Croatian ILIs

ILIs in Croatia 2005 to 2014

Since 2000, there has been a slow but definitive rise in understanding of water loss importance in the Western Balkans region. The IWA practical approach was openly presented since 2006 at a few national and regional conferences dedicated to water loss issue (Macedonia 2006, 2008, Croatia 2007). In 2009 the Croatian Association of Water Utilities encouraged water Utilities to start using the IWA methodology and strategies. Water loss issues are now being tackled successfully with practical implementation programs supported by training courses, regular seminars and workshops based on the IWA approach coupled with mentoring of individual Utilities. Also an important support was the ability to have available programs in local languages for simple and fast calculation of water balances and PI.

In the last 2 years new important developments are underway in Croatia; introduction of Benchmarking program for water utilities based on IWA PI methodology and preparation of projects for EU funding applications with leakage reduction programs as the main focus of interest (with recognized key strategies according to IWA practical approach; ALC, Speed and quality of repairs, DMAs, Pressure Management, Apparent losses, IWA Water Balance. In projects evaluations and analyses key PI used are: ILI, l/serv.conn/day, m3/year (and use of NRW in % of input volume are recognized as unreliable for valid evaluation of water losses).

The EU Reference document Good Practices on Leakage Management has been translated into Croatian by Croatian Waters, the country’s Water Regulator, and will be soon available free to all Utilities. It is interesting to mention that one of 16 case studies presented in this document is Water utility Pula from Croatia.

The associated water balance and PI free software EurWB&PICalcs has been recently translated into Croatian by Jurica Kovac, who has provided the validated ILI data below for 25 Croatian Utilities.

croata ili 22 jan 16 b

croatia 22 jan 16

Note: ‘Very Small’ Systems, shown green on the bar chart, have less than 3000 service connections

The System Pressure categories next to the right side axis, and the Leakage Performance categories next to the left axis, are as recommended in the EU Good Practices on Leakage Management. The Class Limits used in the Leakage Performance Categories are consistent with those introduced by Liemberger into World Bank Institute training (2005) for a country with Croatia’s per capita income.

Improved management of excess pressures in several Case Studies to date appears to be the necessary foundation for successful implementation of other complementary leakage control strategies. See articles 2014M, 2013M; Paper 2015H; Presentations 2015K; 2012N

According to the national strategic programs on Financing Water Management (regulated by Croatian waters), it was planned to introduce from 1st January 2015 (currently postponed for 2017) the base for calculating fees paid by Utilities for water use according to the quantity of abstracted water in m3. In the current regulation that is in force, the collection of fees for water use was based on the quantity of water invoiced to the final consumer. Part of the new regulations will specify the coefficients of acceptable technical loss, and the methodology for calculating water losses in water supply systems. This means that different fee categories ‘per m3’ would be used (lower fee for small losses and greater fee for large losses), based on the IWA methodology and the ILI banding categories shown in the graph above. An important issue for this solution is the current lack of accurate data in most of the Utilities (length of mains, number and length of service connections, average pressure), but the new regulations (and requirements following Benchmarking program and EU founding) create conditions to force the necessary improvements.

Today utilities in Croatia (but also numerous utilities in Western Balkans region, for example in neighbouring Slovenia, a new national strategy is in preparation and ILI is one of key PIs) are familiar with IWA approach and many of them very successfully apply various aspects of water loss control. Considering recent history and lessons learned, obviously in our region we can expect further progress and success in efficient water networks management.

The comments on this ILI data by ILMSS Ltd do not purport to represent the opinions or policies of any individuals, Companies and Utilities which assisted in provision of the data.

Future Updates: Countries which already have sufficient good quality ILI data to justify a separate Webpage within Global ILIs are invited to Contact ILMSS Ltd.