IDEXX Laboratories Receives ISO 9001:2000 Certification

IDEXX’s worldwide headquarters strengthens its commitment to quality and service excellence for customers

Westbrook, Maine, July 20, 2006—IDEXX Laboratories, Inc. (NASDAQ: IDXX), announced today that its Westbrook, Maine facilities—including the corporate headquarters and IDEXX’s major R&D, manufacturing and customer service locations—have received ISO 9001:2000 certification. This brings the number of IDEXX locations certified to ISO standards to more than a dozen and provides independent validation that IDEXX’s quality management system meets the high standard of quality demanded by the International Organization for Standardization (ISO).

“Achievement of ISO 9001:2000 in the Westbrook facilities demonstrates IDEXX’s commitment to industry leadership and our employees’ dedication to providing the highest quality products and services for our customers worldwide,” said CEO and President Jonathan Ayers. “This certification is a critical step in the growth and development of our company. Continual improvement and commitment to quality are critical elements of IDEXX’s mission.

"In today's competitive business environment, effective quality management is indispensable, and ISO 9001:2000 certification assures IDEXX customers that we have an internationally recognized quality management system," Ayers continued. "Customers want to be confident that they are doing business with an organization that can meet or exceed their needs in a timely manner. With the ISO 9001 certification, customers can be sure that IDEXX is just that kind of organization."

The Westbrook facilities certified are employed in the development and manufacturing of water microbiology tests including the Colilert®-18 line, production animal services diagnostics kits including the HerdChek® BSE-Scrapie Test Kit, Dairy SNAP® antibiotic residue tests, and companion animal products including diagnostics instruments, SNAP® rapid assay products and digital radiography systems.

The successful ISO certification audit was conducted by SGS Systems & Services Certification, the world’s leading inspection, verification, testing and certification company. SGS is recognized as the global benchmark for quality and integrity. With 43,000 employees, SGS operates a network of about 1,000 offices and laboratories around the world.

About the International Organization for Standardization

The International Organization for Standardization, www.iso.org, based in Geneva, Switzerland, is the source of the ISO 9000 and ISO 14000 families of quality and environmental management standards, respectively, and some 15,000 International Standards for business, government, and society. ISO is a network of national standards institutes from 146 countries working in partnership with international organizations, governments, industry, business and consumer representatives. ISO 9001:2000 is an internationally recognized quality management standard for ensuring the highest possible quality in business-to-business dealings, focusing on meeting customer quality and applicable regulatory requirements, enhancing customer satisfaction and continually improving business performance.

About IDEXX Laboratories

IDEXX Laboratories, Inc., is a leader in companion animal health, serving practicing veterinarians around the world with innovative, technology-based offerings, including a broad range of diagnostic products and services, practice-management systems, and therapeutics. Our products enhance the ability of veterinarians to provide advanced medical care and to build more economically successful practices. IDEXX is also a worldwide leader in providing diagnostic tests and information for the production animal industry and tests for the quality and safety of water and milk. Headquartered in Westbrook, Maine, IDEXX Laboratories employs more than 3,000 people and offers products to customers in over 100 countries.

Note Regarding Forward-Looking Statements

This press release contains statements about the Company’s business prospects that are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. These statements are based on management's expectations of future events as of the date of this press release, and the Company assumes no obligation to update any forward-looking statements as a result of new information or future events or developments. Actual results could differ materially from management’s expectations. Factors that could cause or contribute to such differences include the following: the Company’s ability to develop, manufacture, introduce and market new products and enhancements to existing products; the effectiveness of the Company’s sales and marketing activities; the Company’s ability to develop, license or obtain rights to new technologies; the Company’s ability to identify acquisition opportunities, complete acquisitions and integrate acquired businesses; the impact of competition and technological change on the markets for the Company’s products; the effect of government regulation on the Company’s business, including government decisions about whether and when to approve the Company’s products and decisions regarding labeling, manufacturing and marketing products; the impact of distributor purchasing decisions on sales of our products that are sold through distribution; changes or trends in veterinary medicine that affect the rate of use of the Company’s products and services by veterinarians; the Company’s ability to obtain patent and other intellectual property protection for its products, successfully enforce its intellectual property rights and defend itself against third party claims against the Company; disruptions, shortages or pricing changes that affect the Company’s purchases of products and materials from third parties, including from sole source suppliers; the effects of government regulatory decisions, customer demand, pricing and other factors on the realizability of the Company’s inventories; the Company’s ability to manufacture complex biologic products; the effects of operations outside the U.S., including from currency fluctuations, different regulatory, political and economic conditions, and different market conditions; and the loss of key employees. A further description of these and other factors can be found in the Company’s Annual Report on Form 10-K for the year ended December 31, 2005 (1.5 MB) and the Quarterly Report on Form 10-Q for the quarter ended March 31, 2006, (874 KB) in the section captioned “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Contact:

Investors: Merilee Raines, Chief Financial Officer, 1-207-556-8155

Media: Elisabeth Richards, Business Communications Manager, 1-207-556-8348