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New York power
Generates renewable electricity from the Deer River, supporting New York communities and producing enough electricity for about 860 homes for a year.*
Air quality & health in Lewis County
Lewis County has a population of 26,548. Across five conditions the American Lung Association tracks — childhood asthma, adult asthma, COPD, lung cancer, and cardiovascular disease — it reports a combined 5,612 cases in the county.
No ozone or particle pollution grades are available for this county in the most recent report. The figures above describe how many residents live with conditions sensitive to air quality — not measured pollution levels.
Long-term exposure to air pollution has been linked to certain health conditions, particularly for children and older adults. Where electricity comes from affects how much combustion pollution is produced on the grid.
These figures describe the county as a whole and are not specific to this facility. Sources: American Lung Association – State of the Air (New York); U.S. EPA Air Quality Index.
The story behind this New York renewable energy facility
New York has 142 hydropower plants in this category, and the Copenhagen Plant on Cataract Street ranks #108 of 142 by 2024 electricity produced. It draws on the Deer River and has run since 1984, using three generators with a combined capacity of 3.3 MW (megawatts, a measure of the most power a plant can deliver at one moment).
In 2024 it produced 8.6 gigawatt-hours (a unit of electricity; a gigawatt-hour is a million kilowatt-hours), about 860 homes’ worth of power. It is a conventional hydroelectric plant, meaning it uses flowing river water, with no fuel burned, to spin its generators.
Environmental impact
Produces electricity without burning fuel, which avoids roughly 3,300 metric tons of carbon dioxide a year compared with producing the same electricity from the national mix of power sources — about the same as not burning about 3,400,000 pounds of coal.*
Nearby places worth exploring
Copenhagen sits in Lewis County, near Lowville and the Tug Hill Plateau, with the Black River running through the county. Whetstone Gulf State Park, known for its deep gorge and rim trails, is another well-known spot in the area.
Local school district
Copenhagen Central School District
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* Homes-powered and emissions comparisons are annual estimates based on national averages from the U.S. Energy Information Administration. “Homes powered” describes a quantity of electricity, not direct service to specific households. How we calculate this.
