Publication Summary

The Department of Ecology published a report in 1993 with proposed Total Maximum Daily Loads (TMDLs) for ammonia for critical points in the South Fork Palouse River. Ecology adopted an EPA modification of criteria for freshwater chronic un-ionized ammonia after the publication of the 1993 report. This addendum report supplements and supersedes information in the 1993 TMDL Report. This addendum includes revised waste load allocations for effluent discharged by the city of Pullman POTW and revised criteria for Paradise Creek at the state line.

The Department of Ecology published a report in 1993 with proposed Total Maximum Daily Loads (TMDLs) for ammonia for critical points in the South Fork Palouse River. The Department of Ecology adopted an EPA modification of criteria for freshwater chronic un-ionized ammonia after the publication of the 1993 report. This addendum report supplements and supersedes information in the 1993 TMDL Report. This addendum includes revised waste load allocations for effluent discharged by the city of Pullman POTW and revised criteria for Paradise Creek at the state line.

The ammonia limits recommended in this report for Pullman POTW are approximately 20 percent higher than the limits recommended in the 1993 TMDL report. The recommended limits for Albion POTW are the same as in the 1993 TMDL Report because limits for Albion are controlled by the acute criteria, which did not change. The changes in recommended ammonia limits for Pullman POTW are due to the revised criteria for chronic un-ionized ammonia.

Link to EIM data for User Study ID GPEL0003