Overview
HAVANA STP serves approximately 3,300 residents in Havana, Illinois. The plant discharges treated wastewater into the Illinois River watershed, ultimately draining to the Mississippi River.
HAVANA STP is a municipal wastewater treatment plant located in Havana, Illinois, serving a population of about 3,301. The facility is situated in Mason County, near the Illinois River, and operates under the regulatory framework of the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges to surface waters. As a small agglomeration serving fewer than 10,000 people, the plant is subject to secondary treatment standards under federal regulations. Plants of this scale in Illinois typically employ biological treatment followed by disinfection to meet permit limits for biochemical oxygen demand, total suspended solids, and ammonia. The plant's treated effluent is discharged to a receiving water body that flows into the Illinois River, a major tributary of the Mississippi River. This river system supports diverse aquatic life and is an important migratory corridor for fish and waterfowl. The plant's operations contribute to protecting downstream water quality in the Mississippi River basin.
Environmental context
The plant discharges into a water body that drains to the Illinois River, which flows southwest to join the Mississippi River near Grafton, Illinois. The Illinois River watershed supports a variety of fish species, including catfish, bass, and crappie, and provides habitat for migratory birds along the Mississippi Flyway. Maintaining proper treatment levels is essential to prevent nutrient enrichment and protect aquatic ecosystems in this ecologically sensitive river system.
Frequently asked questions
HAVANA STP is located at 1002 12th Street in Havana, Illinois, within Mason County.
The plant serves approximately 3,301 residents in the city of Havana and surrounding areas.
The plant discharges treated effluent to a receiving water body that flows into the Illinois River, which eventually joins the Mississippi River.
As a U.S. facility, HAVANA STP operates under the Clean Water Act and must comply with an NPDES permit issued by the Illinois Environmental Protection Agency, which sets limits on pollutants in the discharge.
Plants of this size typically use secondary biological treatment, such as activated sludge or lagoon systems, followed by disinfection, to meet federal and state water quality standards.
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