Meridian Heights Water and Sewer Association | Secondary Wastewater Treatment in Meridian, Idaho

Meridian Heights Water and Sewer Association is a municipal wastewater treatment facility located in Meridian, Ada County, Idaho. The plant serves a small population of 732 residents, providing secondary treatment to meet state and federal water quality standards. As a facility in the United States, it operates under the Clean Water Act, with discharge permits regulated by the Idaho Department of Environmental Quality. The plant has a designed capacity of 238.48 volume units and a current discharge volume of 177.91, indicating it operates below its maximum capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring effluent meets regulatory limits before release. The treated effluent from the plant enters the local watershed, which ultimately drains into the Boise River. The Boise River flows through southwestern Idaho and joins the Snake River, a major tributary of the Columbia River. This system supports diverse aquatic life and provides water for irrigation, recreation, and municipal use downstream.

The plant discharges into the Boise River basin, which flows into the Snake River and then the Columbia River, reaching the Pacific Ocean. The watershed supports critical habitat for salmon and steelhead trout, species that rely on clean water for migration and spawning. Protecting water quality in this system is essential for maintaining regional biodiversity and ecosystem health.