2012 GSA Annual Meeting in Charlotte
Paper No. 261-10
Presentation Time: 4:15 PM-4:30 PM

OCCURRENCE OF FECAL INDICATIVE BACTERIA (FIB) IN URBAN LAKES AND ESTUARIES OF NEW YORK CITY, USA

DHAR, Ratan, Geology and Environmental Health Science, Department of Earth and Physical Sciences, School of Arts and Sciences, York College Of CUNY, 94-20, Guy R. Brewer Blvd, Jamaica, NY 11451, rdhar@york.cuny.edu

Increase of nutrients and organic material in recreational waters as a result of anthropogenic activities pose serious health risks in urban environment throughout the world. The impact is demonstrated in the increased levels of Fecal Indicator Bacteria (FIB) in the water and soil columns of recreational waters located in the area of New York City (NYC). The purpose of this study is to understand the extent of microbial contamination in the brackish and relatively fresh water environments of NYC. Recreational waters of NYC with wide range of conductivity (70 - 30k µS/cm) were investigated in Jamaica Bay, a wetland estuary of NYC and six lakes-ponds in Queens county including Meadow Lake (N40º 44.100' W73º 50.328'), Oakland Lake (N40º 45.527', W73º 45.468'), Kissena lake (N40º 44.880', W73º 48.360'), Bowne Pond (N40º 46.260', W73º 48.480'), West Ponds (N40º 37.080', W73º 49.860') and Baisely Ponds (N40º 40.100', W73º 47.000'). This study reports the occurrence and variation of FIB population in Jamaica Bay and fresh water lakes-ponds using the EPA approved IDEXX method for microbiology analysis in the water. The method was successfully applied for soil microbial analysis by extracting the microbes from the soils in distilled water, sterilized distilled, buffered and rain water. Temporal variation of FIB were examined by periodic sampling in several sites of Jamaica Bay and Meadow lakes. FIB counts for Jamaica bay were found to be above the state bathing standard. Preliminary results from all six lakes were also found to be well above the state standard for bathing and boating. FIB counts in soil column were very striking with more than million counts per kg of dry soils. A recent laboratory column experiment with rain water and soils from Bowne Pond area showed tens of thousands FIB in eluate rain water. The results provide relevant information to stakeholders for effective management of issues related to the area’s environmental sanitation, and to public health problems and ecosystem degradation that might occur if appropriate management practices are not adopted.

2012 GSA Annual Meeting in Charlotte
General Information for this Meeting
Session No. 261
Geochemistry of Urban Environments
Charlotte Convention Center: 202AB
1:30 PM-5:30 PM, Wednesday, 7 November 2012

Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 609

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