Marble Hill WWTF - Secondary Wastewater Treatment Plant in Marble Hill, Missouri

Marble Hill WWTF is a municipal wastewater treatment facility located in Marble Hill, Bollinger County, Missouri. The plant serves a population of approximately 1,477 residents, providing secondary treatment to meet state and federal water quality standards. As a small community facility, it plays a vital role in protecting local water resources. The plant operates under the regulatory framework of the US Clean Water Act, administered by the Missouri Department of Natural Resources. Secondary treatment is the standard for municipal plants of this scale, ensuring removal of organic matter and suspended solids. The facility has a designed capacity of 969.06 megaliters per year and currently treats 647.31 megaliters annually, indicating operational headroom. The treated effluent is discharged into a local waterway that drains into the Mississippi River basin. The plant's location in southeastern Missouri places it within the larger Mississippi River watershed, which ultimately flows into the Gulf of Mexico. Proper treatment helps maintain water quality in downstream ecosystems and supports regional aquatic health.

The plant discharges into a tributary of the Mississippi River, which flows southward to the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and is a critical migratory corridor for fish and birds. The plant's secondary treatment helps reduce nutrient loading and organic pollution, protecting downstream water quality in this ecologically significant watershed.