Central San Offices & Permits

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

Emergencies & Treatment Plant: 24 hours
Headquarters: Monday-Friday, 8am-5pm
Permit Counter: Monday-Friday, 8am-4pm
Inspection: Monday-Friday, 7am-3pm

Operations are closed on the following holidays:

• 01/16/23 Martin Luther King, Jr. Day
• 02/13/23 Lincoln’s Birthday Observed
• 02/20/23 Washington’s Birthday
• 05/29/23 Memorial Day
• 07/04/23 Independence Day
• 09/04/23 Labor Day
• 11/10/23 Veterans’ Day Observed
• 11/23/23 Thanksgiving
• 11/24/23 District Holiday
• 12/25/23 Christmas Day
• 12/26/22 Christmas Eve Observed
• 01/01/24 New Year’s Day
• 01/02/24 New Year’s Eve Observed

Household Hazardous Waste Collection Facility

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

Residents: Monday-Saturday, 7am-2pm
Reuse Room: Monday-Saturday, 7am-1:30pm
Small Businesses: Monday-Saturday, by appt only

HHW Facility is closed on the following holidays:

• 01/16/23 Martin Luther King, Jr. Day
• 02/13/23 Lincoln’s Birthday Observed
• 02/20/23 Washington’s Birthday
• 05/29/23 Memorial Day
• 07/04/22 Independence Day
• 09/04/23 Labor Day
• 11/11/23 Veterans’ Day
• 11/23/23 Thanksgiving
• 11/24/23 District Holiday
• 12/24/23 – 01/02/24 Holidays

Central San Treatment Plant (Shipping & Receiving, Contractors Entrance)

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

Emergencies & Treatment Plant: 24 hours

Access from Treatment Plant gate on Imhoff Drive between Imhoff Place and Solano Way (see red icon on map).

RV Wastewater Disposal Station

5019 Imhoff Place
Martinez, CA 94553
(925) 228-9500
View directions

Located on Imhoff Drive between Imhoff Place and Solano Way, next to the Treatment Plant entrance (yellow icon on map).

Hours of Operation

Sunday-Saturday, 7am-7pm