Overview
MERIDIAN STP serves approximately 75,000 residents in Meridian, Idaho, as part of the city's municipal wastewater infrastructure. The plant discharges treated effluent into the Boise River watershed, which flows to the Snake River and ultimately the
MERIDIAN STP is a municipal wastewater treatment plant located in Meridian, Idaho, serving a population of around 75,000. The plant is situated in Ada County, part of the rapidly growing Treasure Valley region, and operates under the regulatory framework of the U. S. Clean Water Act. As a facility serving a medium-sized agglomeration, MERIDIAN STP is expected to meet secondary treatment standards under the National Pollutant Discharge Elimination System (NPDES) permit program. The plant's treatment processes are designed to reduce organic matter and suspended solids before discharge, consistent with typical activated sludge or similar biological treatment systems common in the region. The treated effluent from MERIDIAN STP is discharged into the Boise River, a tributary of the Snake River, which flows into the Columbia River and eventually reaches the Pacific Ocean. The Boise River supports diverse aquatic life and provides irrigation and recreational water for the region. The plant's operations are critical for protecting water quality in this semi-arid watershed, where summer flows are heavily dependent on upstream reservoir releases.
Environmental context
MERIDIAN STP discharges into the Boise River, which flows into the Snake River and then the Columbia River, ultimately reaching the Pacific Ocean. The Boise River watershed supports diverse aquatic species, including trout and salmon, and is an important migratory corridor for fish. The region's semi-arid climate means river flows are regulated by dams, making the plant's effluent a significant component of base flow during dry periods.
Frequently asked questions
MERIDIAN STP is located on North Ten Mile Road in Meridian, Ada County, Idaho, United States.
MERIDIAN STP serves approximately 75,092 residents in the city of Meridian and surrounding areas.
The treated effluent from MERIDIAN STP is discharged into the Boise River, which flows into the Snake River and then the Columbia River, eventually reaching the Pacific Ocean.
MERIDIAN STP operates under the U. S. Clean Water Act, with discharge regulated by an NPDES permit issued by the Idaho Department of Environmental Quality or the EPA.
Plants serving around 75,000 people in the U. S. typically provide secondary treatment, which includes biological processes to remove organic matter and suspended solids, meeting NPDES permit limits.
Nearby plants