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23 - Hudson River Sewage Inputs and Impacts: Past and Present
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- By Thomas M. Brosnan, National Oceanic and Atmospheric Administration, Andrew Stoddard, Dynamic Solutions, Leo J. Hetling, Adjunct Professor Environmental and Energy Engineering, Rensselaer Polytechnic Institute
- Edited by Jeffrey S. Levinton, State University of New York, Stony Brook, John R. Waldman
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- Book:
- The Hudson River Estuary
- Published online:
- 06 January 2010
- Print publication:
- 09 January 2006, pp 335-348
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- Chapter
- Export citation
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Summary
abstract The quality of the Hudson River estuary has been negatively impacted for many years by the discharge of untreated sewage. The abatement of these discharges due to construction and upgrading of wastewater treatment plants (WTP) in the Hudson valley from the 1930s to the 1990s has significantly reduced loadings of suspended solids, oxygen demanding organics, floatables, and pathogens, with lesser reductions observed for nitrogen and phosphorus. In response, water quality conditions have improved significantly. Dissolved oxygen has increased from critically low levels to summer averages that exceed 5 mg l−1 and pollution sensitive insects and marine borers have returned to the estuary. Sanitary quality has also improved with most of the Hudson today considered to meet swimmable water quality standards. Consequently, shellfish beds and bathing beaches have been reopened in New York/New Jersey Harbor and additional beaches are being considered throughout the river. Priorities for the future include: increased capital and operations and maintenance investments for WTPs, improved capture and treatment of combined sewer overflows (CSO), and investigation of the need for nutrient removal.
Introduction
The Hudson River south of the Federal dam at Troy comprises an approximately 240 km long estuarine system that has been subjected to an enormous loading of pollutants from a variety of sources for over three hundred years. Until relatively recently, this loading included the discharge of millions of liters of untreated sewage per day.