Questions About Your Water Service?

Contact us. Golden State Water Company’s customer service representatives are standing by to assist you with any of your questions or concerns. For 24-hour emergency and customer service please call 909-394-2272.

Customer Service

Toll Free: 1-800-999-4033
Local: (909) 394-2272
24 hours, 7 days a week

Corporate Office

To contact us via email, please write us at: customerservice@gswater.com.

Corporate Office Mailing Address

630 E. Foothill Blvd., San Dimas, CA 91773