Main Office 
Directions

450 Walnut Meadows Drive
Oakley, CA 94561

P.O. Box 1105
Oakley, CA 94561

925-625-2279

925-625-2279

925-625-0169



Hours
Monday - Friday
8 a.m. to Noon
1 p.m. to 5 p.m.

Emergency Situation
If you think there is a problem with ISD's pipeline or facilities, or see flooding coming from a manhole, please call our 24-hour emergency number at (925) 625-2279. After regular business hours your call will be transferred directly to one of our maintenance personnel.

Staff
Name Title Email Phone
Davisson, Chad General Manager (925) 809-3001
Gehlke, Roni Outreach/Recycled Water Consultant (925) 809-3006
Goff, Cecilia District Secretary/Office Administrator (925) 809-3002
Gonzales, Robert Consulting Engineer (925) 553-3142
Howard, Charley Human Resources (925) 809-3015
Housen, Vivian District Engineer (925) 518-3487
Paz, Susan Administrative Technician (925) 809-3014
Welty, Michael Financial Manager (925) 809-3004
Whyte, Elayna Permit/Planning/Accounting Technician (925) 809-3003
Zimmerman, Tyson Assistant General Manager (925) 809-3011