Furnace Brook

Furnace Brook

Physical/Chemical Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Entero Count (fecal indicator) and Rainfall

72 Samples taken

Sample Date [i] Enterococcus Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
SortSortSortSortSortSortSortSort
10/17/2017384Beach Advisory0.00.10.00.00.2
09/12/201710Acceptable0.00.00.00.00.0
08/15/20171793Beach Advisory0.10.00.00.40.5
07/11/2017243Beach Advisory0.40.10.00.00.5
06/13/201752Acceptable0.00.00.00.00.0
05/16/201731Acceptable0.00.00.11.71.8
10/14/201631Acceptable0.00.10.00.00.1
09/15/201685Beach Advisory0.00.20.00.00.2
08/16/2016<10Acceptable0.00.00.10.10.2
07/14/201630Acceptable0.20.00.00.00.2
06/16/2016<10Acceptable0.00.00.00.00.0
05/21/2016<10Acceptable0.00.00.00.00.0
10/13/2015<10Acceptable0.00.00.00.00.0
09/12/2015<10Acceptable0.00.31.30.01.6
08/13/2015<10Acceptable0.00.01.00.01.0
07/09/201510Acceptable0.30.30.10.00.7
06/11/2015<10Acceptable0.00.00.20.20.4
05/12/2015<10Acceptable0.00.00.00.00.0
10/14/2014<10Acceptable0.00.00.00.40.4
09/08/201420Acceptable0.00.00.00.00.0
08/12/201410Acceptable0.00.00.00.00.0
07/08/201441Acceptable0.20.00.00.00.2
06/13/2014554Beach Advisory1.40.00.10.01.5
05/13/201431Acceptable0.00.00.10.30.4
10/17/201352Acceptable0.00.00.00.00.0
09/19/201310Acceptable0.00.00.00.00.0
08/15/201320Acceptable0.00.00.70.41.1
07/18/201331Acceptable0.00.00.00.00.0
06/20/201374Beach Advisory0.00.00.30.20.5
05/30/2013<10Acceptable0.00.00.40.00.4
10/11/201252Acceptable0.00.10.00.00.1
09/11/201210Acceptable0.00.00.01.41.4
08/14/201241Acceptable0.00.00.00.00.0
07/17/201210Acceptable0.00.00.20.00.2
06/12/201263Beach Advisory0.50.00.00.00.5
05/16/2012<10Acceptable0.10.40.10.00.6
10/20/2011160Beach Advisory0.00.10.00.00.1
09/15/20114106Beach Advisory0.00.00.00.00.0
08/17/2011<10Acceptable0.00.00.03.43.4
07/18/2011<10Acceptable0.00.00.00.00.0
06/28/2011<10Acceptable0.00.00.00.00.0
05/17/20112481Beach Advisory1.20.00.80.02.0
10/13/2010<10Acceptable0.00.10.30.00.4
09/12/2010<10Acceptable0.00.00.00.00.0
08/18/2010<10Acceptable0.00.00.20.30.5
07/22/2010132Beach Advisory0.00.10.01.41.5
06/16/201010Acceptable0.00.00.00.00.0
05/22/2010<10Acceptable0.00.00.00.00.0
10/20/2009<10Acceptable0.00.00.00.00.0
09/15/2009<10Acceptable0.00.00.00.00.0
08/21/200910Acceptable0.00.00.00.00.0
07/29/200931Acceptable0.60.00.00.20.8
06/23/2009<10Acceptable0.00.00.60.51.1
06/08/2009<10Acceptable0.00.00.00.80.8
05/13/20096Acceptable0.00.00.00.00.0
10/21/2008<10Acceptable0.00.00.00.00.0
09/23/2008<10Acceptable0.00.00.00.00.0
08/21/2008<10Acceptable0.00.00.00.00.0
07/15/200845Acceptable0.01.10.00.01.1
06/25/2008337Beach Advisory0.00.00.00.10.1
06/16/2008185Beach Advisory0.00.01.70.01.7
05/20/200841Acceptable0.00.00.20.10.3
09/09/200719Acceptable0.00.00.00.00.0
08/23/200719Acceptable0.00.01.30.11.4
07/16/20078Acceptable0.00.00.00.00.0
06/28/200710Acceptable0.00.70.00.00.7
06/20/20076Acceptable0.10.30.00.00.4
05/21/200711Acceptable0.00.00.20.00.2
04/25/200729Acceptable0.00.00.00.00.0
12/06/200650Acceptable0.00.00.00.00.0
10/20/200634Acceptable0.40.10.01.11.6
09/19/200628Acceptable0.00.00.00.00.0

Entero Count (fecal indicator) and Rainfall Correlation

72 Samples taken

All Water Quality Parameters

72 Samples taken

Sample Date [i] Entero Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

Quality [i] Temp (f)

Temperature

Hudson River water temperature changes seasonally. Surface water temperature can change on small scales in the river reflecting natural and human influences.

[i] Salinity

Salinity

Estuaries like the Hudson are where freshwaters in rivers meet the sea. Salinity tells us about the relative contribution of fresh and salt water within a particular region of the estuary. 

[i] Chlorophyll

Chlorophyll

A measure of the amount of microscopic algae present in the water. High chlorophyll counts can mean high levels of the nutrients phosphorus and nitrogen, and the threat, or presence, of algae blooms.

[i] Turbidity

Turbidity

Turbidity is a measure of the amount of fine particles suspended in the water. As turbidity rises, light penetration, a key factor for aquatic plants and algae, diminishes.

[i] Oxygen

Oxygen

Oxygen concentrations in the water are closely connected to biological activities. Surface waters are typically in equilibrium with the atmosphere such that the oxygen concentration near the surface is close to fully saturated (100%).

SortSortSortSortSortSortSortSort
10/17/2017384Beach Advisory67.26.72.113.285.8
09/12/201710Acceptable73.85.84.415.485.1
08/15/20171793Beach Advisory80.23.88.813.491.4
07/11/2017243Beach Advisory78.82.35.612.298.8
06/13/201752Acceptable73.30.26.814120.1
05/16/201731Acceptable60.00.13.727.797.7
10/14/201631Acceptable64.68.93.13691
09/15/201685Beach Advisory76.786.5n/a95
08/16/2016<10Acceptable84.94.911.339102
07/14/201630Acceptable79.55.115.812100
06/16/2016<10Acceptable72.33.413.421107
05/21/2016<10Acceptable60.61.85.26898
10/13/2015<10Acceptable67.46.16.42292
09/12/2015<10Acceptable79.46.942482
08/13/2015<10Acceptable79.65.827.920110
07/09/201510Acceptable77.60.57.62989
06/11/2015<10Acceptable75.72.311.815115
05/12/2015<10Acceptable67.633.550102
10/14/2014<10Acceptable68.25.63.22390
09/08/201420Acceptable78.4411.328101
08/12/201410Acceptable78.75.16.33886
07/08/201441Acceptable81.31.15.826100
06/13/2014554Beach Advisoryn/an/an/an/an/a
05/13/201431Acceptable61.22.42.62399
10/17/201352Acceptable68.46.33.11188
09/19/201310Acceptable733.94.91595
08/15/201320Acceptable79.32.25.22897
07/18/201331Acceptable86.82.47.86289
06/20/201374Beach Advisory72.20.12.61799
05/30/2013<10Acceptable70.10.31.92293
10/11/201252Acceptable64.13.95.22494
09/11/201210Acceptable75.55.15.110494
08/14/201241Acceptable81.16.73.81685
07/17/201210Acceptable84.27.313.66113
06/12/201263Beach Advisory72.80.73.46093
05/16/2012<10Acceptable66.90.24.623114
10/20/2011160Beach Advisory63.60.11.420891
09/15/20114106Beach Advisory700.11.812183
08/17/2011<10Acceptable83.83.74.631103
07/18/2011<10Acceptable83.41.25.817n/a
06/28/2011<10Acceptable79.61.57.25498
05/17/20112481Beach Advisory62.20.3n/an/a99
10/13/2010<10Acceptable65.40.14.72487
09/12/2010<10Acceptable735.38.42385
08/18/2010<10Acceptable83.15.85.18991
07/22/2010132Beach Advisory83.76.220.942151
06/16/201010Acceptable73.35.16.53487
05/22/2010<10Acceptable67.93.64.21994
10/20/2009<10Acceptable59.143.41790
09/15/2009<10Acceptable77.44.44.817110
08/21/200910Acceptable83.42.87.91296
07/29/200931Acceptable79.30.85.63189
06/23/2009<10Acceptable73.10.10.919110
06/08/2009<10Acceptablen/an/an/an/an/a
05/13/20096Acceptable64.70.32.626112
10/21/2008<10Acceptable62.86.53.21089
09/23/2008<10Acceptable74.64.22.5895
08/21/2008<10Acceptable78.83.74.91092
07/15/200845Acceptable82.14.54.318116
06/25/2008337Beach Advisory77.34.52.91791
06/16/2008185Beach Advisoryn/an/an/an/an/a
05/20/200841Acceptable59.12.11.54197
09/09/200719Acceptable81.97.53.525109
08/23/200719Acceptable75.35.72.81688
07/16/20078Acceptable81.85.83.625103
06/28/200710Acceptablen/an/an/an/an/a
06/20/20076Acceptablen/an/an/an/an/a
05/21/200711Acceptable63.50.21.66096
04/25/200729Acceptable49.30.10.4338107
12/06/200650Acceptable44.60.11.11396
10/20/200634Acceptablen/an/an/an/an/a
09/19/200628Acceptablen/an/an/an/an/a

Water Quality*

Acceptable (0–60) Beach Advisory (61+)

*Single sample thresholds;
Enterococcus count per 100mL

Prior Four Day Rainfall
(in inches)

Dry Weather (0–0.25) Wet Weather (0.25+)

Enterococcus is an EPA-approved fecal contamination indicator.

Samples taken by Riverkeeper, Lamont-Doherty Earth Observatory and CUNY Queens College staff, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

Rainfall data comes from wunderground.com. Wet weather is a common trigger of fecal contamination.

What do the Numbers Mean?

Water Quality scoring is based on the 2012 Recreational Water Quality Criteria from the US Environmental Protection Agency (EPA) for safe swimming. Learn More

About this location:

Cortlandt, NY
The Hudson, off Furnace Brook, has recreational and subsistence fishing, as well as kayaking, and swimming from recreational boats.

Agencies Responsible:

Westchester County Dept. of Health: 914-813-5000 and NYSDEC Region 3: 914-428-2505

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