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For questions about the Wastewater Treatment Division Web site, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

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Staff Contacts

Puget Sound shoreline next to the West Point Treatment Plant, Seattle

Investing in clean water - where does your money go?

Family on Beach

Fish Ladder

Wastewater infrastructure is crucial for protecting water quality and economic vitality, and supporting jobs and growth while maintaining our region’s natural assets like beaches, lakes and rivers.

King County's wastewater utility is entirely funded by the ratepayers who invest in our programs and services through their monthly rate and capacity charge bills. We take seriously our obligation to provide the highest levels of service and accountability to our ratepayers.

Standard & Poor's and Moody’s Investor Services are leading global financial firms that rate corporate stocks and municipal bonds according to risk profiles. In 2008 the firms upgraded the ratings to the Wastewater Treatment Division’s bonds, citing:

  • Strong management practices
  • Continued positive financial performance
  • Solid rate base and large service area
  • Commitment to a capital improvement plan

The Moody's rating for these sewer revenue bonds, as well as similar bonds issued in the past, went from A1 to Aa3 while S&P raised their rating from AA to AA+. Both rating agencies also upgraded their underlying rating for the utility’s variable rate bonds by one notch to A2 (Moody’s) and AA- (S&P).

The favorable credit ratings will lower the cost of borrowing by reducing the amount of debt service, which, in turn, reduces impacts to the rate

Revenues

2009_OperRevPie

King County’s adopted wastewater budget for 2009 includes about $270.4 million in revenue from the sewer rate and about $34.8 million in revenue from the capacity charge. The 2009 budget also includes about $14.1 million from investments and about $2.0 million from other income such as fees for industrial waste and sewage removed from septic tanks.

King County also borrows bonds to fund the cost of construction projects under its capital improvement program.

Expenditures

2009_OperRevUsePie

Of the total revenue (about $321 million), the Wastewater Treatment Division is budgeted to spend about $104.2 million to operate and maintain its facilities and about $217.5 million for planning, designing and building facilities.

In 2009, the $321 million in operating revenue is allocated as follows:

Treatment $180.4 million 56.2%
Conveyance $74.2 million 23.1%
Combined Sewer Overflow (CSO) Control $25.4 million 7.9%
Biosolids $11.0 million 3.4%
Other $30.2 million 9.4%

The county's wholesale monthly sewer rate is $31.90. (This rate is for 2009-2010.) The monthly capacity charge for new connections is $47.64. Effective Jan. 1, 2010, the capacity charge will increase from $47.64 to $49.07 (view June 16, 2009 news release).

News releases

Related information

How the WTD Capital Improvement Program (CIP) is funded

The WTD CIP is funded primarily through proceeds from revenue bond sales, short-term borrowing, capacity charge revenues, and transfers from the operating fund.

The operating fund derives the majority of its revenue from monthly charges to sewer customers that are collected by WTD's component agencies.

Transfers from the operating fund to the capital program are the result of the financial policy requirement of maintaining a debt service coverage ratio greater than one (a minimum of no less than 1.15 of all debt service payments). This means the monthly sewer rate is set such that operating revenues will exceed debt service and operating expenses by an amount equal to at least 15 percent of the total debt service expense. This buffer reduces risk to bond holders and at the end of the year provides WTD with funds to reduce the amount of borrowing necessary to finance the capital program.