MILFORD, Mass. — Waters Corporation (NYSE/WAT) reported today first quarter 2013 sales of $430 million, an increase of 2% from sales of $420 million in the first quarter of 2012. In the quarter, the effect of foreign currency translation reduced sales growth by 3%. On a GAAP basis, earnings per diluted share (E.P.S.) for the first quarter were $1.39 compared to $0.98 for the first quarter of 2012. On a non-GAAP basis, E.P.S. increased 7% to $1.07 compared to $1.00 in the prior year quarter. A description and reconciliation of GAAP to non-GAAP E.P.S. is attached and can be found on the Company’s website at https://www.waters.com under the caption Investors.

Commenting on the quarter, Douglas A. Berthiaume, Chairman, President, and Chief Executive Officer, said, “Constant currency sales growth was in line with our expectations and generally stronger than in recent quarters. We are encouraged by demand trends for new instrument systems, especially in China and India, and feel that positive business momentum across our major markets is sustainable.”

As communicated in a prior press release, Waters Corporation will webcast its first quarter 2013 financial results conference call this morning, April 23, 2013 at 8:30 a.m. eastern time. To listen to the call, connect to www.waters.com, choose “Investor Relations” and click on the “Live Webcast”. A replay will be available through April 30, 2013 at midnight eastern time, similarly by webcast and also by phone at 402-998-1308.

About Waters Corporation

For over 50 years, Waters Corporation (NYSE/WAT) has created business advantages for laboratory-dependent organizations by delivering practical and sustainable innovation to enable significant advancements in such areas as healthcare delivery, environmental management, food safety, and water quality worldwide.

Pioneering a connected portfolio of separations science, laboratory information management, mass spectrometry and thermal analysis, Waters technology breakthroughs and laboratory solutions provide an enduring platform for customer success.

With revenue of $1.84 billion in 2012, Waters is driving scientific discovery and operational excellence for customers worldwide.