Sewer Rates
Sewer Rates (effective June 1, 2021)
Utility account holders receive both a Black Diamond Sewer charge, and a King County Sewer charge.
| Monthly Sewer Charge: | |
|---|---|
| King County Metro | $47.37 |
| Black Diamond Sewer | $25.00 |
| Total | $72.37 |
Multi-family residential accounts are charged an additional Black Diamond Sewer charge and King County Metro Sewer charge for each additional unit served by a single meter.
Commercial users are charged an additional $11.50 Black Diamond Sewer charge for each additional units served by a single meter, as well as a King County Metro sewer usage charge of $7.87 per one hundred cubic feet of water usage above 750 cubic feet.