King County Water District 125
Payment Options

In Person
Water District 125 is located at:
3460 S 148th ST Suite 110
Tukwila, WA 98168
(206) 242-9547
We are located on S 148th St between Military Rd S and
Tukwila International Blvd.
The District Accepts Cash and Check Payments only

Over the Phone
You can also pay your bill by phone through
AFTS at (206) 521-5130
or toll free at (877) 259-8702.

AFTS will charge $1.00 per ACH transaction for E-check and
Credit Card Payments. There will be an additional 2.25% fee if
you choose to pay with a credit or debit card.

Pay Online
King County Water District 125
3460 S 148th ST Suite 110
Tukwila, WA 98168

(206) 242-9547   
Office Phone
(206) 248-1744   Fax
Have a leak?

If you think you might have a leak there is an easy way to check.
Please see the video below provided by Professor H20 and Highline
Water District.
If the video fails to load please click here.

You may qualify for a leak adjustment - contact the office for
details. You must document the repair with receipts or photos.
Have a toilet leak?

If you think you might have a leak in your toilet here is how you can check.

1.  Remove the upper tank lid.
2.  Put 5-10 drops of food coloring in the tank. Put lid back on but don't flush.
3.  After about 10 minutes, look in the bowl. If you see color, you have a leak.
The main causes of a leak are either a "fill valve" that will not shut off or a bad "flapper".

Fill valve problem:
A fill valve problem will cause water to flow over the "overflow tube", either because the water level is set
too high or it won't shut the water off. If you can't adjust the water level lower or can't get the fill valve to
shut off, replace the fill valve. Pedestal fill valves are considered more reliable than the ball and float type.

Bad flapper:
If you had water run into the bowl during the dye test and the water level is not set too high, your flapper is
probably leaking and it should be replaced. If your old flapper has a float on the chain, make sure your new
one does too (or put the old float on the new chain).
When replacing a toilet flapper, remember that it is very important to replace it with the proper flapper
model for your toilet. Using a standard flapper in many 1.6 gallon toilets can make the toilet flush up to 3.5
gallons per flush (except FlushStar models).
Now Through March 31, 2016: $75 - $200 Rebates for
New Premium WaterSense Toilets

Toilets are a household’s biggest water user — old models can use three to five gallons of water per flush,
costing you money on your utility bill. Consider replacing it with our help! For a limited time, customers who
replace their old, water guzzling toilet with a new WaterSense-labeled model are eligible for a $100 rebate.
Multifamily customer that choose one of the newer 1.06 gallon per flush Premium WaterSense models and
get a $75 - $200 rebate! Learn more at  or by calling (206) 684-SAVE (7283).
Water Quality Reports

Water District 125 is dedicated to bringing you the safest potable water you can get. Each year the District
provides all district customers with a Water Quality Report. This report describes Department of Health and
EPA's regulations and shows test results from Water District 125 from a variety of tests performed on your

2016 Water Quality Report (CCR)
                     Leak Detection

Visit these links to get help in finding a leak. Leak
information is translated into
English, Spanish,
Chinese and Somali.

      Companies that Provide Leak Detection

  • Akers Landscaping                         206-439-9251

  • American Leak Detection                206-747-7118

  • Jim Guess Construction                  360-825-7725

  • Underground Detection                206-282-1866