SouthWest Water to Report Third Quarter 2009 Financial Results and Host Conference Call on November 9, 2009

The call, broadcast live over the Internet by Thomson Reuters, 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 November 9, 2009 at 5:00 p.m. Eastern Time for 7 days. To access the replay, dial 888-286-8010 (international callers please dial 617-801-6888) and use the passcode 89 95 32 60.

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 a million people in 9 states depend on SouthWest Water for high-quality, reliable service. Additional information may be found on the company’s website: www.swwc.com.

SouthWest Water Company
Vice President, Corporate Communications
DeLise Keim, 213-929-1846