ETHEKWINI WATER & SANITATION: NON REVENUE WATER BRANCH YOUTH INNOVATION CHALLENGE Simon Scruton, Pr Eng, MSc. eThekwini Water and Sanitation Manager Non-Revenue Water

Structure of Presentation eThekwini Quick Stats Water Resource Overview EWS Status Quo Real Loss Approach Apparent Loss Approach Challenges

eThekwini Municipality Quick Stats 3,4 million people properties Supply ±910 Ml/day of water from 9 Treatment Works Treat 500 Ml/d of Waste Water 263 Water Reservoirs 27 Waste Water Treatment Works km of sewer mains km of water mains water connections

Understanding NRW What is NRW? What causes NRW? What is the average NRW for SA and Africa? What are real losses and commercial losses? What is the best case for acceptable losses in the short term and medium term?

Non-Revenue Water International NRW benchmark EWS 35.5%

Unbilled Authorized Consumption R p.a. Apparent Losses R p.a. Real Losses R p.a. Non-Revenue Water R p.a. Counting the costs

The M 3 I Index Annual cost of NRW for KZN = R Approximate cost of a C Class Mercedes = R Annual M 3 I for KZN (conservative) = 2723 A new Mercedes every week for 52 years! Size of a rugby field = 7000m2 Parking space for Mercedes = 10m2 4 Rugby fields of Mercedes lost on every year!

EWS NRW Status Quo Same level of SIV 6 years later

Managing distribution systems can seem like juggling Theft and Vandalism and Illegal Connections Ageing Assets Insufficient Staff Improve Customer service Low Tariffs and increases Water Operations Manager And to ensure that there is sufficient Water!

The state of our pipelines

Infrastructure Leakage Index (ILI)6,3 Leakage Performance Category B1 Growth in System Input Volume per annum < 1,3% Inefficiency of Use of Water Resources 19,0 % Non-Revenue Water by Volume25,0 % No Drop Assessment Score90,0 eThekwini NRW Targets

NRW Capital Budgets

Real Loss Reduction Approach

Apparent Loss Reduction Approach

Challenges Uncontrolled migration into rural and informal areas – formal address base a problem Some reservoir supply is intermittent due to excessive demand Infrastructure failure rates are high High NRR (natural rate of rise of leakage) Mains failure rate is 8 x higher than desirable; Connection failure rate is 19 x higher than desirable Leaks not reported in some areas and navigation to fault can be a problem in some areas Vandalism of infrastructure Illegal connections, Non compliance and Willingness to pay a problem in some areas

Final Words: It will be difficult to solve a social problem with a technical solution Technical solutions need not only to be created but: Installed (equipment, data warehousing, change management) Maintained And be financially viable. POPI Act

Thank you / Siyabonga.