Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Cadmium, Lead, and Zinc in the Spokane River Recommendations for TMDL and Waste Load Allocations

Publication number Date Published
98-329September 1998
VIEW NOW Cadmium, Lead, and Zinc in the Spokane River Recommendations for TMDL and Waste Load Allocations (Number of pages: 107) (Publication Size: 2MB)

Trouble viewing? Try these free options.
Author(s) Pelletier, G. and K. Merrill
Description The Spokane River regularly violates water quality standards for zinc. Standards for lead and cadmium are also exceeded frequently, especially at higher flows. A procedure for determining Waste Load Allocations (WLAs) for all NPDES point source discharges to the Spokane River was developed based on meeting aquatic life criteria in the effluent. Permit limits for NPDES dischargers will be developed in the future for each individual discharger under Ecology’s current schedule for permit cycles. Effluent limits for cadmium, lead, and zinc will be determined by comparing existing concentrations of metals in effluent, where adequate data exist, with the water quality criteria associated with the effluent hardness. Whichever results in the lower permit limits will be chosen.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact Joan LeTourneau at 360-407-6764 or
Keywords recommendations, stream, receiving water, metals, methods, environmental, flow, permit, Spokane River, river, water, water quality, standards, quality, waste, zinc, TMDL, Total Maximum Daily Load, point source, pollution, pollution control, NPDES, lead, effluent, cadmium
WATERSHED Water Resource Inventory Areas
(WRIA 54,WRIA 57)

Spokane River Dissolved Metals Total Maximum Daily Load -- Submittal Report