Compass Minerals (NYSE: CMP) will release its third-quarter 2008 financial results after the close of the markets on Tuesday, October 28, 2008, and will discuss its results on a conference call on Wednesday, October 29, at 9:00 a.m. ET.

To access the conference call, interested parties should visit the company’s website at www.CompassMinerals.com or dial (877) 228-7138. Callers must provide the conference ID number 68327689. Outside of the U.S. and Canada, callers may dial (706) 643-0377. Replays of the call will be available on the company’s website for two weeks. The replay can also be accessed by phone for seven days at (800) 642-1687, conference ID 68327689. Outside of the U.S. and Canada, callers may dial (706) 645-9291.

About Compass Minerals

Based in the Kansas City metropolitan area, Compass Minerals is a leading producer of minerals, including salt, sulfate of potash specialty fertilizer and magnesium chloride. The company provides highway deicing salt to customers in North America and the United Kingdom and specialty fertilizer to growers worldwide. Compass Minerals also produces consumer deicing and water conditioning products, ingredients used in consumer and commercial foods, and other mineral-based products for consumer, agricultural and industrial applications. Compass Minerals also provides records management services to businesses throughout the U.K.

Compass Minerals
Rodney L. Underdown, 913-344-9395
Chief Financial Officer
or
Peggy Landon, 913-344-9315
Director of Investor Relations and
Corporate Communications