King County Water District #90
15606 SE 128th Street
Renton, WA 98059
425-255-9600 Office
425-277-4128 Fax
Contact via E-mail

Frequently Asked Questions

How can I pay my water bill?

Acceptable forms of payment are:

  • Check, Money Order, or Cash in the office. 
  • KCWD90 Automatic Payment method a FREE service provided by the District. To download the form, go to the Forms Tab.
  • InvoiceCloud (Third Party) Payment Portal. You are able to pay online or over the phone. A $2.95 convenience fee for online payment and $3.45 for pay by phone is added to your bill. You will need your seven digit account number and last name.
  • US Mail directly to our office.
  • Automatic deducted from your checking account.
  • Drop-Box is located at the SE corner of the the District parking lot.

When is my bill due?

Water bills are due on the 15th of the month (or the Monday following the 15th if it falls on a Saturday or Sunday). Late charges are applied on the first business day of the following month. Late fees are 10% of your most current water bill.

What should I expect for an average bill?

There is a bi-monthly base charge for our residential customers of $59.75, as of January 1, 2020. The base charge includes the first 5 hundred cubic feet of water. (One hundred cubic feet of water equals 748 gallons) Additional water usage will be billed according to actual consumption per one hundred cubic feet, based on the following schedule: 0 - 5 ccf's included in base rate; 6 - 15 ccf's $3.55 per ccf; 16 - 25 ccf's $4.00 per ccf; 26 + ccf's $4.80 per ccf.  In June, July, August, and September of each year there is also a summer surcharge applied to all ccf's after the first five. As of January 1, 2020, the summary surcharge is $0.90 per ccf. 

How do I pay my water bill if your office is closed?

For your convenience, the District has a drop-box located at the South East corner of the property. You should be able to pull up to the last stall in our customer parking lot, drop off the payment on the drivers side, and pull back out. All payments dropped off in the box will be posted to your account the following morning. Please, no cash in the drop box.

What if it is determined that I overpaid my account after I moved?

If you overpaid your water bill account, refunds are processed on approximately the 20th of each month. In the event that you are entitled to a refund, it is important that we have the correct forwarding information available.

When will I receive my water bill?

The District bills customers on a bi-monthly basis. Your bill should arrive during the first week of the month on either odd or even months. If you do not receive your bill please notify the District office. Payments are due on the 15th of the month; failure to receive your bill is not an excuse for non-payment.

Why is there a balance on my account - I just moved in?

Many new homeowners are not aware that (unlike other utilities), water charges are associated with the physical property rather than with the individual incurring the charges. What this means, is that property ownership is transferred along with any unpaid balance to the new owner. When the District is notified of a change in ownership, a final bill is prepared. However, if the previous owner and/or tenant does not pay the final bill, the responsibility lies with the new owner.

Why is there a street light charge on my bill?

The purpose of this lighting is generally to enhance the night-time visibility of neighborhood streets and intersections. If street lights have been installed in your area, a street light charge may also be included on your bill or, if applicable, via your Homeowner’s Association. The District is billed by Puget Sound Energy (PSE) and those charges are distributed evenly to all of our affected water service customers. The District does not maintain street lights. If you have an outage call PSE at 1-888-225-5773. Be prepared to provide the numbers on the light pole.

Why are PSE Street Light charges on water bills?

This is what we refer to as an old “legacy” system. This practice went into effect in the “50’s” when not every home was a customer of PSE. At the time, the most effective method to collect all of the funds was through the water District’s, which had connections to nearly everyone.

Top of Page