By Kevin McNeill, DEQ Loan Program

Upgrades to the City of Weiser wastewater treatment plant will save the city almost 665,000 kilowatt-hours and $45,000 per year. The upgrades were made possible with a low-interest loan from the Idaho Department of Environmental Quality State Revolving Fund (SRF).


The savings come from installing energy-efficient “green” options the city chose to fund when upgrading its wastewater treatment facility in lieu of the more energy-intensive alternatives available. Substantial cost savings from reduced energy bills will rapidly offset the initial cost difference of the green components. Weiser can expect many subsequent years of continued cost savings due to the energy-efficient treatment of the city’s wastewater.

Investigation required by the SRF’s Green Project Reserve Program revealed opportunities to upgrade Weiser’s wastewater system that would provide additional energy and money savings. The city’s consultants recommended installing fine bubble diffusers with automated dissolved oxygen control and premium energy-efficient blowers and pumps equipped with variable frequency drives to ensure the equipment operated at optimum speeds, saving energy and reducing mechanical stress.

To learn more about grants and loans available to wastewater and drinking water systems, visit our Grants and Loans webpage.