Hours & Directions

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In response to county, state, and federal guidelines, Central San’s public-facing services are closed until further notice. This includes: 

All in-person school programs, public events, and tours have also been suspended.  

Wastewater collection and cleaning services continue uninterrupted. We remain committed to our mission of protecting public health and the environment.

Information on modified operations and services will be posted on this page and updated as the situation changes.

Central San Offices and
Treatment Plant

Household Hazardous Waste
Collection Facility

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

Hours of Operation

Emergencies & Treatment Plant: 24 hours
Headquarters: Monday-Friday, 8:00am-5pm
Permit Counter: Monday-Friday, 8am-5pm
Inspection: Monday-Friday, 7am-3pm

Operations are closed on the following holidays:

  • 01/01/20 New Year’s Day Holiday
  • 01/20/20 Martin Luther King, Jr. Day
  • 02/12/20 Lincoln’s Birthday
  • 02/17/20 Washington’s Birthday
  • 05/25/20 Memorial Day
  • 07/03/20 Independence Day Observed
  • 09/07/20 Labor Day
  • 11/11/20 Veterans’ Day
  • 11/26/20 Thanksgiving
  • 11/27/20 District Holiday
  • 12/24/20 Christmas Eve 
  • 12/25/20 Christmas Holiday 
  • 12/31/20 New Year’s Eve

4797 Imhoff Place
Martinez, CA 94553
(800) 646-1431
View directions

Hours of Operation

By appointment only 

Residents: Monday-Saturday, 7am-2pm, by appt only
Reuse Room: Closed until further notice
Small Businesses: Monday-Saturday, by appt only

HHW Facility is closed on the following holidays:

  • 01/02/20 New Year’s Day
  • 01/20/20 Martin Luther King, Jr. Day
  • 02/12/20 Lincoln’s Birthday
  • 02/17/20 Washington’s Birthday
  • 05/25/20 Memorial Day
  • 07/04/20 Independence Day
  • 09/07/20 Labor Day
  • 11/11/20 Veterans’ Day
  • 11/26/20 Thanksgiving
  • 11/27/20 District Holiday
  • 12/24/20 - 01/03/21 Holidays