Linden WWTP - Secondary Wastewater Treatment in Guthrie County, Iowa

Linden WWTP is a municipal wastewater treatment plant located in Cass Township, Guthrie County, Iowa, United States. The facility serves a small population of 226 residents, reflecting its role in a rural community. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant operates under the regulatory framework of the US Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. For small communities like this, secondary treatment is the standard requirement, ensuring compliance with federal water quality standards. The designed capacity of 75.71 units matches the current discharge volume, indicating the plant operates at full capacity. The treated effluent is discharged into a local water body within the Mississippi River Basin, which ultimately drains to the Gulf of Mexico. The plant's location in inland Iowa means its discharge contributes to the health of regional streams and rivers, supporting aquatic ecosystems and downstream water quality. Proper treatment helps protect the broader watershed from nutrient pollution and other contaminants.

The plant discharges into a local water body within the Mississippi River Basin, which flows south to the Gulf of Mexico. This watershed supports diverse aquatic life and is an important migratory corridor for birds and fish. The secondary treatment process reduces organic pollutants and suspended solids, helping to maintain water quality in the receiving stream and downstream environments.