OAKVILLE, Ontario, June 4, 2003 - ZENON Environmental Inc. (TSX:  ZEN and ZEN.A) will receive the esteemed Stockholm Industry Water Award for its commitment to creating technologies that help to solve global water problems.

"I anticipate that the ZeeWeed® membrane technology will not only have a major impact on future technologies globally, but it will also open new avenues in handling water scarcity problems and implementing sustainable water strategies focusing on re-use, re-cycle and closing material cycles," affirmed Mr. Björn Rosén, Chairman of the Nominating Committee. 

The award, given by the Stockholm Water Foundation in co-operation with the Royal Swedish Academy of Engineering Sciences and World Business Council for Sustainable Development, recognizes ZENON's unique membrane concept, which allows for a low-energy vacuum pressure, similar to human body membranes.

ZENON's ZeeWeed® membrane removes pathogenic microorganisms not eliminated by conventional water treatment and is regarded as a valuable contribution towards safeguarding potable water supplies.  The ZeeWeed® membranes resemble strands of spaghetti sweeping in the treatment tank.  When bundled together, these floating fibres use a low vacuum pressure, which effectively pulls purified water through the membrane and within the hollow fibres out of the tank.  This technology has successfully been applied to both municipal and industrial applications.

Developed in 1992, ZeeWeed® was initially created to treat industrial wastewater.   The first municipal drinking water application came later in 1996 and the company has not looked back since.  Today, ZENON has more than 300 ZeeWeed® plants worldwide and devotes its activities to the manufacture and sale of its proprietary technology.

The Stockholm Industry Water Award was established in 2000 by the Stockholm Water Foundation in co-operation with the Royal Swedish Academy of Engineering Sciences and the World Business Council for Sustainable Development.  A seven-member international Award Committee with representatives of the Founders of the Award as well as Global Water Partnership, International Water Association, and research and development appoint the laureate company.

ZENON is a world leader in providing advanced membrane products and services for water purification, wastewater treatment and water reuse to municipalities and industries worldwide. 

ZENON is proud to be the recipient of the prestigious Stockholm Industry Water Award.   In addition, ZENON has been recognized as Canada's Top Exporter and is also pleased to be ranked as the country's Number One Corporate Citizen by Corporate Knights, a business publication addressing corporate social responsibility.  For the third consecutive year, ZENON has been chosen as one of Canada's Top 100 Employers.

The ZENON group of companies employs over 800 people who operate from locations in North America, Europe, Latin America, Asia and the Middle East.

An S&P/TSX Composite company, ZENON Environmental Inc. trades under the symbols ZEN and ZEN.A.

Additional information is available at the Company's web site www.zenon.com.
The above release was issued today.  For more information contact:
Andrew Benedek
Chairman & CEO, ZENON Environmental Inc.
(905) 465-3030
Nazeli Seferian
Corporate Communications & Investor Relations, ZENON Environmental Inc.
(905) 465-3030 EXT. 3055