Wastewater Rates

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Where can I find how much I pay for sewer service?

DSRSD bills single-family dwellings for wastewater service on the owner’s annual property tax bill. The new rate is reflected in county property tax bills. The service charge is listed as DSRSD SEWER SVC on the property tax bill as follows:

Alameda County residents, look under FIXED CHARGES AND/OR SPECIAL ASSESSMENTS.
Contra Costa County residents, look under SPECIAL TAXES AND ASSESSMENTS .

Newly constructed single-family dwellings may be billed bimonthly until the next property tax bill. We bill all other customers bimonthly.

Residential Customers

Single-Family Dwellings

	Rates Effective July 1, 2024
Class	Annual Rate	Equiv. Bimonthly Rate

Single-family home or townhouse	$516.18	$86.03
Duplex	$1,032.36	$172.06
Single-Family w/ 2nd Dwelling Unit	$903.48	$150.58

Multi-Unit Dwellings

	Bimonthly Rates Effective July 1, 2024

Class
Multifamily/Condominium	$64.54 per dwelling unit

Non-Residential Customers

Commercial, industrial, and institutional (CII) customers are charged variable rates based on cost of service and billed bimonthly. The rates have two components: collection through the sanitary sewer system and treatment/disposal at the wastewater treatment facility. The collection rate is based on volume only, while the treatment rate is based on volume and wastewater strength. As a result of the 2023 Local and Regional Sewer Cost of Service Study, the wastewater strength categories have been expanded and restructured for more accurate allocation of actual treatment costs among CII customers.

Wastewater strength is measured by the degree of organic pollutant known as biological oxygen demand and total suspended solids. Rates are higher for customers with a a higher level of organic pollutant because it costs more to treat. Rates are also higher for customers with higher flow and volume.

Please contact Customer Service at 925-828-8524 if you have questions about the strength factor that applies to your business.

Commercial / Institutional / Industrial

Wastewater Strength*	Billing Unit**	Rates Effective July 1, 2024
Less than or equal to 300 mg/L	ccf	$4.77
Between 300 and 450 mg/L	ccf	$5.71
Between 450 and 600 mg/L	ccf	$6.65
Between 600 and 750 mg/L	ccf	$7.59
Between 750 and 900 mg/L	ccf	$8.53
Between 900 and 1,050 mg/L	ccf	$9.46
Greater than 1,050 mg/L	ccf	TBD by District

*Strength is an average of biochemical oxygen demand (BOD) and total suspended solids (TSS), measured in milligrams per liter (mg/L)
**One cubic hundred foot (ccf) equals 748 gallons

Pretreatment Program

In addition to the service charges listed above, customers participating in the District’s Industrial Pretreatment Program pay fees that reflect the DSRSD staff effort involved in permitting, monitoring, and lab analyses. All industrial customers complete an Industrial Waste Discharge Permit Application to determine whether they are required to participate in the program. Contact the Senior Environmental Compliance Inspector at 925-875-2335 regarding industrial wastewater rates, the Pretreatment Program, or the permit.

Rate Changes

The District bases its wastewater rates on the cost of providing service to each class of customer and rates usually increase each year on July 1. The DSRSD Board of Directors may change rates at other times as a result of rate studies or other factors. Customers are notified when rate changes are proposed as required by Proposition 218. Customers are encouraged to attend public hearings regarding rate changes and submit written comments. For more information on your rights to protest rate changes, see:

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