Energie AG Oberösterreich Wasser GmbH

EVN Wasser GmbH

Wasserleitungsverband der Triestingtal- und Südbahngemeinden


The Water Works Association (WWA) supplies the municipalities in the Triesting valley and along the Southern Railway (Südbahn). The association comprises 29 incorporated municipalities, in which water supply is provided from the spring to the tap, i.e. to the final consumer. It is a public corporation with its headquarters in Bad Vöslau.The plenary session, the board and the chair are the institution of WWA.The members of the plenary session are the mayors of the incorporated municipalities.The board consists of eleven members. These are the chair, the deputy chair, and nine further members. They are elected  by the plenary session. The chair is the association´s public representative.

The internal Management is subject to director and deputy director.

The WWA is completely self-sufficient and does not receive any subsidies whatever. No dividends accrue to the municipalities, profits remain with the association and are set up as reserve funds for future investments. All operating expenditures, amortization charges, loan repayment, the build-up of reserves, etc., are exclusively financed out of revenues. These arise from water bills, access charges and fees for water metres.

The association supplies a total of about 37.000 households with water, which corresponds to some 130.000 individuals.


Badnerstraße 88, A-2540 Bad Vöslau
Phone: 02252/76273
Fax: 02252/76167-44
Mail: wlv@wlv-voeslau.at

Website: www.wlv-voeslau.at

CEO: Franz Gartner 

Founding year: 1927

Member of IAWD since: 1994

Water distribution (m³/year): ~11.500.000

Wasserleitungsverband Nördliches Burgenland


Wiener Wasser



Bosnia and Herzegovina

A.D. Vodovod i Kanalizacija Bijeljina



Sofiyska Voda JSC



Regensburger Energie- und Wasserversorgung AG Co KG (REWAG)



Greflingerstraße 22, 93055 Regensburg
Phone: 0941-601-0
Fax: 0941-601-2550
Mail: info@rewag.de

Website: www.rewag.de

CEO: Olaf Hermes

Founding year: 1976

Member of IAWD since:

Water distribution (m³/year): ~ 11.000.000

Stadtwerke Passau GmbH


Zweckverband Bodensee - Wasserversorgung


Zweckverband Wasserversorgung Fränkischer Wirtschaftsraum




Szegedi Vízmű Zrt.

Vízmû logo direct color

    • 1840  launch of Szeged’s pipeline service
    • 1887  start of Szeged’s water supply
    • 1904  start of public-drinking water service
    • 1949  Establishing the Szegedi water- and sewerage Company
    • 1985  establishing current water production-capacity
    • 1994  contract with Veolia’s predecessor
    • 1998  handover of Szeged wastewater treatment plant-phase I/A (mechanical cleaning)
    • 2003  start of ISPA investment(drainage, biological cleaning)
    • 2008  end of ISPA investment
    • 2013  operating licence
    • 2016  project of drinking water quality improvement


    • Szeged: Asset rental contract until 2024
    • Algyő: concession until 2018 + 5 years

    Utility owners

    • local municipalities

    Operated utility asset:  EUR 145 million

    Main activities:

    • Drinking water service
    • Sewege disposal and biological waste water treatment
    • Rain water disposal
    • Water utility-reconstruction 

    DATA OF 2017

    Drinking water-number of connections: 31 358
    Number of drainage-connections: 28 367
    Amount of produced water: 11 753 504 m3
    Drinking water sold: 8 558 646 m3
    Disposed waste water: 18 655 610 m3
    Length of water network: 689 km (Budapest- München)
    Length of sewerage: 568 km (Budapest – Salzburg)
    Length of open ditches: 247 km


    • Independent corporate governance
    • Application of professional aspects
    • Politics-free management
    • Investor’s support and strict control
    • Exercising ownership rights via general assembly
    • municipality negotiates with company through their professional staff and elected committies,mainly about development and reconstruction issues


    88. Tisza Lajos krt., Szeged, 6720
    Phone: +3662-558855
    Fax: +3662-558800
    Mail: vizmu@szegedivizmu.hu

    Website: www.szegedivizmu.hu

    CEO: Zoltán Istókovics

    Founding year: 1949

    Member of IAWD since: 2017

    Water distribution (m³/year): ~12.622.440



    Regionalni Vodovod Crnogorsko Primorje



    Apaserv Satu Mare


    Compania Apa Brasov SA


    S.C. Apaserve Satu Mare S.A.

    SC Apa Nova Bucuresti SA





    JKP Vodovod Beograd

    PUC for water supply sewage Nis

    Vodovod Subotica

    Vodovod Zrenjanin



    Gemeinde St. Moritz - Wasserversorgung








    Association for water protection and preservation in the South of Serbia (WASS)



    Wasserversorgung Zürich



    Water Supply and Sewerage Association of Albania (SHUKALB)



    Austrian Association for Gas and Water (OVGW)

    OeVGW Logo
    Founded in 1881, OVGW has worked to promote the Austrian gas and water supply industries and associated sectors in all matters of scientific research, technology, business and legislation. OVGW is a non-profit organization based upon voluntary membership.

    Of focal concern is state of the art, research and development in the drinking water sector are at the cutting edge of science and technology.
    OVGW represents members' interest vis-à-vis public authorities, corporations and other institutions.
    OVGW advises members in business and technical matters.
    OVGW maintains a network with other professionals in the field, decision makers and public officials - both nationally and internationally.
    OVGW compiles rules and guidelines for the Austrian water sector, setting the state of the art.
    OVGW promotes and coordinates the sustainable and adequate supply of clean drinking water in Austria and protection of drinking water resources.
    Furthermore, OVGW funds research projects, certifies products and professionals in the water sector, organizes trainings and conferences.


    Schubertring 14, 1010 Vienna
    0043 (1) 513 15 88 0

    Website: www.ovgw.at

    CEO: Michael Mock

    Founding year: 1881

    IAWD Member since: 2016


    Bosnia and Herzegovina

    Aquasan network in BiH



    Bulgarian Water Association (BWA)



    Water and Wastewater Association of Kosovo (SHUKOS)



    Waterworks Association of Montenegro (UVCG)


    Republic of Macedonia

    Association of public service providers of Republic of Macedonia (ADKOM)



    Romanian Water Association (ARA)



    Association of Water Technology and Sanitary Engineering of Serbia (UTVSI)



    E. Hawle Armaturenwerke GmbH

    Siemens AG Österreich

    University of Natural Resources and Life Sciences



    Diehl Metering GesmbH


    Diehl Metering companies have shaped the history of metering for more than 150 years. As a full-service provider, we offer our customers the complete process chain from measuring instruments to data management from a single source. The Vienna-based Diehl Metering GesmbH serves the markets in Austria, Eastern Europe as well as the so-called "stan" countries in Central Asia with Diehl Metering products and solutions. Furthermore, the company operates a test station for bulk water meters up to DN 1,000 mm in cooperation with the Vienna city authorities.


    Hainburger Straße 33
    1030 Wien
    Tel.: 01 716 70 22

    Website: www.diehl.com

    CEO: Michael Hradecky

    Founding year: 1993 as Elin Wasserwerkstechnik GmbH

    Member of IAWD since: 1996

    Hammerer System Messtechnik - Ingenieurberatung

    hydrophil GmbH



    Institute for Water Resources Planning "Jaroslav Cerni"