Croghan V STP - Secondary Wastewater Treatment in Village of Croghan, New York

Croghan V STP is a municipal wastewater treatment plant located in the Village of Croghan, Lewis County, New York. The plant serves a small community of approximately 665 residents, providing essential sanitation services to this rural area in the northern part of the state. The plant operates with secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater facilities. Under the National Pollutant Discharge Elimination System (NPDES), plants of this scale must meet effluent limits to protect water quality. The plant has a designed capacity of 264.98 thousand cubic meters per year and discharges an average volume of 348.26 thousand cubic meters annually. The treated effluent is discharged into local waterways that ultimately drain into the Black River basin and then into Lake Ontario. This makes the plant's performance important for the health of the Great Lakes ecosystem. Proper treatment helps prevent nutrient pollution and protects aquatic habitats in the region.

The plant discharges into tributaries of the Black River, which flows northward into Lake Ontario, part of the Great Lakes system. The Black River watershed supports diverse aquatic life and is an important recreational and ecological resource. The plant's secondary treatment helps reduce organic pollutants and suspended solids, protecting downstream water quality in this sensitive freshwater ecosystem.