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Streams in the Hangman Creek watershed currently do not meet Washington state’s water quality standards for several reasons (see table below for specific impairments). Water quality standards are designed to protect the beneficial uses of our streams and lakes. Beneficial uses can include irrigation, fishing, habitat, recreation (swimming, wading, and boating) and other uses. When a water body does not meet state standards, it is placed on the federal Clean Water Act’s 303(d) list of impaired water bodies. Information about the 303(d) list can be found on our Water Quality Assessments page.
Hangman Creek is also a majority tributary to the Spokane River. Ecology is currently developing a plan to address low oxygen and high nutrients (phosphorus) in the Spokane River and Lake Spokane (Long Lake). Hangman Creek's contribution of nutrients and sediment to the Spokane River is important to this process. Efforts to reduce nutrients, especially phosphorus, in the Hangman Creek watershed will be necessary to address water quality issues in the Spokane River and Lake Spokane.
| Stream | Impairments (303[d] listings) |
| Hangman |
Fecal Coliform
Bacteria (9) |
| Little Hangman Creek |
Fecal Coliform Bacteria Turbidity |
| Rock Creek |
Fecal Coliform
Bacteria (3) Temperature Turbidity Dissolved Oxygen |
| Cove Creek |
Fecal Coliform Bacteria Dissolved Oxygen |
| California Creek |
Fecal Coliform Bacteria Temperature |
| Rattler Run Creek |
Fecal Coliform Bacteria Temperature Turbidity |
| Marshall Creek | Temperature |
| Spangle Creek | pH |
| Unnamed tributary | Fecal Coliform Bacteria |
Note: The number in parentheses indicates the number of segments listed for that parameter.
To learn more about the importance of these various impairments, please click the links below:
Contact us for more information
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