EWRA achievement
• Water balance in general form is the deference between
produced water and the authorized consumption which have a
returned value.
 System Input = Consumption + Losses
 Losses = System Input - Consumption
System
Authorized
Consumption
Input
Volume
(corrected
for
known
errors)
Billed
Authorized
Consumption
Unbilled
Authorized
Consumption
Apparent
(commercial)
Losses
Water
Losses
Real
(physical)
Losses
Billed Metered Consumption
Billed Unmetered Consumption
Revenue
Water
Unbilled Metered Consumption
Unbilled Unmetered Consumption
Unauthorized Consumption
Customer Meter Inaccuracies and
Data Handling Errors
Leakage on Transmission and
Distribution Mains
Leakage and Overflows at Storage
Tanks
Leakage on Service Connections
up to point of Customer Meter
Non
Revenue
Water
 The Egyptian water production is within 21 Million m3 daily.
 In Egypt we have a percentage of water loses within 30%.
 In Egypt we lose (6 – 8) Million m3 daily.
 International percentage allowances of water loses within
15%.
Reference: TIEX expert mission in Egypt
Cairo, Egypt - 30 March to 3 April 2008
Installation of production meters and replacement of failed
consumer meters:
A. Installation of meters on water production locations in water treatment
plants to measure produced water (Surface water and groundwater).
B. Review all meters installed on consumer connections as follows:
• Replace non working meters.
• Install new meters for non metered properties.
• Ensure renewal of calibration license for working meters.
Installation of District Meter Areas:
A. Apply DMAs to control water amount in inflow and outflow of
distribution system.
B. Install bulk meters in DMAs to measure inflow and outflow of each
district.
Installation of raw water meters
•
•
 EWRA following-up leak detection system with companies in
order to minimize water lost through leakage.
 EWRA choosed Company was Cairo Water Company
Separate department for leak detection system
All required equipment
Longest network.
Oldest network.
 the total repairs done saved about 6,935,000 m3.