SWWC Southwest Water (MM)

SouthWest Water Company (NASDAQ:SWWC), a leading provider of water and wastewater services through utility ownership and contract operations, will release its 2007 fourth quarter and full year financial results on Monday, March 17, 2008 (before market hours). The company will host a conference call later that day at 1:30 p.m. Pacific time (4:30 p.m. Eastern) to discuss financial results and operations. The call, broadcast live over the Internet by Thomson/CCBN, can be accessed in the following ways: At SouthWest Water�s website: www.swwc.com. A replay of the call will also be available on the website. Through Thomson StreetEvents: Individual investors can listen to the call at www.earnings.com. Institutional investors can access the call via www.streetevents.com. An audio replay of the call will be available on March 17 at 3:30 p.m. (Pacific time) for 7 days. To access the replay, dial (888) 286-8010 (international callers please dial 617-801-6888) and use the passcode 90008539. SouthWest Water Company provides a broad range of operations, maintenance and management services, including water production, treatment and distribution; wastewater collection and treatment; customer service; and utility infrastructure construction management. The company owns regulated public utilities and also serves cities, utility districts and private companies under contract. More than two million people in 10 states depend on SouthWest Water for high-quality, reliable service. Additional information may be found on the company's website: www.swwc.com. For Further Information: SouthWest Water Company � PondelWilkinson, Inc. 624 S. Grand Ave., Suite 2900 1880 Century Park East, Suite 700 Los Angeles, CA 90017 Los Angeles, CA 90067 (213) 929-1846 (310) 279-5969 www.swwc.com www.pondel.com CONTACT: CONTACT: DeLise Keim Robert Jaffe Vice President, Corporate Communications