Central San Offices and Treatment Plant

5019 Imhoff Place
Martinez, CA 94553
(925) 228-9500
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Hours of Operation

Emergencies & Treatment Plant: 24 hours
Headquarters: Monday-Friday, 8:00am-5pm
Permit Counter: Monday-Friday, 8am-5pm

Operations are closed on the following holidays:

• 01/01/19  New Year’s Day Holiday
• 01/21/19  Martin Luther King, Jr. Day
• 02/12/19  Lincoln’s Birthday Observed
• 02/18/19  Washington’s Birthday
• 05/27/19 Memorial Day
• 07/04/19  Independence Day
• 09/02/19  Labor Day
• 11/11/19 Veterans’ Day Observed
• 11/28/19  Thanksgiving
• 11/29/19  District Holiday
• 12/24/19  Christmas Eve 
• 12/25/19  Christmas Holiday 
• 12/31/19 New Year’s Eve

Household Hazardous Waste Collection Facility

4797 Imhoff Place
Martinez, CA 94553
(800) 646-1431
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Hours of Operation

Residents: Monday-Saturday, 9am-4pm
Reuse Room: Monday-Saturday, 9am-3:30pm
Small Businesses: Monday-Saturday, by appt only

HHW Facility is closed on the following holidays:

• 01/02/19  New Year’s Day
• 01/21/19  Martin Luther King, Jr. Day
• 02/12/19  Lincoln’s Birthday Observed
• 02/18/19  Washington’s Birthday
• 05/27/19  Memorial Day
• 07/04/19  Independence Day
• 09/02/19  Labor Day
• 11/11/19  Veterans’ Day
• 11/28/19  Thanksgiving
• 11/29/19  District Holiday
• 12/24/19 - 01/01/20 Holidays