To address recommendations from the North Arm Investigation Committee, the HLWID applied for and received funding from the EPA. This grant will be applied to reduce the occurrence of cyanobacteria in the North Arm. As part of the grant project, the University of Idaho will conduct a two-year study (Summer 2025 and 2026), the Lake Manager will conduct water sampling in the bay and along Hayden Creek, and a contracted Environmental Engineer will use the data from these studies to accomplish the objectives of the DW Grant Project.
Grant Application
To address the alarming frequency of HABs occurring along the North Arm of Hayden Lake, the HLWID applied for and received funding from the EPA in the form of an Emerging Contaminants Grant. This grant is focused on reducing or eliminating the occurrence of cyanobacteria and cyanotoxins in the North Arm.
Hayden Creek and North End Water Monitoring
Hayden Creek is the main source of inflow for the North Arm from outside Hayden Lake. The NAIC suspects that nutrients from the creek are contributing to the harmful algae blooms. Hayden Creek Monitoring will assess the creek’s annual nutrient contribution to the lake. North End Water Quality Monitoring will assess the annual nutrient load of the lake on the north end. All three studies will help to paint a picture of how nutrients are cycled into and through the North Arm. This understanding will aid in decision-making regarding remediation activities at the north end of Hayden Lake. If you are interested in learning more about the research, you can access the monitoring plan, current monitoring data, and analyses from the study by downloading them below.
Partnerships
University of Idaho Research
As a part of the grant project, the University of Idaho will conduct a two-year study (Summer 2025 and 2026) of the sediment-born and macrophyte sources of nutrients in the North Arm of Hayden Lake. Water sampling in the bay and along Hayden Creek will explore runoff as a source of nutrients and will be the work of the Lake Manager. The data from these studies will be used by a contracted Professional Engineer to identify the actions to be taken to remedy the excess nutrients and accomplish the objectives of the Drinking Water Grant Project.
