September 23, 2008

ESI Wins Contract From the City of Los Angeles

VICTORIA, BRITISH COLUMBIA--(Marketwire - Sept. 23, 2008) - ESI Environmental Sensors Inc. ("ESI", the "Company") (TSX VENTURE:ESV) today announced receipt of a purchase order from the City of Los Angeles for its GroPoint moisture sensor products and related equipment valued at more than $42,000. The sensors and equipment will be used to help the City monitor and control the amount of water applied to a sports field area known as the "Field of Dreams."

"ESI is extremely pleased to assist the City of Los Angeles in helping to manage its water resources more efficiently and productively," said David Porter, Vice President of Sales and Marketing. "The selection of our GroPoint product by one of the largest and most well-known cities in the world further strengthens our growing competitive position in the industry. Going forward, we expect to build greater sales momentum as North American policy makers increasingly embrace soil moisture-based precision irrigation as the most effective way to make every drop of water count and ensure plants and turf receive the precise amount of water that they require to flourish."

The Los Angeles Department of Recreation and Parks maintains more than 15,000 acres of parkland, including 390 neighborhood and regional parks, nine lakes, 176 recreation centres and 372 children's play areas, 13 golf courses, 287 tennis courts, nine dog parks, 59 swimming pools, seven skate parks, seven museums, 24 child care facilities, 30 senior centers, two beaches and an urban forest of one million trees.

About ESI

ESI is a leading manufacturer of patented and proprietary solutions for environments where understanding the presence, movement, and/or amount of water are important. Major market sectors include: Agriculture, Golf and Turf, Scientific Research, Civil Engineering and Crude Oil. ESI solutions have been successfully introduced into more than 40 countries to enable customers to optimize their operations by monitoring the presence and movement of water, managing irrigation systems, and monitoring the integrity of landfill covers. Most recently, the FloPoint(TM) instrument has been introduced to the Oil industry to measure the volumetric presence of water pumped during crude oil extraction for characterization and optimization of the process. ESI differentiates itself by translating the best technology and science available into practical, easy to use solutions. Irrigation managers, Reservoir Engineers, and Scientists have adopted ESI's products for their accuracy, ease of use, repeatability, and ability to operate in challenging environments. ESI is publicly traded on the TSX Venture Exchange under the symbol "ESV". Further information about ESI may be obtained through the Company's website at

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