Orangetown Sewage Treatment Plant Outfall

Piermont STP

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

82 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
10/16/201715531Beach Advisory0.10.00.00.00.2
09/11/2017<10Acceptable0.00.00.00.00.0
08/14/2017<10Acceptable0.00.00.40.30.8
07/10/20173873Beach Advisory0.00.00.02.22.2
06/12/201710Acceptable0.00.00.00.00.0
05/15/2017<10Acceptable0.00.11.70.01.8
04/04/201720Acceptable1.10.00.00.11.2
10/13/2016204Beach Advisory0.10.00.00.00.1
09/14/201652Acceptable0.00.00.00.00.0
08/15/201610Acceptable0.00.10.10.20.4
07/13/201610Acceptable0.00.00.00.00.0
06/15/201630Acceptable0.00.00.00.00.0
05/20/201652Acceptable0.00.00.00.00.0
10/12/201520Acceptable0.00.00.00.10.1
09/11/2015<10Acceptable0.31.30.00.01.6
08/12/2015<10Acceptable0.01.00.00.01.0
07/08/2015<10Acceptable0.00.10.00.00.1
06/11/2015<10Acceptable0.00.00.20.20.4
05/12/201524196Beach Advisory0.00.00.00.00.0
10/13/201431Acceptable0.00.00.40.00.4
09/08/201410Acceptable0.00.00.00.00.0
08/12/201431Acceptable0.00.00.00.00.0
07/08/201441Acceptable0.20.00.00.00.2
06/13/201431Acceptable1.40.00.10.01.5
05/13/201496Beach Advisory0.00.00.10.30.4
10/17/201341Acceptable0.00.00.00.00.0
09/19/201331Acceptable0.00.00.00.00.0
08/15/201330Acceptable0.00.00.70.41.1
07/18/201320Acceptable0.00.00.00.00.0
06/20/201330Acceptable0.00.00.30.20.5
05/30/201310Acceptable0.00.00.40.00.4
11/08/2012>24196Beach Advisory0.00.10.00.00.1
10/11/201251Acceptable0.00.10.00.00.1
09/11/201210Acceptable0.00.00.01.41.4
08/14/201210Acceptable0.00.00.00.00.0
07/17/2012<10Acceptable0.00.00.20.00.2
06/12/201220Acceptable0.00.00.00.00.0
05/16/201220Acceptable0.10.40.10.00.6
10/20/201110Acceptable0.00.10.00.00.1
09/15/2011<10Acceptable0.00.00.00.00.0
08/17/2011<10Acceptable0.00.00.03.43.4
07/18/2011<10Acceptable0.00.00.00.00.0
06/28/201110Acceptable0.00.00.00.00.0
05/17/2011538Beach Advisory1.20.00.80.02.0
10/13/2010<10Acceptable0.00.10.30.00.4
09/12/201051Acceptable0.00.00.00.00.0
08/18/201097Beach Advisory0.00.00.20.30.5
07/22/2010120Beach Advisory0.00.10.01.41.5
06/16/2010134Beach Advisory0.00.00.00.00.0
05/22/2010<10Acceptable0.00.00.00.00.0
10/20/20091553Beach Advisory0.00.00.00.00.0
09/15/200981Beach Advisory0.00.00.00.00.0
08/21/2009<10Acceptable0.00.00.00.00.0
07/29/2009216Beach Advisory0.00.00.00.20.2
06/23/200931Acceptable0.00.00.60.51.1
06/06/2009<10Acceptable0.00.80.40.41.6
05/13/20091396Beach Advisory0.00.00.00.00.0
10/21/200810112Beach Advisory0.00.00.00.00.0
09/23/200863Beach Advisory0.00.00.00.00.0
08/21/200874Beach Advisory0.00.00.00.00.0
07/20/200880Beach Advisory0.00.00.00.00.0
07/15/2008158Beach Advisory0.01.10.00.01.1
06/25/20081217Beach Advisory0.00.00.00.10.1
05/20/2008222Beach Advisory0.00.00.20.10.3
05/19/2008364Beach Advisory0.00.20.10.91.2
09/09/20071Acceptable0.00.00.00.00.0
09/06/20073Acceptable0.00.00.00.00.0
08/23/2007324Beach Advisory0.00.01.30.11.4
08/16/20074Acceptable0.00.00.00.10.1
07/16/20075Acceptable0.00.00.00.00.0
07/11/200711Acceptable0.00.00.00.00.0
06/20/20072Acceptable0.10.30.00.00.4
06/18/200716Acceptable0.00.00.00.00.0
05/21/2007179Beach Advisory0.00.00.20.00.2
04/25/20071500Beach Advisory0.00.00.00.00.0
04/18/2007584Beach Advisory0.00.00.97.68.5
12/06/2006142Beach Advisory0.00.00.00.00.0
11/10/2006335Beach Advisory0.00.03.60.03.6
10/19/20061500Beach Advisory0.10.01.10.01.2
10/18/20061500Beach Advisory0.01.10.00.01.1
10/17/20061500Beach Advisory1.10.00.00.01.1
09/26/20067Acceptable0.00.00.00.10.1

Entero Count (fecal indicator) and Rainfall Correlation

82 Samples taken

All Water Quality Parameters

82 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
10/16/201715531Beach Advisory68.19.54.130.080.3
09/11/2017<10Acceptable707.77.390.390.1
08/14/2017<10Acceptable79.16.67.644.991.4
07/10/20173873Beach Advisory74.93.72.811.592.1
06/12/201710Acceptable72.123.423.494.6
05/15/2017<10Acceptable57.90.63.933.697.0
04/04/201720Acceptablen/an/an/an/an/a
10/13/2016204Beach Advisory66.19.33.25071
09/14/201652Acceptable77.77.50.8n/a90
08/15/201610Acceptable85.15.719.330146
07/13/201610Acceptable78.47.1111493
06/15/201630Acceptable71.54.47.828104
05/20/201652Acceptable63.13.513.1n/a111
10/12/201520Acceptable66.87.84.96976
09/11/2015<10Acceptable77.29.96.23879
08/12/2015<10Acceptable77.89.414.63389
07/08/2015<10Acceptable79.7339.525137
06/11/2015<10Acceptable73.6514.920116
05/12/201524196Beach Advisory67.55.73.86187
10/13/201431Acceptable63.49.20.312386
09/08/201410Acceptable76.16.632.331110
08/12/201431Acceptable77.67.47.57386
07/08/201441Acceptable77.13.66.32484
06/13/201431Acceptable67.96.737.117094
05/13/201496Beach Advisory59.63.73.88395
10/17/201341Acceptable669.57.15983
09/19/201331Acceptable69.46.96.46886
08/15/201330Acceptable74510.62487
07/18/201320Acceptable76.36.34.42262
06/20/201330Acceptable69.61.263992
05/30/201310Acceptable65.82.22.24891
11/08/2012>24196Beach Advisory50.532.73489
10/11/201251Acceptable66.265.82274
09/11/201210Acceptable72.66.96.83472
08/14/201210Acceptable79.88.852689
07/17/2012<10Acceptable80.28.619.756113
06/12/201220Acceptable71.9411.74691
05/16/201220Acceptable64.21.45.53097
10/20/201110Acceptable63.51.10.46594
09/15/2011<10Acceptable71.60.11.910982
08/17/2011<10Acceptable79.66.33.96589
07/18/2011<10Acceptable804.33.268n/a
06/28/201110Acceptable77.62.27.22490
05/17/2011538Beach Advisory59.82.65.26890
10/13/2010<10Acceptable63.80.25.32393
09/12/201051Acceptable71.58.55.411678
08/18/201097Beach Advisory77.56.95.82274
07/22/2010120Beach Advisory78.36.232.73898
06/16/2010134Beach Advisory72.47.76.79685
05/22/2010<10Acceptable65.45.56.62486
10/20/20091553Beach Advisory556.93.312488
09/15/200981Beach Advisory72.762.14670
08/21/2009<10Acceptable815.512.79791
07/29/2009216Beach Advisory79.13.53.72584
06/23/200931Acceptable70.70.61.34997
06/06/2009<10Acceptablen/an/an/an/an/a
05/13/20091396Beach Advisory62.72.24.176101
10/21/200810112Beach Advisory59.38.42.11579
09/23/200863Beach Advisory69.34.82.22474
08/21/200874Beach Advisory75.25.53.52674
07/20/200880Beach Advisoryn/an/an/an/an/a
07/15/2008158Beach Advisory76.35.64.73785
06/25/20081217Beach Advisory74.27.42.32681
05/20/2008222Beach Advisory58.64.91.812889
05/19/2008364Beach Advisory60.241.87089
09/09/20071Acceptable76.310.64.46476
09/06/20073Acceptable74.79.52.93774
08/23/2007324Beach Advisory72.46.82.82069
08/16/20074Acceptable78.48.25.74986
07/16/20075Acceptable77.48.84.67790
07/11/200711Acceptable778.24.23588
06/20/20072Acceptablen/an/an/an/an/a
06/18/200716Acceptablen/an/an/an/an/a
05/21/2007179Beach Advisory61.621.515685
04/25/20071500Beach Advisory50.70.11.4208102
04/18/2007584Beach Advisory43.20.41.615498
12/06/2006142Beach Advisory44.50.91.51495
11/10/2006335Beach Advisory52.90.22.38995
10/19/20061500Beach Advisoryn/an/an/an/an/a
10/18/20061500Beach Advisory63.55.52.82676
10/17/20061500Beach Advisoryn/an/an/an/an/a
09/26/20067Acceptable68.16.13n/a100

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:

Piermont, NY
There are two sewage treatment plant outfalls at this sampling site. Use includes boating, kayaking and fishing.

Agencies Responsible:

Rockland County Dept. of Health: 845-364-2900 and NYSDEC Region 3: 914-428-2505

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