (1996) Pan American Health Organization (2001) Pattanayak et al. (2005) Shah (2003) Thompson et al. (2000) Virjee & Gaskin (2010) Widiyati (2011) Zérah (1998, 2000, 2002)
Frequency of supply per weeka ✓    ✓             
Frequency of supply in days per week      ✓ ✓        ✓   
Duration of supply in hours per day   ✓ ✓  ✓ ✓ ✓   ✓ ✓ ✓ ✓ ✓ ✓ ✓ 
Fraction of the time water is available  ✓                
Frequency and length of service interruptions          ✓        
Interruption in supply in the previous week         ✓         
Pressure          ✓       ✓ 
Proportion of systems with intermittence           ✓       
Proportion of population served by intermittent systems           ✓       
 Aderibigbe et al. (2008) Akosa (1990) Andey & Kelkar (2009) Asian Development Bank (2007) Ayoub & Malaeb (2006) Baisa et al. (2010) Caprara et al. (2009) Gulyani et al. (2005) Howard (2002) Mycoo (1996) Pan American Health Organization (2001) Pattanayak et al. (2005) Shah (2003) Thompson et al. (2000) Virjee & Gaskin (2010) Widiyati (2011) Zérah (1998, 2000, 2002)
Frequency of supply per weeka ✓    ✓             
Frequency of supply in days per week      ✓ ✓        ✓   
Duration of supply in hours per day   ✓ ✓  ✓ ✓ ✓   ✓ ✓ ✓ ✓ ✓ ✓ ✓ 
Fraction of the time water is available  ✓                
Frequency and length of service interruptions          ✓        
Interruption in supply in the previous week         ✓         
Pressure          ✓       ✓ 
Proportion of systems with intermittence           ✓       
Proportion of population served by intermittent systems           ✓       

aUnit not specified.

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