Water Quality Improvement Projects
|Little Spokane River||Dragoon Creek||Deadman Creek||Unnamed Creek|
|Temperature, fecal coliform, pH, & PCBs*
Turbidity and Dissolved oxygen
|Dissolved oxygen and fecal coliform bacteria||Temperature and pH
*The PCB listing is being addressed as part of the PCB water quality improvement project on the Spokane River.
When a water body does not meet state standards, it is placed on the federal Clean Water Act’s Section 303(d) list of impaired water bodies.
To address the water quality problems in the Washington portion of the watershed, Ecology and the Spokane County Conservation District worked together on a water quality improvement project called a Total Maximum Daily Load (TMDL). A TMDL is a common sense, science-based approach to cleaning up polluted water so that it meets water quality standards.
Ecology developed a TMDL to address low oxygen and high nutrients in the Spokane River and Lake Spokane (Long Lake). The Little Spokane’s contribution of nutrients and sediment to the Spokane River is important to this process and was taken into consideration during the development of a TMDL for the watershed.
Ecology, working with a local advisory group, developed a TMDL for the Little Spokane River Watershed. This TMDL focused on fecal coliform bacteria, temperature, and turbidity issues in the watershed. After a public comment period and responding to comments received, Ecology submitted the final TMDL to EPA for approval in February 2012. EPA approved the TMDL in April 2012.
Ecology is currently working on an additional TMDL to address the dissolved oxygen and pH impairments on the Little Spokane River. This TMDL will likely require reductions in the amount of nutrients reaching the river.
Little Spokane River
Fecal coliform bacteria
# of TMDLs (for fecal coliform bacteria, temperature, and turbidity): 36
Fecal coliform bacteria, temperature, and turbidity - TMDL approved
Dissolved oxygen, pH - Under development
PCB - being addressed through the PCB water quality improvement project
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