NONNON--REVENUE WATER BRANCHREVENUE WATER BRANCH

OVERVIEW OF NRW INITIATIVES IN DURBAN OVERVIEW OF NRW INITIATIVES IN DURBAN

SOUTH AFRICASOUTH AFRICA

Presentation African Utilities WeekPresentation African Utilities Week

BY: SIMON SCRUTON – MANAGER: NRW BRANCH Ethekwini Municipality

It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change – Charles Darwin

Contents of Presentation

� eThekwini Municipality Stats

� System Characteristics

� NRW Strategic Plan Objectives

� Delivery Model

� Targeted Figures

� Real Loss Interventions

� Apparent Loss Interventions

� Trends

• 3,5 million people

• 646 000 properties

• Supply 900 Ml/day of water from 9 Treatment Works

• Treat 500 Ml/d of Waste Water

• 263 Water Reservoirs

• 27 Waste Water Treatment Works

• 7 000 km of sewer mains

• 12 000km of water mains

• 440 000 water connections

• Combined annual expenditure of R2.5bn (2008/09)

• Combined annual expenditure of R4.1bn (2009/10)

• Municipal budget 2009/10 R23bn

eThekwini Municipality Quick Stats

System OverviewNorth Operational Area:3000km of Water Mains

120000 Service Connections214 PRVs

79 Reservoirs

South Operational Area:4500km of Water Mains

180000 Service Connections200 PRVs

104 Reservoirs

West Operational Area: 3600km of Water Mains

120000 Service Connections650 PRVs

78 Reservoirs

NRW Strategic Plan Objectives

� NRW by volume for 2006/2007 – 30.6%� NRW by volume for 2007/08 – 36.4%� Target for June 2013 – 28% loss (R175m pa

savings)� Target for June 2018 – 25% loss (ILI 4.5)

� Main drivers:-� Reduce real losses

� AC Mains replacement� Active leak detection� Pressure reduction� Rezoning� Improving reservoir integrity

� Reduce apparent losses� Illegal connection rectification� Billing data integrity improvements� Improve meter accuracy

NRW Strategic Plan Objectives

� The delivery model allows for:-

� Area specific support

� Dedicated management of NRW activities

� Accountability for performance

� Cost effective management of EWS activities (Billing analysis, Leak detection, Advanced pressure management)

NRW Programme Organogram

IWA Standard Water Balance

Water Exported Billed Water m3/day Exported± x % Billed m3/day

Own Authorised ± x % RevenueSources Consumption Billed Metered Water m3/day m3/day Consumption m3/day± x % ± x % m3/day ± x %

Authorised ± x %Consumption Billed Unmetered

m3/day Consumption± x % m3/day

± x %Unbilled Metered

ConsumptionUnbilled Authorised m3/day

System Water Consumption ± x %Input Supplied m3/day Unbilled Unmetered

m3/day m3/day ± x % Consumption± x % ± x % m3/day

Imported ± x % Non-revenueWater Unauthorised Water

m3/day Apparent Consumption m3/day± x % Losses m3/day ± x %

Water m3/day MeteringLosses ± x % Inaccuracies m3/day m3/day± x % Mains Leaks

Real m3/dayLosses Reservoir Overflows

m3/day m3/day Service connection± x % Leaks

m3/day

Targeted NRW Reduction Figures

The higher the pressure – the bigger the loss!

SIV Reduction – Real Losses

� Rezoning - New Pressure Standard -2.5bar – 6bar

� Advanced pressure management (optimising existing + controllers)

� Active prv Maintenance

� GSM based failure detection devices on prv’s

� Leak detection

� AC mains relay (incl rezoning + replace connection pipes)

� Analysis of Faults data to improve speed and quality of repairs

� Reservoir overflows (incl response time)

� Reservoir integrity (leaks)

Advanced Pressure Management in the Durban CBD

Results to Date:

SIV Reduction (Cont)

� Pilot project to fit GSM based alarms on downstream side of pressure reducing valves (prv) to detect prv failure

� Inexpensive and simple 2 point prv control introduced at 100 sites to lower pressure during all off-peak times

� Reactive repairs – 24 hour call centre - Repair ±300 faults per day

Leak Detection� Yearly Contracts in different

operational areas

� Level 1, 2, 3, 4, 5 leak detection

� Stats 31/01/2010� Length of Mains survey =

24753km

� Leaks found = 17709 (Visible, Non-visible, SC, Main Line, Valve Leaks, Meter leaks)

� Leaks Repaired = 14723! (UTL is an issue)

� Change in methodology to sweep with plumbers 1st to stabilise an area

• New standards for meter installations• Change out programme for meters 40mm and

greater and older than 10 years (Top 1000) Ensure Top 200 meters < 5 years old

• Change out programme for domestic meters older than 20 years

• Checking Council databases for properties with existing buildings or electrical connections that don’t have a water connection

• Checking of all Government owned properties for multiple connections

• Checking properties where connections were previously removed

• 75 Custody Transfer Points – Bulk Purchase from Umgeni Water

• Top 17 sites account for 99% of volume purchased• R3m / day

Apparent / Commercial Losses

Corrective Actions – Unbilled

Unmetered Consumption

� Programme to rectify all consumers with water on site but no registered connection

� New policy approved by Council 03 December 2009 and 3 month amnesty will be offered per ward

� Task team has been formed and communication has commenced

� Key activities will be data cleansing, Councilor liaison consumer liaison and education, meter installation and enforcement

� Formal addresses a problem and on-site billing will be piloted

Allied Interventions

� Asset management is being implemented across the Unit

� Risk management has been implemented across the Unit

� Data cleansing and launch of the new prv database

� Performance management of senior staff

� Increased publicity and communication

� Buy-in from all Deputy Heads and recognition that the reduction of NRW is a key strategic initiative

REAL LOSS REDUCTION:

Pressure reduction (rezoning) Number of new PRV sites (all sources) 350 PRV's Baseline Target 20 40 60

(AC Mains: 100; NRW PSC's: 100; EWS Design: 21;

POT: 100; EWS NRW:30)

Achievement to

date9 24 89

Performance to date

(%)45% 60% 148%

Advanced control recommission existing time controllers 50 sites Baseline Target 0 12 24

Achievement to

date0 8 17

Performance to date

(%)0% 67% 71%

Advanced control commission new controllers 50 sites Baseline Target 2 2 2

Achievement to

date2 2 2

Performance to date

(%)100% 100% 100%

Leak detection and repair length of mains surveyed (km) 18000km Baseline Target 1600 3200 4800

Achievement to

date2759 3910 5405

Performance to date

(%)172% 122% 113%

Mains replacement to be laid and commissioned (km) 700km Baseline Target 60 120 180

Achievement to

date53 157 185

Performance to date

(%)88% 131% 103%

NRW (PSC), AC

Mains, Design

POT, NRW

(EWS)

NRW (POT)

NRW (PSC)

AC Mains

KPM’s Monitored by the Head EWS

Trends

World Bank Benchmarking Initiative

Dennis Mwanza –World Bank Kenya

dmwanza@worldbank.org

Conclusions� In order for any NRW reduction

intervention to be successful, the entire water company must fully support all aspects of loss management and provide a coordinated effort to reduce all NRW.

� Consumer education is equally important. Unless the consumers accept and subscribe to our policies we will forever be removing vast numbers of illegal connections and penalising those who do not pay.

Conclusions

� Stricter policy and enforcement enable the company to improve performance. This will be pivotal with the suspected ICR programme.

� The lowering of the design pressures is having a great impact (NRW reduction, bursts, pipeline life)

� The tide has started to turn and the results are becoming visible.

Conclusions

� This programme has realised savings of R210m in the past 3 financial years at EWS at a cost of R78.6m

Our enemies are innovative and resourceful, and so are we. They never stop thinking about new ways to harm our country and our people, and neither do we – George Bushism

Thank you.