Liemberger & Partners

Liemberger & Partners works for clients around the world, including the global leader of NRW management, the Miya Group (

The philosophy of Liemberger & Partners to provide the best possible NRW advice and NRW management services has not changed and therefore the much acclaimed multi-lingual water balance and water loss performance indicator software WB-EasyCalc is still freely available.


The first version of WB-EasyCalc was designed in 2006 to help water utilities and consultants properly apply the IWA Water Loss Specialist Group Methodology.

During the last 10 years it has become the preferred NRW analysis tool for water utilities around the world.

To celebrate its 10th anniversary, version 5 has been released in August 2016 and after correction of a few bugs it was re-named to version 6 in 2019.

The latest version of WB-EasyCalc is 6.17 (August 2021). Please use the download button or check out our Github repo!


If you like to contact Liemberger & Partners please use contact form.

Company Information

Liemberger & Partners GmbH is an independent consulting firm highly specialised in the analysis and optimisation of water utilities. Together with its international associates, L&P is able to provide world class consulting services to clients around the world.

On the technical side, the scope of services includes:

  • Non-Revenue Water (NRW) Assessment

  • Water Audits, Performance Indicators, Benchmarking

  • Water Loss Reduction and Leakage Management

  • Improvement of Metering, Billing and Collection Efficiency

  • Pressure Reduction and Management

  • Analysis and Improvement of Operations and Maintenance

  • Re-establishment of Continuous (24/7) Supply

  • Training and Transfer of Technology

On the financial side, L&P’s services include:

  • Economic Level of Leakage (ELL) Establishment

  • Investment Planning for Network Rehabilitation and Loss Reduction

  • Cost Estimates for Water Loss Reduction Projects

The scope of services regarding procurement procedures related to the above listed topics includes:

  • Development of Private Sector Participation (PSP) Projects

  • Preparation of Performance Based NRW Reduction Projects

  • Selection of Performance Indicators and Establishment of Contractual Targets

  • Preparation of Terms of Reference for Consultants

  • Development of Technical Specifications for Bidding Documents