The Norwalk River Watershed
September 17, 2026
The Norwalk River Watershed spans across seven communities in southwestern Connecticut and eastern New York. This geonarrative explores key water quality challenges, including nutrient pollution, pesticide runoff, and chloride contamination, while highlighting the U.S. Geological Survey's efforts to monitor and understand the collected data within the watershed.
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Algal Community Composition within the Lower Norwalk River
Harmful algal blooms (HABs), fish kills, and shellfish contamination are increasingly affecting coastal estuaries like the Norwalk River. Understanding the microscopic algae responsible for these events is essential for protecting public health, local economies, and marine ecosystems. As the environmental conditions of estuaries continue to change from nutrient enrichment, warming temperatures...
Continuous Water Quality Monitoring in the Norwalk River Estuary
The U.S. Geological Survey (USGS), in cooperation with the U.S. Environmental Protection Agency Long Island Sound Study (LISS), is investigating how excess nutrients and low dissolved oxygen affect the water-quality of the lower portion of the Norwalk River Harbor.
Related
Algal Community Composition within the Lower Norwalk River
Harmful algal blooms (HABs), fish kills, and shellfish contamination are increasingly affecting coastal estuaries like the Norwalk River. Understanding the microscopic algae responsible for these events is essential for protecting public health, local economies, and marine ecosystems. As the environmental conditions of estuaries continue to change from nutrient enrichment, warming temperatures...
Continuous Water Quality Monitoring in the Norwalk River Estuary
The U.S. Geological Survey (USGS), in cooperation with the U.S. Environmental Protection Agency Long Island Sound Study (LISS), is investigating how excess nutrients and low dissolved oxygen affect the water-quality of the lower portion of the Norwalk River Harbor.