Overview
Crystal Lake STP 1&2 serves approximately 78,000 residents in Crystal Lake, Illinois. The plant operates under the U. S. Clean Water Act, which mandates secondary treatment for municipal wastewater.
Crystal Lake STP 1&2 is a municipal wastewater treatment plant located in Crystal Lake, Illinois, serving a population of about 78,261. The plant is part of the wastewater infrastructure for McHenry County and discharges treated effluent into local waterways. As a U. S. facility serving a medium-to-large agglomeration, the plant is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting. Plants of this scale typically employ secondary treatment with disinfection to meet effluent limits. The plant's treated effluent ultimately drains into the Fox River watershed, which flows into the Illinois River and then the Mississippi River. This system supports diverse aquatic life and provides water for downstream communities and ecosystems.
Environmental context
The plant discharges into the Fox River watershed, which flows into the Illinois River and eventually the Mississippi River. This river system supports a variety of fish and wildlife, including migratory birds. The watershed is ecologically sensitive due to its role in regional water quality and biodiversity.
Frequently asked questions
Crystal Lake STP 1&2 is located at 1128 Coventry Lane, Crystal Lake, Illinois, United States.
The plant serves approximately 78,261 residents in Crystal Lake and surrounding areas.
The plant discharges treated effluent into the Fox River watershed, which flows into the Illinois River and then the Mississippi River.
The plant operates under the U. S. Clean Water Act and is regulated through an NPDES permit issued by the Illinois Environmental Protection Agency.
Plants of this scale typically employ secondary treatment with disinfection, meeting EPA effluent guidelines for BOD, TSS, and pathogens.
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