Norrie Point mid-channel

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

61 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
10/18/20172Acceptable0.00.00.00.00.0
09/13/20171Acceptable0.00.00.00.00.0
08/16/20172Acceptable0.00.10.00.00.1
07/12/20173Acceptable0.00.20.00.00.2
06/14/2017<1Acceptable0.00.40.00.00.4
05/17/2017<1Acceptable0.00.00.00.10.1
04/06/201744Acceptable0.50.00.70.01.2
10/17/2016<1Acceptable0.00.00.00.00.0
09/16/20161Acceptable0.00.00.00.00.0
08/17/20166Acceptable0.10.10.00.10.3
07/15/2016<1Acceptable0.00.00.00.00.0
06/17/20162Acceptable0.00.00.00.00.0
05/22/2016<1Acceptable0.00.00.00.00.0
10/14/20152Acceptable0.00.00.00.00.0
09/13/20151Acceptable0.10.60.10.91.7
08/14/2015<1Acceptable0.00.00.00.90.9
07/10/2015<1Acceptable0.00.10.00.10.2
06/12/20151Acceptable0.00.00.00.30.3
05/13/20151Acceptable0.00.00.00.00.0
10/15/20141Acceptable0.00.00.00.00.0
09/09/20141Acceptable0.00.00.00.10.1
08/13/20144Acceptable0.00.00.00.00.0
07/09/20143Acceptable0.00.10.20.00.3
06/14/20147Acceptable0.00.10.00.10.2
05/14/2014<1Acceptable0.00.00.00.00.0
10/19/20131Acceptable0.00.00.00.00.0
09/20/20131Acceptable0.00.00.00.00.0
08/18/20133Acceptable0.00.00.00.00.0
07/20/20133Acceptable0.00.00.10.00.1
06/22/201318Acceptable0.00.00.00.00.0
06/02/20138Acceptable0.00.00.00.00.0
10/14/20122Acceptable0.00.00.00.00.0
09/13/201211Acceptable0.00.00.00.00.0
08/16/2012<1Acceptable0.00.30.10.00.4
07/20/20124Acceptable0.40.00.20.00.6
06/14/20122Acceptable0.00.20.30.00.5
05/18/20122Acceptable0.00.00.00.30.3
10/18/2011106Beach Advisory0.00.00.10.00.1
09/17/201117Acceptable0.00.00.10.00.1
08/19/201112Acceptable0.00.10.00.10.2
07/16/20112Acceptable0.00.00.00.00.0
06/30/20116Acceptable0.00.50.00.00.5
05/18/2011119Beach Advisory0.90.80.10.32.1
10/15/201017Acceptable0.40.80.00.31.5
09/13/20105Acceptable0.00.00.00.00.0
08/20/20103Acceptable0.00.00.00.00.0
07/20/20101Acceptable0.00.00.00.00.0
06/17/20102Acceptable0.00.00.00.00.0
05/24/20101Acceptable0.00.00.00.00.0
10/22/2009<1Acceptable0.00.00.00.00.0
09/16/20092Acceptable0.00.00.00.00.0
08/23/200910Acceptable0.00.30.30.00.6
07/30/20091203Beach Advisory0.00.30.00.20.5
06/10/20091Acceptable0.00.90.00.00.9
05/14/20093Acceptable0.10.00.00.00.1
10/22/20084Acceptable0.00.00.00.00.0
09/15/2008<1Acceptable0.00.20.10.40.7
08/07/20081Acceptable0.00.30.00.00.3
07/16/20081Acceptable0.00.00.60.00.6
06/17/20081Acceptable0.00.20.00.10.3
05/21/20081Acceptable0.00.00.00.10.1

Entero Count (fecal indicator) and Rainfall Correlation

61 Samples taken

All Water Quality Parameters

61 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
10/18/20172Acceptable65.40.13.011.288.7
09/13/20171Acceptable70.20.15.17.289.6
08/16/20172Acceptable76.50.17.812.4101
07/12/20173Acceptable76.40.12.921.282.3
06/14/2017<1Acceptable66.80.15.69.2101.8
05/17/2017<1Acceptable56.10.12.513.198.9
04/06/201744Acceptable42.30.11.675.9102.2
10/17/2016<1Acceptable62.90.14.73593
09/16/20161Acceptable75.50.14.2n/a86
08/17/20166Acceptable81.50.14.12389
07/15/2016<1Acceptable78.10.15390
06/17/20162Acceptable72.10.14.32095
05/22/2016<1Acceptable610.13.129108
10/14/20152Acceptable61.80.152987
09/13/20151Acceptable77.90.15.21787
08/14/2015<1Acceptable77.90.16.1993
07/10/2015<1Acceptable73.40.12.51385
06/12/20151Acceptable73.10.15.33103
05/13/20151Acceptable640.14.432n/a
10/15/20141Acceptable64.80.13.11890
09/09/20141Acceptable76.40.12.71687
08/13/20144Acceptable78.20.11.82185
07/09/20143Acceptable77.50.12.82492
06/14/20147Acceptable71.90.15.421103
05/14/2014<1Acceptable59.20.14.923104
10/19/20131Acceptable64.10.12.72192
09/20/20131Acceptable71.70.13.71391
08/18/20133Acceptable75.50.12.52882
07/20/20133Acceptable81.90.12.74274
06/22/201318Acceptable67.80.12.510895
06/02/20138Acceptable66.20.17.236105
10/14/20122Acceptable610.12.42888
09/13/201211Acceptable76.20.14.47697
08/16/2012<1Acceptable82.20.22.1997
07/20/20124Acceptable80.50.122383
06/14/20122Acceptable73.40.232096
05/18/20122Acceptable63.80.13.14395
10/18/2011106Beach Advisory59.80.10.56192
09/17/201117Acceptable67.60.11.316787
08/19/201112Acceptable77.10.1n/a5595
07/16/20112Acceptable78.90.13.521n/a
06/30/20116Acceptable74.70.13.31692
05/18/2011119Beach Advisoryn/an/an/an/an/a
10/15/201017Acceptable58.20.12.82486
09/13/20105Acceptable730.17.81285
08/20/20103Acceptable79.30.17.6990
07/20/20101Acceptable81.60.13.7877
06/17/20102Acceptable72.70.16.91685
05/24/20101Acceptable64.70.13.41395
10/22/2009<1Acceptable54.20.11.52797
09/16/20092Acceptable70.80.14.41691
08/23/200910Acceptable79.90.14.81993
07/30/20091203Beach Advisory76.80.14.325102
06/10/20091Acceptablen/an/an/an/an/a
05/14/20093Acceptable61.90.111.219108
10/22/20084Acceptable580.110.313101
09/15/2008<1Acceptablen/an/an/an/an/a
08/07/20081Acceptablen/an/an/an/an/a
07/16/20081Acceptable81.50.12.625109
06/17/20081Acceptablen/an/an/an/an/a
05/21/20081Acceptable58.40.12.72097

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:

Esopus, NY
This deep water site has boating, kayaking and fishing.

Agencies Responsible:

Ulster County Dept. of Health: 845-340-3010, Dutchess County Dept. of Health: 845-486-3400 and NYSDEC Region 3: 845-256-3000

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