Utility Billing

COBI Water & Sanitary Sewer & Storm and Surface Water Utilities

Finance & Administrative Services oversees utility billing, and Public Works oversees utility operations and maintenance.

There are over 100 independent water systems on Bainbridge Island. Your property may be serviced by the City or by a community well or larger system. (See service area maps below.)

COBI Water Utility Service Area and Billing Dates
To start or stop water utility service complete a Utility Service Change Form:
- Utility Service Change Form (Online Submission)
- Utility Service Change Form (Downloadable, Fillable PDF)
Storm and Surface Water Utility Information Webpage

COBI Utility Rates (per month)*:

Note: Your utility billing ALWAYS reflects two (2) months of service.

Bainbridge Island Downtown		January 01, 2025	January 01,2026
Water Base Rate - Single Family		$24.80	$31.25

	Plus charge per volume:
	Water Volume: 100cf - 500cf	$2.52 per 100	$3.18 per 100
	Water Volume: 501cf - 1,200cf	$4.04 per 100	$5.09 per 100
	Water Volume: 1,201cf - 3,000cf	$5.75 per 100	$7.25 per 100
	Water Volume: over 3,000cf Water Base Rate - Multi Family	$7.81 per 100 $10.71 per unit	$9.84 per 100 $13.49 per unit
Sewer Base Rate - Single Family		$52.32	$60.43
Sewer Base Rate - Multi Family		$45.83 per unit	$52.93 per unit
Sewer Volume		$8.93 per 100	$10.31 per 100
2-Month Base Rate Single Family water and sewer		$154.24	$183.36

Sewer District No. 7		-*	$100.90*
With Grinder Pump		$34.59	$39.95
Without Grinder Pump		$28.46	$32.87
Storm and Surface Water management annual fee for single family residential properties		$244.00	$250.00

*This rate is charged by Kitsap County Sewer District No. and is subject to changes by the District.

The national average water use for a family of four is approximately 1000 cubic feet (cf)¹ each month. A home with an irrigation system can use considerably more. Apartment complexes use approximately 500 cf of water per month per unit.

¹100cf = 750 gallons. To place these measurements in perspective:

Average bath = 50 gallons
Average shower = 20 gallons

COBI Utility Billing Dates:

The City of Bainbridge Island bills water and sewer every other month. Each bill represents two (2) months of consumption. Billing is processed the first week of the month and payment is due the last day of the month in which it is billed. The storm and surface water utility fee is billed once a year through Kitsap County on behalf of the City and the fee (noted on the bill as "SSWM fee") is included on each annual property tax statement.

Billing Month	Area Billed	Consumption Dates
January	Area A - Fletcher	Oct 15 - Dec 15
February	Area B - Wing Point	Nov 15 - Jan 15
March	Area A - Fletcher	Dec 15 - Feb 15
April	Area B - Wing Point	Jan 15 - Mar 15
May	Area A - Fletcher	Feb 15 - Apr 15
June	Area B - Wing Point	Mar 15 - May 15
July	Area A - Fletcher	Apr 15 - Jun 15
August	Area B - Wing Point	May 15 - Jul 15
September	Area A - Fletcher	Jun 15 - Aug 15
October	Area B - Wing Point	Jul 15 - Sep 15
November	Area A - Fletcher	Aug 15 - Oct 15
December	Area B - Wing Point	Sep 15 - Nov 15

Winter Sewer Averaging

During the drier parts of the year (late spring, summer, early fall) not all household water consumption is going into the sewer system. The City recognizes water for gardens, landscaping, etc., goes into the ground or the drain at the street. Therefore, your billed sewer consumption during this time period is based on your average winter consumption. (City Ordinance No. 2023-16)

Available Rebates and Discounts

Low-Flow Toilet Rebate - If you are on the City’s sewer system and you replace a toilet that was installed before 1994, you may qualify for up to a $100 rebate. The date your toilet was manufactured is printed under the tank lid. (BIMC Chapter 13.14.110, Ordinance No. 99-23)
- To apply for rebate, submit proof of purchase and installation to Utility Billing. Contact Utility Billing at (206) 780-8603 or finance@bainbridgewa.gov.

Water Quality

If you have concerns or questions regarding the quality of drinking water or about storm and surface water quality, please call COBI Public Works at (206) 842-1212.

See the reports below for 2024 testing: