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Page Wastewater Treatment Plant Tertiary Treatment System  

Project Sponsor 

South Fork Coeur d’Alene River Sewer District  


The purpose of this project is to install a tertiary treatment system at the Page Wastewater Treatment Plant. The facility currently treats most of the wastewater in the Silver Valley from Kingston to Wallace (excluding Smelterville), serving a population of 7,055.  


This project was awarded $17 million from Governor Little’s Leading Idaho initiative. 


The South Fork Sewer District evaluated potential treatment technologies to determine the most consistent phosphorus removal method and selected solids contact clarification. Bench scale testing was performed to confirm that the proposed technology will provide the desired level of phosphorus removal, and DEQ approved the preliminary engineering report on January 30, 2024. 

The district will conduct a proof pilot study during spring runoff to verify performance under cold water conditions. Work will also begin on an early geotechnical package to keep the project on schedule. 


This project is expected to reduce current phosphorus loading to the South Fork Coeur d’Alene River by 7,015 pounds annually.  

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